686 results match your criteria Aob Plants[Journal]


Advancing an interdisciplinary framework to study seed dispersal ecology.

AoB Plants 2020 Apr 19;12(2):plz048. Epub 2019 Aug 19.

Department of Biology, University of Maryland, College Park, MD, USA.

Although dispersal is generally viewed as a crucial determinant for the fitness of any organism, our understanding of its role in the persistence and spread of plant populations remains incomplete. Generalizing and predicting dispersal processes are challenging due to context dependence of seed dispersal, environmental heterogeneity and interdependent processes occurring over multiple spatial and temporal scales. Current population models often use simple phenomenological descriptions of dispersal processes, limiting their ability to examine the role of population persistence and spread, especially under global change. Read More

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http://dx.doi.org/10.1093/aobpla/plz048DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7179845PMC

Introduction to the Special Issue: The role of seed dispersal in plant populations: perspectives and advances in a changing world.

AoB Plants 2020 Apr 13;12(2):plaa010. Epub 2020 Mar 13.

Department of Ecology, Evolution, and Organismal Biology, Iowa State University, Ames, IA, USA.

Despite the importance of seed dispersal as a driving process behind plant community assembly, our understanding of the role of seed dispersal in plant population persistence and spread remains incomplete. As a result, our ability to predict the effects of global change on plant populations is hampered. We need to better understand the fundamental link between seed dispersal and population dynamics in order to make predictive generalizations across species and systems, to better understand plant community structure and function, and to make appropriate conservation and management responses related to seed dispersal. Read More

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http://dx.doi.org/10.1093/aobpla/plaa010DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7164217PMC

Invasion, isolation and evolution shape population genetic structure in .

AoB Plants 2020 Apr 12;12(2):plaa011. Epub 2020 Mar 12.

UK Centre for Ecology & Hydrology, Penicuik, Midlothian, Scotland, UK.

The distribution and genetic structure of most plant species in Britain and Ireland bear the imprint of the last ice age. These patterns were largely shaped by random processes during recolonization but, in angiosperms, whole-genome duplication may also have been important. We investigate the distribution of cytotypes of , considering DNA variation, postglacial colonization, environmental partitioning and reproductive barriers. Read More

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http://dx.doi.org/10.1093/aobpla/plaa011DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7141102PMC

The climatic association of population divergence and future extinction risk of .

AoB Plants 2020 Apr 12;12(2):plaa012. Epub 2020 Mar 12.

Institute of Ecology and Evolutionary Biology, National Taiwan University, Taipei, Taiwan.

Under intraspecific differentiation driven by differential climatic adaptation, it may be expected that intraspecific genetic groups occur at distinct environments. Populations occupying different niches may therefore differ in their ability to cope with climate change. Here, we addressed this hypothesis with a wild tomato, . Read More

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http://dx.doi.org/10.1093/aobpla/plaa012DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7107907PMC

The importance of quantitative trait differentiation in restoration: landscape heterogeneity and functional traits inform seed transfer guidelines.

AoB Plants 2020 Apr 7;12(2):plaa009. Epub 2020 Mar 7.

Department of Biological Sciences, North Dakota State University, Fargo, ND, USA.

For widely distributed species, understanding the scale over which genetic variation correlates to landscape structure and composition is critical. Particularly within the context of restoration, the evolution of genetic differences may impact success if seeds are maladapted to the restoration environment. In this study, we used to quantify the scale over which genetic differences for quantitative traits important to adaptation have evolved, comparing the proportion of variance attributed to broad regional- and local population-level effects. Read More

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http://dx.doi.org/10.1093/aobpla/plaa009DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7112727PMC

Population genetic variability and distribution of the endangered Greek endemic under climate change scenarios.

AoB Plants 2020 Apr 25;12(2):plaa007. Epub 2020 Feb 25.

Department of Crop Science, Laboratory of Plant Breeding and Biometry, Agricultural University of Athens, Iera Odos, Athens, Greece.

The Mediterranean hot spot includes numerous endemic and socio-economically important plant species seriously threatened by climate change and habitat loss. In this study, the genetic diversity of five populations of , an endangered endemic species from northern Peloponnisos, Greece and a wild relative of the cultivated , was investigated using inter-simple sequence repeats (ISSRs) and amplified fragment length polymorphism (AFLP) markers in order to determine levels and structure of genetic variability. Nei's gene diversity by ISSR and AFLP markers indicated medium to high genetic diversity at the population level. Read More

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http://dx.doi.org/10.1093/aobpla/plaa007DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7102496PMC

Functional composition and diversity of leaf traits in subalpine versus alpine vegetation in the Apennines.

AoB Plants 2020 Apr 26;12(2):plaa004. Epub 2020 Mar 26.

EnvixLab, Department of Bioscience and Territory, University of Molise, Termoli, Italy.

Mediterranean high mountain grasslands are shaped by climatic stress and understanding their functional adaptations can contribute to better understanding ecosystems' response to global change. The present work analyses the plant functional traits of high-elevation grasslands growing in Mediterranean limestone mountains to explore, at the community level, the presence of different plant strategies for resource use (conservative vs. acquisitive) and functional diversity syndromes (convergent or divergent). Read More

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http://dx.doi.org/10.1093/aobpla/plaa004DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7098876PMC

Small spaces, big impacts: contributions of micro-environmental variation to population persistence under climate change.

AoB Plants 2020 Apr 18;12(2):plaa005. Epub 2020 Feb 18.

Department of Genetics, University of Georgia, Athens, GA, USA.

Individuals within natural populations can experience very different abiotic and biotic conditions across small spatial scales owing to microtopography and other micro-environmental gradients. Ecological and evolutionary studies often ignore the effects of micro-environment on plant population and community dynamics. Here, we explore the extent to which fine-grained variation in abiotic and biotic conditions contributes to within-population variation in trait expression and genetic diversity in natural plant populations. Read More

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http://dx.doi.org/10.1093/aobpla/plaa005DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7082537PMC

Plasticity to drought and ecotypic differentiation in populations of a crop wild relative.

AoB Plants 2020 Apr 12;12(2):plaa006. Epub 2020 Feb 12.

Área de Biodiversidad y Conservación, Universidad Rey Juan Carlos, C/Tulipán s/n, Móstoles, Madrid, Spain.

Populations of widely distributed species often exhibit geographic variation in functional traits in response to environmental heterogeneity. Such trait variation may be the result of different adaptive mechanisms, including genetically based differentiation, phenotypic plasticity or a combination of both. Disentangling the genetic and environmental components of trait variation may be particularly interesting in crop wild relatives, since they may provide unique reservoirs of genetic diversity for crop improvement. Read More

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http://dx.doi.org/10.1093/aobpla/plaa006DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7065737PMC

Simulating the effects of local adaptation and life history on the ability of plants to track climate shifts.

Authors:
Emily V Moran

AoB Plants 2020 Feb 14;12(1):plaa008. Epub 2020 Feb 14.

Department of Life and Environmental Sciences, University of California Merced, Merced, CA, USA.

Many studies have examined the impact of dispersal on local adaptation, but much less attention has been paid to how local adaptation influences range shifts. The aim of this study was to test how local adaptation might affect climate-driven range shifts in plants, and if this might differ between plants with different life histories. Simulated range shift dynamics were compared for hypothetical annual, perennial and tree species, each comprised of either one plastic genotype or six locally adapted genotypes. Read More

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http://dx.doi.org/10.1093/aobpla/plaa008DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7046178PMC
February 2020

Range-wide neutral and adaptive genetic structure of an endemic herb from Amazonian Savannas.

AoB Plants 2020 Feb 31;12(1):plaa003. Epub 2020 Jan 31.

Instituto Tecnológico Vale, Desenvolvimento Sustentável, Belém-PA, Brazil.

Conserving genetic diversity in rare and narrowly distributed endemic species is essential to maintain their evolutionary potential and minimize extinction risk under future environmental change. In this study we assess neutral and adaptive genetic structure and genetic diversity in (Melastomataceae), an endemic herb from Amazonian Savannas. Using RAD sequencing we identified a total of 9365 SNPs in 150 individuals collected across the species' entire distribution range. Read More

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http://dx.doi.org/10.1093/aobpla/plaa003DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7043808PMC
February 2020

Ectopic expression of the sesame MYB transcription factor promotes root growth and modulates ABA-mediated tolerance to drought and salt stresses in .

AoB Plants 2020 Feb 24;12(1):plz081. Epub 2019 Dec 24.

Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences, Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture, No.2 Xudong 2nd Road, Wuhan, China.

An increasing number of candidate genes related to abiotic stress tolerance are being discovered and proposed to improve the existing cultivars of the high oil-bearing crop sesame ( L.). However, the functional validation of these genes is remarkably lacking. Read More

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http://dx.doi.org/10.1093/aobpla/plz081DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7019004PMC
February 2020

Root flavonoids are related to enhanced AMF colonization of an invasive tree.

AoB Plants 2020 Feb 11;12(1):plaa002. Epub 2020 Jan 11.

School of Life Sciences, Henan University, Kaifeng, Henan, China.

Arbuscular mycorrhizal fungi (AMF) are important mutualistic microbes in soil, which have capacity to form mutualistic associations with most land plants. Arbuscular mycorrhizal fungi play an important role in plant invasions and their interactions with invasive plants have received increasing attention. However, the chemical mechanisms underlying the interactions of AMF and invasive plants are still poorly understood. Read More

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http://dx.doi.org/10.1093/aobpla/plaa002DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7015461PMC
February 2020

Gene copy number is associated with phytochemistry in .

AoB Plants 2019 Dec 20;11(6):plz074. Epub 2019 Nov 20.

Kane Laboratory, Department of Ecology and Evolutionary Biology, University of Colorado Boulder, Boulder, CO, USA.

Gene copy number (CN) variation is known to be important in nearly every species where it has been examined. Alterations in gene CN may provide a fast way of acquiring diversity, allowing rapid adaptation under strong selective pressures, and may also be a key component of standing genetic variation within species. plants produce a distinguishing set of secondary metabolites, the cannabinoids, many of which have medicinal utility. Read More

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http://dx.doi.org/10.1093/aobpla/plz074DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6986684PMC
December 2019

Effect of simulated warming on the functional traits of plant in Songnen grassland.

AoB Plants 2019 Dec 8;11(6):plz073. Epub 2019 Nov 8.

Key Laboratory of Dryland Agriculture, Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing, P.R. China.

grassland in Northeast China provides a natural laboratory for the investigation of climate change. The response of to experimental warming can provide insight into its regeneration behaviour and the likely composition of future communities under warmer climate. We used MSR-2420 infrared radiators to elevate temperature and examined soil organic carbon and nitrogen and soil total phosphorus and determined the growth and physiology of in response to manipulations of ambient condition and warming. Read More

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http://dx.doi.org/10.1093/aobpla/plz073DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6986685PMC
December 2019

Genet assignment and population structure analysis in a clonal forest-floor herb, , using RAD-seq.

AoB Plants 2020 Feb 20;12(1):plz080. Epub 2019 Dec 20.

Center for Ecological Research, Kyoto University, Hirano Otsu, Japan.

To study the genetic structure of clonal plant populations, genotyping and genet detection using genetic markers are necessary to assign ramets to corresponding genets. Assignment is difficult as it involves setting a robust threshold of genetic distance for genet distinction as neighbouring genets in a plant population are often genetically related. Here, we used restriction site-associated DNA sequencing (RAD-seq) for a rhizomatous clonal herb, [Brassicaceae] to accurately determine genet structure in a natural population. Read More

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http://dx.doi.org/10.1093/aobpla/plz080DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6983914PMC
February 2020

Identification of sex-linked markers in the sexually cryptic coco de mer: are males and females produced in equal proportions?

AoB Plants 2020 Feb 18;12(1):plz079. Epub 2019 Dec 18.

Department of Environmental Systems Science, ETH Zürich, Zürich, Switzerland.

(coco de mer) is a long-lived dioecious palm in which male and female plants are visually indistinguishable when immature, only becoming sexually dimorphic as adults, which in natural forest can take as much as 50 years. Most adult populations in the Seychelles exhibit biased sex ratios, but it is unknown whether this is due to different proportions of male and female plants being produced or to differential mortality. In this study, we developed sex-linked markers in using ddRAD sequencing, enabling us to reliably determine the gender of immature individuals. Read More

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http://dx.doi.org/10.1093/aobpla/plz079DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6964228PMC
February 2020

Continuous variation in herkogamy enhances the reproductive response of to spatial variation in pollinator assemblages.

AoB Plants 2020 Feb 5;12(1):plz078. Epub 2019 Dec 5.

Doñana Biological Station (EBD-CSIC), Sevilla, Spain.

Herkogamy, the spatial separation of sex organs in hermaphroditic plants, has been proposed as a mechanism to reduce self-pollination and the associated processes of inbreeding and gamete wastage. Longitudinal herkogamy is the most frequent type, with two subtypes: approach herkogamy (anthers below the stigma), which is associated with diverse pollinator arrays, and reverse herkogamy (anthers above the stigma), associated with specialized, long-tongued pollinators. By using a herkogamy index that varied continuously from negative (reverse herkogamy) to positive (approach herkogamy) values, we studied the effect of continuous variation in herkogamy on pollinator attraction, selfing capability and plant fitness across three populations of differing in the relative abundance of long-tongued vs. Read More

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http://dx.doi.org/10.1093/aobpla/plz078DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6969618PMC
February 2020

Decrypting tubby-like protein gene family of multiple functions in starch root crop cassava.

AoB Plants 2019 Dec 25;11(6):plz075. Epub 2019 Nov 25.

State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, College of Life Science and Technology, Guangxi University, Nanning, Guangxi, China.

Tubby-like proteins (TLPs) are ubiquitous in eukaryotes and function in abiotic stress tolerance of some plants. Cassava ( Crantz) is a high-yield starch root crop and has a high tolerance to poor soil conditions and abiotic stress. However, little is known about TLP gene characteristics and their expression in cassava. Read More

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http://dx.doi.org/10.1093/aobpla/plz075DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6920310PMC
December 2019

Intrinsic and extrinsic drivers of intraspecific variation in seed dispersal are diverse and pervasive.

AoB Plants 2019 Dec 14;11(6):plz067. Epub 2019 Dec 14.

Penn State University, University Park, PA 16802, USA.

There is growing realization that intraspecific variation in seed dispersal can have important ecological and evolutionary consequences. However, we do not have a good understanding of the drivers or causes of intraspecific variation in dispersal, how strong an effect these drivers have, and how widespread they are across dispersal modes. As a first step to developing a better understanding, we present a broad, but not exhaustive, review of what is known about the drivers of intraspecific variation in seed dispersal, and what remains uncertain. Read More

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http://dx.doi.org/10.1093/aobpla/plz067DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6914678PMC
December 2019

Seed release by a serotinous pine in the absence of fire: implications for invasion into temperate regions.

AoB Plants 2019 Dec 26;11(6):plz077. Epub 2019 Nov 26.

Bio-Protection Research Centre, Lincoln University, Lincoln, Canterbury, New Zealand.

In pines, the release of seeds from serotinous cones is primarily considered a response to the high temperatures of a fire. However, the naturalization of serotinous pines in regions where fires are rare highlights the need to quantify environmental conditions that determine seed release to allow accurate prediction of dispersal and spread risk. We investigated the conditions that break cone serotiny in , a widely planted forestry species that has naturalized in temperate regions worldwide. Read More

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http://dx.doi.org/10.1093/aobpla/plz077DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6900966PMC
December 2019

tealeaves: an R package for modelling leaf temperature using energy budgets.

AoB Plants 2019 Dec 8;11(6):plz054. Epub 2019 Dec 8.

Department of Botany, University of Hawai'i, Honolulu, HI, USA.

Plants must regulate leaf temperature to optimize photosynthesis, control water loss and prevent damage caused by overheating or freezing. Physical models of leaf energy budgets calculate the energy fluxes and leaf temperatures for a given set leaf and environmental parameters. These models can provide deep insight into the variation in leaf form and function, but there are few computational tools available to use these models. Read More

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http://dx.doi.org/10.1093/aobpla/plz054DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6899345PMC
December 2019

: a perennial model system for studying population differentiation and local adaptation.

AoB Plants 2019 Dec 27;11(6):plz076. Epub 2019 Nov 27.

Center for Ecological Research, Kyoto University, Hirano, Otsu, Shiga, Japan.

Local adaptation is assumed to occur when populations differ in a phenotypic trait or a set of traits, and such variation has a genetic basis. Here, we introduce and its life history as a perennial model system to study population differentiation and local adaptation. Studies on altitudinal adaptation have been conducted in two regions: Mt. Read More

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http://dx.doi.org/10.1093/aobpla/plz076DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6899346PMC
December 2019

Seedling responses to salinity of 26 Neotropical tree species.

AoB Plants 2019 Dec 25;11(6):plz062. Epub 2019 Nov 25.

Centro de Biodiversidad y Descubrimiento de Drogas, Instituto de Investigaciones Científicas y Servicios de Alta Tecnología, Ciudad del Saber, Clayton, Panamá, República de Panamá.

Sea-level rise will result in increased salinization of coastal areas. Soil salinity is a major abiotic stress that reduces plant growth, yet tolerance to salinity varies across environmental conditions, habitats and species. To determine salinity tolerance of 26 common tropical tree species from Panama, we measured growth, gas exchange and mortality of 3-month-old seedlings subjected to weekly irrigation treatments using five seawater solutions (0 % = control, 20, 40, 60 and 90 % V/V of seawater) for ~2 months. Read More

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http://dx.doi.org/10.1093/aobpla/plz062DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6876892PMC
December 2019

The risk-takers and -avoiders: germination sensitivity to water stress in an arid zone with unpredictable rainfall.

AoB Plants 2019 Dec 10;11(6):plz066. Epub 2019 Oct 10.

School of Health and Life Sciences, Federation University, Mt Helen, VIC, Australia.

Water availability is a critical driver of population dynamics in arid zones, and plant recruitment is typically episodic in response to rainfall. Understanding species' germination thresholds is key for conservation and restoration initiatives. Thus, we investigated the role of water availability in the germination traits of keystone species in an arid ecosystem with stochastic rainfall. Read More

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http://dx.doi.org/10.1093/aobpla/plz066DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6863470PMC
December 2019

Short-term thermal acclimation of dark respiration is greater in non-photosynthetic than in photosynthetic tissues.

AoB Plants 2019 Dec 2;11(6):plz064. Epub 2019 Oct 2.

Department of Forestry and Natural Resources, Purdue University, West Lafayette, IN, USA.

Thermal acclimation of plant respiration is highly relevant to climate projections; when included in models, it reduces the future rate of atmospheric CO rise. Although all living plant tissues respire, few studies have examined differences in acclimation among tissues, and leaf responses have received greater attention than stems and roots. Here, we examine the short-term temperature acclimation of leaf, stem and root respiration within individuals of eight disparate species acclimated to five temperatures, ranging from 15 to 35 °C. Read More

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http://dx.doi.org/10.1093/aobpla/plz064DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6863468PMC
December 2019

Stem and leaf growth rates define the leaf size vs. number trade-off.

AoB Plants 2019 Dec 19;11(6):plz063. Epub 2019 Nov 19.

Fujian Provincial Key Laboratory of Plant Ecophysiology, Fujian Normal University, Fuzhou, Fujian Province, China.

The trade-off between leaf number and individual leaf size on current-year shoots (twigs) is crucial to light interception and thus net carbon gain. However, a theoretical basis for understanding this trade-off remains elusive. Here, we argue that this trade-off emerges directly from the relationship between annual growth in leaf and stem mass, a hypothesis that predicts that maximum individual leaf size (i. Read More

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http://dx.doi.org/10.1093/aobpla/plz063DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6863467PMC
December 2019

Insights from invasion ecology: Can consideration of eco-evolutionary experience promote benefits from root mutualisms in plant production?

AoB Plants 2019 Dec 23;11(6):plz060. Epub 2019 Sep 23.

Institute of Life Sciences, Scuola Superiore Sant'Anna, Pisa, Italy.

Mutualistic plant-microbial functioning relies on co-adapted symbiotic partners as well as conducive environmental conditions. Choosing particular plant genotypes for domestication and subsequent cultivar selection can narrow the gene pools of crop plants to a degree that they are no longer able to benefit from microbial mutualists. Elevated mineral nutrient levels in cultivated soils also reduce the dependence of crops on nutritional support by mutualists such as mycorrhizal fungi and rhizobia. Read More

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http://dx.doi.org/10.1093/aobpla/plz060DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6863469PMC
December 2019

Comparative transcriptome, physiological and biochemical analyses reveal response mechanism mediated by and in enhancing cold stress tolerance in .

AoB Plants 2019 Dec 9;11(6):plz045. Epub 2019 Aug 9.

State Key Laboratory of Cotton Biology /Institute of Cotton Research, Chinese Academy of Agricultural Science, Anyang, Henan, China.

Low temperature is one of the key environmental stresses that impair plant growth and significantly restricts the productivity and spatial distribution of crop plants. , a wild diploid cotton species, has adapted to a wide range of temperatures and exhibits a better tolerance to chilling stress. Here, we compared phenotypes and physiochemical changes in under cold stress and found this species indeed showed better cold tolerance. Read More

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http://dx.doi.org/10.1093/aobpla/plz045DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6863471PMC
December 2019
1.743 Impact Factor

Ovule and seed production patterns in relation to flower size variations in actinomorphic and zygomorphic flower species.

AoB Plants 2019 Oct 23;11(5):plz061. Epub 2019 Sep 23.

Graduate School of Life Sciences, Tohoku University, Aoba, Sendai, Japan.

Zygomorphic flower species tend to show lower flower size variation than actinomorphic flower species. Have these differences also brought an association in ovule and seed production that has arisen due to natural selection in these species? Flowers were collected from 29 actinomorphic and 20 zygomorphic flower species, and fruits were collected from 21 actinomorphic and 14 zygomorphic flower species in Miyagi and Aomori prefectures, in Japan. The coefficient of variations (CVs) of flower sizes, mean ovule sizes of flowers, ovule numbers of flowers and mean seed sizes of fruits were calculated. Read More

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http://dx.doi.org/10.1093/aobpla/plz061DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6804480PMC
October 2019

Six co-occurring conifer species in northern Idaho exhibit a continuum of hydraulic strategies during an extreme drought year.

AoB Plants 2019 Oct 23;11(5):plz056. Epub 2019 Sep 23.

Warnell School of Forestry and Natural Resources, University of Georgia, Athens, GA, USA.

As growing seasons in the northwestern USA lengthen, on track with climate predictions, the mixed conifer forests that dominate this region will experience extended seasonal drought conditions. The year of 2015, which had the most extreme drought for the area on record, offered a potential analogue of future conditions. During this period, we measured the daily courses of water potential and gas exchange as well as the hydraulic conductivity and vulnerability to embolism of six dominant native conifer species, , , , , and , to determine their responses to 5 months of record-low precipitation. Read More

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http://dx.doi.org/10.1093/aobpla/plz056DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6804486PMC
October 2019

Interaction of stomatal behaviour and vulnerability to xylem cavitation determines the drought response of three temperate tree species.

AoB Plants 2019 Oct 23;11(5):plz058. Epub 2019 Sep 23.

Institute of New Forestry Technology, Chinese Academy of Forestry, Beijing, China.

How the mortality and growth of tree species vary with the iso-anisohydric continuum and xylem vulnerability is still being debated. We conducted a precipitation reduction experiment to create a mild drought condition in a forest in the Baotianman Mountains, China, a sub-humid region. Three main sub-canopy tree species in this region were examined. Read More

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http://dx.doi.org/10.1093/aobpla/plz058DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6802943PMC
October 2019

The role of ultraviolet reflectance and pattern in the pollination system of (Hypoxidaceae).

AoB Plants 2019 Oct 23;11(5):plz057. Epub 2019 Sep 23.

Department of Ecology, Faculty of Science, Charles University, Viničná 7, 12844 Prague, Czechia.

Apart from floral morphology and colours perceived by the human eye, ultraviolet (UV) reflectance acts as an important visual advertisement of numerous flowering plant species for pollinators. However, the effect of UV signalling on attracting pollinators of particular plant species is still insufficiently studied, especially in the Afrotropics. Therefore, we studied the pollination system of in montane grasslands of Mount Cameroon, West/Central Africa. Read More

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http://dx.doi.org/10.1093/aobpla/plz057DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6803167PMC
October 2019

Soil chemistry, and not short-term (1-2 year) deer exclusion, explains understory plant occupancy in forests affected by acid deposition.

AoB Plants 2019 Oct 9;11(5):plz044. Epub 2019 Aug 9.

Department of Conservation and Natural Resources, Bureau of Forestry, Harrisburg, PA, USA.

The loss of species diversity and plant community structure throughout the temperate deciduous forests of North America have often been attributed to overbrowsing by white-tailed deer (). Slow species recovery following removal from browsing, or reduction in deer density, has been termed a legacy effect of past deer herbivory. However, vegetation legacy effects have also coincided with changes to soil chemistry throughout the north-eastern USA. Read More

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http://dx.doi.org/10.1093/aobpla/plz044DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6799995PMC
October 2019

Drivers of the relative richness of naturalized and invasive plant species on Earth.

AoB Plants 2019 Oct 4;11(5):plz051. Epub 2019 Sep 4.

German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Leipzig, Germany.

Biological invasions are a defining feature of the Anthropocene, but the factors that determine the spatially uneven distribution of alien plant species are still poorly understood. Here, we present the first global analysis of the effects of biogeographic factors, the physical environment and socio-economy on the richness of naturalized and invasive alien plants. We used generalized linear mixed-effects models and variation partitioning to disentangle the relative importance of individual factors, and, more broadly, of biogeography, physical environment and socio-economy. Read More

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http://dx.doi.org/10.1093/aobpla/plz051DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6795282PMC
October 2019
5 Reads

Biochemical and physiological flexibility accompanies reduced cellulose biosynthesis in Brachypodium .

AoB Plants 2019 Oct 13;11(5):plz041. Epub 2019 Jul 13.

Department of Horticulture, University of Kentucky, Lexington, KY, USA.

Here, we present a study into the mechanisms of primary cell wall cellulose formation in grasses, using the model cereal grass . The exon found adjacent to the Bd glycosyltransferase QXXRW motif was targeted using Targeting Induced Local Lesions in Genomes (TILLING) and sequencing candidate amplicons in multiple parallel reactions (SCAMPRing) leading to the identification of the Bd allele. Plants carrying this missense mutation exhibited a significant reduction in crystalline cellulose content in tissues that rely on the primary cell wall for biomechanical support. Read More

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http://dx.doi.org/10.1093/aobpla/plz041DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6795283PMC
October 2019

Associations between genomic ancestry, genome size and capitula morphology in the invasive meadow knapweed hybrid complex () in eastern North America.

AoB Plants 2019 Oct 23;11(5):plz055. Epub 2019 Aug 23.

University of Vermont, Department of Plant Biology, Burlington, VT, USA.

Plant invasions are prime opportunities for studying hybridization and the nature of species boundaries, but hybrids also complicate the taxonomic treatment and management of introduced taxa. In this study, we use population genomics to estimate the extent of genomic admixture and test for its association with morphology and genome size in a hybrid complex of knapweeds invasive to North America: meadow knapweed ( × ) and its parental species ( and ). We sampled 20 populations from New York and Vermont, USA, and used genotyping by sequencing to identify single nucleotide polymorphisms in order to estimate genome-wide ancestry and classify individuals into hybrid genotype classes. Read More

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http://dx.doi.org/10.1093/aobpla/plz055DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6790064PMC
October 2019

Extracts from cultures of induce defensive patterns of gene expression and enzyme activity while depressing visible injury and reactive oxygen species in challenged with pathogenic .

AoB Plants 2019 Oct 29;11(5):plz049. Epub 2019 Jul 29.

Plant Physiology, Pharmaceutical and Health Sciences Department, Faculty of Pharmacy, Universidad San Pablo-CEU Universities, Boadilla del Monte, Spain.

We evaluated the ability of metabolic elicitors extracted from N21.4 to induce systemic resistance (ISR) in against the pathogen DC3000. Metabolic elicitors were obtained from bacteria-free culture medium with -hexane, ethyl acetate and -butanol in three consecutive extractions. Read More

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http://dx.doi.org/10.1093/aobpla/plz049DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6794073PMC
October 2019

Evaluation of rice grain yield and yield components of Nona Bokra chromosome segment substitution lines with the genetic background of Koshihikari, in a saline paddy field.

AoB Plants 2019 Oct 13;11(5):plz040. Epub 2019 Jul 13.

Graduate School of Bioagricultural Sciences, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Japan.

The ability to tolerate salt differs with the growth stages of rice and thus the yield components that are determined during various growth stages, are differentially affected by salt stress. In this study, we utilized chromosome segment substitution lines (CSSLs) from Nona Bokra, a salt-tolerant landrace, with the genetic background of Koshihikari, a salt-susceptible variety. These were screened to find superior CSSLs under long-term saline conditions that showed higher grain yield and yield components in comparison to Koshihikari. Read More

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http://dx.doi.org/10.1093/aobpla/plz040DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6790112PMC
October 2019

The total dispersal kernel: a review and future directions.

AoB Plants 2019 Oct 3;11(5):plz042. Epub 2019 Sep 3.

Department of Biology, University of Maryland, College Park, MD, USA.

The distribution and abundance of plants across the world depends in part on their ability to move, which is commonly characterized by a dispersal kernel. For seeds, the total dispersal kernel (TDK) describes the combined influence of all primary, secondary and higher-order dispersal vectors on the overall dispersal kernel for a plant individual, population, species or community. Understanding the role of each vector within the TDK, and their combined influence on the TDK, is critically important for being able to predict plant responses to a changing biotic or abiotic environment. Read More

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http://dx.doi.org/10.1093/aobpla/plz042DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6757349PMC
October 2019
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Domestication influences morphological and physiological responses to salinity in seedlings.

AoB Plants 2019 Oct 9;11(5):plz046. Epub 2019 Aug 9.

Department of Functional Biology, Faculty of Biology, University of Santiago de Compostela, Santiago de Compostela, Spain.

cultivars include important vegetable and forage crops grown worldwide, whereas the wild counterpart occurs naturally on European sea cliffs. Domestication and selection processes have led to phenotypic and genetic divergence between domesticated plants and their wild ancestors that inhabit coastal areas and are exposed to saline conditions. Salinity is one of the most limiting factors for crop production. Read More

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http://dx.doi.org/10.1093/aobpla/plz046DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6757351PMC
October 2019

The defensive benefit and flower number cost of selenium accumulation in .

AoB Plants 2019 Oct 17;11(5):plz053. Epub 2019 Aug 17.

New Horizons Governor's School for Science and Technology Hampton, VA, USA.

Some plant species accumulate selenium in their tissues in quantities far above soil concentrations, and experiments demonstrate that selenium can serve as a defence against herbivores and pathogens. However, selenium may also cause oxidative stress and reduce growth in plants. We measured growth, selenium accumulation and herbivory in four varieties of the selenium accumulator to investigate the cost of accumulation as well as its benefit in reducing herbivory. Read More

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http://dx.doi.org/10.1093/aobpla/plz053DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6757350PMC
October 2019

Accurate position exchange of stamen and stigma by movement in opposite direction resolves the herkogamy dilemma in a protandrous plant, (Labiatae).

AoB Plants 2019 Oct 17;11(5):plz052. Epub 2019 Aug 17.

CAS Key Laboratory of Aquatic Botany and Watershed Ecology, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan, China.

Herkogamy is an effective way to reduce sexual interference. However, the separation of stigma and anther potentially leads to a conflict because the pollen may be placed in a location on the pollinator different from the point of stigma contact, which can reduce pollination accuracy. Floral mechanisms aiming to resolve this conflict have seldom been explored. Read More

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http://dx.doi.org/10.1093/aobpla/plz052DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6757348PMC
October 2019

Deacclimation kinetics as a quantitative phenotype for delineating the dormancy transition and thermal efficiency for budbreak in species.

AoB Plants 2018 Oct 11;10(5):ply066. Epub 2018 Oct 11.

School of Integrative Plant Science - Horticulture Section, Cornell University-New York State Agricultural Experiment Station, Geneva, NY, USA.

Bud dormancy and cold hardiness are critical adaptations for surviving winter cold stress for temperate perennial plant species. In grapevine, acquisition of cold hardiness requires dormancy induction in the early winter and careful maintenance of dormancy state throughout winter. With sufficient exposure to low, non-freezing temperatures (chilling requirement), grapevine buds transition between early (endodormant) and late winter (ecodormant) states. Read More

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http://dx.doi.org/10.1093/aobpla/ply066DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6207836PMC
October 2018
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Climate change, snow mold and the invasion: mixed evidence for release from cold weather pathogens.

AoB Plants 2019 Oct 16;11(5):plz043. Epub 2019 Jul 16.

Department of Wildland Resources and the Ecology Center, Utah State University, Logan, UT, USA.

Climate change is reducing the depth and duration of winter snowpack, leading to dramatic changes in the soil environment with potentially important ecological consequences. Previous experiments in the Intermountain West of North America indicated that loss of snowpack increases survival and population growth rates of the invasive annual grass ; however, the underlying mechanism is unknown. We hypothesized that reduced snowpack might promote population growth by decreasing damage from snow molds, a group of subnivean fungal pathogens. Read More

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http://dx.doi.org/10.1093/aobpla/plz043DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6756605PMC
October 2019

Avoiding sexual interference: herkogamy and dichogamy in style dimorphic flowers of (Amaryllidaceae).

AoB Plants 2019 Aug 9;11(4):plz038. Epub 2019 Aug 9.

Departamento de Biología Vegetal y Ecología, Universidad de Sevilla, apartado, Sevilla, Spain.

Spatial (herkogamy) or temporal (dichogamy) separation of sex organs are mechanisms considered to restrict self-pollination and promote outcrossing. Additionally, avoidance of self-interference is proposed to be the driving force for the evolution of these mechanisms, particularly in self-incompatible species. However, species with anthers and stigmas at different levels may increase the rate of imprecise pollen transfer, resulting in pollen discounting. Read More

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http://dx.doi.org/10.1093/aobpla/plz038DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6735907PMC

Dormancy and endosperm presence influence the conservation potential in central European calcareous grassland plants.

AoB Plants 2019 Aug 25;11(4):plz035. Epub 2019 Jun 25.

Ecology and Conservation Biology, Institute of Plant Sciences, Faculty of Biology and Preclinical Sciences, University of Regensburg, Universitätsstrasse, Regensburg, Germany.

The preservation of plant species under conditions in seed banks strongly depends on seed longevity. However, detailed knowledge on this seed ecological aspect is limited and comparative studies from central European habitats are scarce. Therefore, we investigated the seed longevity of 39 calcareous grassland species in order to assess the prospects of storage of seeds originating from a single, strongly threatened habitat. Read More

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http://dx.doi.org/10.1093/aobpla/plz035DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6735842PMC

How diverse can rare species be on the margins of genera distribution?

AoB Plants 2019 Aug 9;11(4):plz037. Epub 2019 Jul 9.

Laboratory of Molecular Evolution, Department of Genetics, Universidade Federal do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil.

Different genetic patterns have been demonstrated for narrowly distributed taxa, many of them linking rarity to evolutionary history. Quite a few species in young genera are endemics and have several populations that present low variability, sometimes attributed to geographical isolation or dispersion processes. Assessing the genetic diversity and structure of such species may be important for protecting them and understanding their diversification history. Read More

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http://dx.doi.org/10.1093/aobpla/plz037DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6677564PMC

Consequences of intraspecific variation in seed dispersal for plant demography, communities, evolution and global change.

AoB Plants 2019 Aug 21;11(4):plz016. Epub 2019 Mar 21.

Department of Wildland Resources and Ecology Center, Utah State University, Logan, UT, USA.

As the single opportunity for plants to move, seed dispersal has an important impact on plant fitness, species distributions and patterns of biodiversity. However, models that predict dynamics such as risk of extinction, range shifts and biodiversity loss tend to rely on the mean value of parameters and rarely incorporate realistic dispersal mechanisms. By focusing on the mean population value, variation among individuals or variability caused by complex spatial and temporal dynamics is ignored. Read More

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http://dx.doi.org/10.1093/aobpla/plz016DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6644487PMC
August 2019
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increases boron uptake and inhibits rapeseed growth under boron supply irrespective of phosphorus fertilization.

AoB Plants 2019 Aug 26;11(4):plz036. Epub 2019 Jun 26.

State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, China.

The present study was carried out to investigate how plant growth-promoting bacteria (PGPB) influence plant growth and uptake of boron (B) and phosphorus (P) in rapeseed (). Rapeseed was subjected to control, B, P and B + P treatments, either with or without (PGPB) inoculation, and grown in pot culture for 6 weeks. In the absence of , the addition of B, P or both elements improved the growth of rapeseed compared with the control. Read More

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http://dx.doi.org/10.1093/aobpla/plz036DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6626985PMC
August 2019
1 Read