1,065,621 results match your criteria Plant Poisoning Glycosides - Coumarin


Retraction.

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J Integr Plant Biol 2019 Mar 20;61(3):377. Epub 2019 Feb 20.

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http://dx.doi.org/10.1111/jipb.12783DOI Listing

Theoretical chemical ionization rate constants of the concurrent reactions of hydronium ions (H O ) and oxygen ions (O ) with selected organic iodides.

J Mass Spectrom 2019 Mar 18. Epub 2019 Mar 18.

Aix-Marseille Univ, CNRS, LCE, Marseille, France.

Short chain volatile iodinated organic compounds (VIOCs) are of great importance in many fields that include atmospheric chemistry, agriculture and environmental chemistry related to nuclear power plant safety. Proton-transfer-reaction mass spectrometry (PTR-MS) allows for fast, sensitive and on-line quantification of VIOCs if the chemical ionization (CI) reaction rate constants are known. In this work, the theoretical CI collision rates for the reactions of hydronium ions (H O ) and oxygen ions ( ) with selected atmospherically relevant short chain VIOCs are calculated. Read More

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http://dx.doi.org/10.1002/jms.4349DOI Listing

The efficacy of zero valent iron-sand filtration on the reduction of Escherichia coli and Listeria monocytogenes in surface water for use in irrigation.

Environ Res 2019 Feb 19;173:33-39. Epub 2019 Feb 19.

Department of Animal and Food Science, University of Delaware, Newark, DE, USA. Electronic address:

The use of surface and recycled water sources for irrigation can reduce demand on critical groundwater resources. Treatment or mitigation may be necessary for the use of these alternative water sources in order to reduce risk associated with microbial pathogens present in the water. In this study, the efficacy of a zero-valent iron (ZVI) sand filter was assessed for the reduction of Listeria monocytogenes and Escherichia coli in surface water. Read More

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http://dx.doi.org/10.1016/j.envres.2019.02.028DOI Listing
February 2019

Nickel oxide nanoparticles cause substantial physiological, phytochemical, and molecular-level changes in Chinese cabbage seedlings.

Plant Physiol Biochem 2019 Mar 12;139:92-101. Epub 2019 Mar 12.

Department of Applied Bioscience, College of Life and Environmental Sciences, Konkuk University, Seoul 05029, Republic of Korea. Electronic address:

Nickel oxide nanoparticles (NiO NPs) are utilized in various industries and their release into the environment may lead to the pollution of agricultural areas. However, assessing the toxicity of NiO NPs in major food crops is difficult due to the limited information available on their toxicity. The present investigation was carried out to evaluate how NiO NPs affect plant growth, photosynthetic efficiency, and phytochemical content, as well as changes at the transcriptional level of these phytochemicals in Chinese cabbage seedlings. Read More

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http://dx.doi.org/10.1016/j.plaphy.2019.03.010DOI Listing

Identifying the metabolomics and physiological differences among Soja in the early flowering stage.

Plant Physiol Biochem 2019 Mar 12;139:82-91. Epub 2019 Mar 12.

Institute of Grassland Science, Northeast Normal University, Key Laboratory of Vegetation Ecology, Ministry of Education, Changchun, 130024, PR China. Electronic address:

Wild soybean (Glycine soja) and cultivated soybean (Glycine max) belong to the subgenus Soja. We investigated the photosynthetic activity, mineral nutrition and metabolomics of the salt-tolerant wild soybean (W2), salt-sensitive wild soybean (W1) and cultivated soybean (C) in the early flowering stage, with a focus on the physiological and cellular metabolism-related differences among Soja to reveal the adaptive mechanisms. The photosynthetic activity of W2 was greater than that of W1 and the Mg, Zn, Mo, Mn and B contents showed the same trend. Read More

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http://dx.doi.org/10.1016/j.plaphy.2019.03.012DOI Listing

Growth, physiological function, and antioxidant defense system responses of Lemna minor L. to decabromodiphenyl ether (BDE-209) induced phytotoxicity.

Plant Physiol Biochem 2019 Mar 13;139:113-120. Epub 2019 Mar 13.

College of Biology and the Environment, Joint Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing, 210037, PR China. Electronic address:

Polybrominated diphenyl ethers (PBDEs), represent one of the new types of persistent organic pollutants (POPs) that are currently found in ambient aquatic ecosystems. Lemna minor L. is a floating freshwater plant, which is widely employed for phytotoxicity studies of xenobiotic substances. Read More

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http://dx.doi.org/10.1016/j.plaphy.2019.03.018DOI Listing

Comparative analyses of cuticular waxes on various organs of faba bean (Vicia faba L.).

Plant Physiol Biochem 2019 Mar 12;139:102-112. Epub 2019 Mar 12.

College of Agronomy and Biotechnology, Southwest University, Chongqing, 400716, China. Electronic address:

Cuticular waxes cover the plant surface and serve as hydrophobic layer, exhibiting various wax profiles between plant species and plant organs. This paper reports comprehensive analysis of the waxes on organs exposed to air, including leaf, stem, pod pericarp, and petals (banner, wing and keel), and on seed coat enwrapped in pod pericarp of faba bean (Vicia faba). In total 7 classes of wax compounds were identified, including fatty acids, primary alcohols, alkyl esters, aldehydes, alkanes, cinnamyl alcohol esters, and alkylresorcinols. Read More

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http://dx.doi.org/10.1016/j.plaphy.2019.03.015DOI Listing

Engineering nanocellulose hydrogels for biomedical applications.

Adv Colloid Interface Sci 2019 Mar 8;267:47-61. Epub 2019 Mar 8.

Bioresource Processing Research Institute of Australia (BioPRIA), Department of Chemical Engineering, Monash University, VIC 3800, Australia. Electronic address:

Nanocellulose hydrogels are highly hydrated porous cellulosic soft materials with good mechanical properties. These cellulose-based gels can be produced from bacterial or plant cellulose nanofibrils, which are hydrophilic, renewable, biodegradable and biocompatible. Nanocellulose, whether fibrils (CNF), crystals (CNC) or bacterial (BNC), has a high aspect ratio and surface area, and can be chemically modified with functional groups or by grafting biomolecules. Read More

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http://dx.doi.org/10.1016/j.cis.2019.03.002DOI Listing

'Candidatus Liberibacter asiaticus' peroxiredoxin (LasBCP) suppresses oxylipin-mediated defense signaling in citrus.

J Plant Physiol 2019 Mar 5;236:61-65. Epub 2019 Mar 5.

Department of Plant Pathology, University of Florida, Gainesville, FL 32611, USA. Electronic address:

The Lasbcp (CLIBASIA_RS00445) 1-Cys peroxiredoxin gene is conserved among all 13 sequenced strains of Candidatus Liberibacter asiaticus, the causal agent of Huanglongbing or "citrus greening" disease. LasBCP was previously characterized as a secreted peroxiredoxin with substrate specificity for organic peroxides, and as a potential pathogenicity effector. Agrobacterium-mediated transient expression of LasBCP in citrus leaves provided significant protection against peroxidation of free and membrane-bound lipids, thereby preserving the molecular integrity of the chlorophyll apparatus and reducing accumulation of lipid peroxidation products (oxylipins) following exposure to tert-butyl hydroperoxide (tBOOH, an organic peroxide). Read More

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http://dx.doi.org/10.1016/j.jplph.2019.03.001DOI Listing

Tyrosinase-immobilized CNT based biosensor for highly-sensitive detection of phenolic compounds.

Biosens Bioelectron 2019 Mar 7;132:279-285. Epub 2019 Mar 7.

Department of Chemical and Biological Engineering, Korea University, Seoul 02841, Republic of Korea. Electronic address:

Highly sensitive phenol biosensor was developed by using well-dispersed carbon nanotubes (CNTs) in enzyme solution and adding CNTs in enzyme electrodes. First, the intact CNTs were dispersed in aqueous tyrosinase (TYR) solution, and TYR molecules were precipitated and crosslinked to prepare the sample of enzyme adsorption, precipitation and crosslinking (EAPC). EAPC exhibited 10. Read More

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http://dx.doi.org/10.1016/j.bios.2019.03.008DOI Listing

Sesquiterpenes from Curcuma zedoaria rhizomes and their cytotoxicity against human gastric cancer AGS cells.

Bioorg Chem 2019 Mar 9;87:117-122. Epub 2019 Mar 9.

School of Pharmacy, Sungkyunkwan University, Suwon 16419, Republic of Korea. Electronic address:

Curcuma zedoaria rhizome (Zingiberaceae) is a well-known traditional medicinal plant used in Ayurvedic and traditional Chinese medicine to treat various cancers. This study aimed to identify the cytotoxic components from C. zedoaria rhizomes that act against gastric cancer, which is the third leading cause of death from cancer worldwide because the MeOH extract of C. Read More

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http://dx.doi.org/10.1016/j.bioorg.2019.03.015DOI Listing

Enhanced Cd transport in the soil-plant-atmosphere continuum (SPAC) system by tobacco (Nicotiana tabacum L.).

Chemosphere 2019 Mar 6;225:395-405. Epub 2019 Mar 6.

Key Laboratory of Water Cycle and Related Land Surface Processes, Institute of Geographic Science and Natural Resources Research, Chinese Academy of Science, Beijing, 100101, China; School of Renewable Energy, North China Electric Power University, Beijing, 102206, China. Electronic address:

The optimal treatment designs of the heavy metal pollution sites and the calculation of the recovery capacity are important in recent studies. In this paper, we aimed to model the accumulation of heavy metals under different artificially Cd concentrations, and analyzed the various tobacco solute adsorption and fluid flow properties. The finite difference method was used to simulate the heavy metals flux and root absorption in the soil, and the model simulation was compared with the measured values to quantify the uncertainty of the metal transport and modeling parameters. Read More

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http://dx.doi.org/10.1016/j.chemosphere.2019.03.021DOI Listing

U and radiocesium in river bank soil and river sediment in Fukushima Prefecture, after the Fukushima Daiichi Nuclear Power Plant accident.

Chemosphere 2019 Mar 12;225:388-394. Epub 2019 Mar 12.

Institute of Radiation Emergency Medicine, Hirosaki University, 66-1 Hon-cho, Hirosaki, Aomori, 036-8564, Japan. Electronic address:

Almost 8 years after the Japanese Fukushima Daiichi Nuclear Power Plant (FDNPP) accident, data for U and U/U have mainly remained limited to only a few heavily contaminated samples. In the present study, activities of U, Cs, and Cs, along with U, U, U, in 15 river bank soil and 10 river sediment samples, were measured by ICP-MS/MS and γ spectrometry. The Cs activities and Cs/Cs activity ratios (decay-corrected to March 11, 2011) in these 15 river bank soil samples were from 74. Read More

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http://dx.doi.org/10.1016/j.chemosphere.2019.03.061DOI Listing

Mass-balance-model-based evaluation of sewage treatment plant contribution to residual pharmaceuticals in environmental waters.

Chemosphere 2019 Mar 11;225:378-387. Epub 2019 Mar 11.

Department of Environmental Engineering, University of Seoul, 163 Seoulsiripdaero, Dongdaemun-gu, Seoul, 02504, South Korea. Electronic address:

In this study, a total of 52 pharmaceuticals in the influent and effluent of two sewage treatment plants (STPs) and in the receiving waters were quantified with an analytical method using on-line solid phase extraction coupled to liquid chromatograph-tandem mass spectrometry. 36 out of the 52 pharmaceuticals were detected in the influent and effluent of the STPs at quantifiable levels; influent and effluent concentrations ranged 1 ng L to 30 μg L and 3 ng L to 3 μg L, respectively. They were also detected from the receiving waters (both tributaries and main river); their concentrations ranged from 1 to 310 ng L. Read More

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http://dx.doi.org/10.1016/j.chemosphere.2019.03.046DOI Listing

Dual behavior of selenium: Insights into physio-biochemical, anatomical and molecular analyses of four Brassica napus cultivars.

Chemosphere 2019 Mar 8;225:329-341. Epub 2019 Mar 8.

Institute of Crop Science and Zhejiang Key Laboratory of Crop Germplasm, Zhejiang University, Hangzhou, 310058, China. Electronic address:

Selenium (Se) is a prerequisite metalloid for humans and animals. But, its essentialness or phytotoxicity is still obscure. Here, we investigated the dual effects of sodium selenite (0, 25, 50 or 100 μM) on the physio-biochemical, anatomical and molecular alterations in different Brassicca napus L. Read More

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http://dx.doi.org/10.1016/j.chemosphere.2019.03.028DOI Listing

Photoprotection assessment of olive (Olea europaea L.) leaves extract standardized to oleuropein: In vitro and in silico approach for improved sunscreens.

J Photochem Photobiol B 2019 Mar 13;193:162-171. Epub 2019 Mar 13.

Laboratório de Planejamento Farmacêutico e Simulação Computacional (LaPFarSC), Faculdade de Farmácia, CCS, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21949-900, Brazil; Laboratório de Microbiologia e Avaliação Genotóxica (LAMIAG), Faculdade de Farmácia, CCS, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21949-900, Brazil. Electronic address:

Olive leaves contain higher amount of polyphenols than olive oil and represent a waste product from olive harvest and pruning of olive trees. The most abundant compound in olive leaves is oleuropein. Benefits of the topical application of olive leaves extract were previously reported, but little information is available on its photoprotective potential and the result of the association of this extract with organic UV filters in topical sunscreen formulations. Read More

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http://dx.doi.org/10.1016/j.jphotobiol.2019.03.003DOI Listing

The remediation of drought stress under VAM inoculation through proline chemical transformation action.

J Photochem Photobiol B 2019 Mar 11;193:155-161. Epub 2019 Mar 11.

Department of Botany, University of Karachi, 75270, Pakistan.

This article discussed the enhanced drought tolerance under arbuscular mycorrhizal (AM) inoculation and normal growth of plants which linked with the activity of photoreceptors. The photoreceptor action in dual symbiosis under drought stress showed not only the high photosynthetic activity but also provide information about the broad range of physiological responses. The pot experiment conducted in a natural environment where drought condition was observed twice a week via regular irrigation with water up to twelve months. Read More

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http://dx.doi.org/10.1016/j.jphotobiol.2019.03.002DOI Listing

Blood and bone lead levels in South Africa's Gyps vultures: Risk to nest-bound chicks and comparison with other avian taxa.

Sci Total Environ 2019 Mar 9;669:471-480. Epub 2019 Mar 9.

DST-NRF Centre of Excellence at the FitzPatrick Institute, Department of Zoology and Entomology, University of Pretoria, Private Bag X20, Hatfield, Pretoria 0028, South Africa; National Zoological Garden, South African National Biodiversity Institute, P O Box 754, Pretoria 0001, South Africa. Electronic address:

Poisoning, including secondary lead poisoning, is cited as the single most important cause of vulture mortalities in Africa. To evaluate the prevalence of lead poisoning among South Africa's Gyps vultures compared to other, non-scavenging birds, we obtained blood and bone samples from Cape (Gyps coprotheres) and White-backed (G. africanus) vultures. Read More

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http://dx.doi.org/10.1016/j.scitotenv.2019.03.123DOI Listing

Uptake, translocation and phytotoxicity of antimonite in wheat (Triticum aestivum).

Sci Total Environ 2019 Mar 11;669:421-430. Epub 2019 Mar 11.

State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, PR China.

Antimony (Sb) contamination of soils and its potential negative impact on crop yields have been recently recognized. To explore the effects of Sb(III) on wheat, responses of physical growth properties, enzyme activities and gene expression were examined. The root length was the most relevant indicator to exposure concentration, the root fresh weight was the most sensitive endpoint according to the comparison of the EC (50% inhibitory effect concentration) values, and NRAMP1 gene expression at 1 mg L was more sensitive than other genes. Read More

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http://dx.doi.org/10.1016/j.scitotenv.2019.03.145DOI Listing

Differential toxicity of the UV-filters BP-3 and BP-4 in Chlamydomonas reinhardtii: A flow cytometric approach.

Sci Total Environ 2019 Mar 9;669:412-420. Epub 2019 Mar 9.

Laboratorio de Microbiología, Facultad de Ciencias, Universidad de A Coruña, Campus de A Zapateira s/n, 15071 A Coruña, Spain.

Due to the concern about the negative effects of exposure to sunlight, UV-filters are being introduced in all kind of cosmetic formulas. Wastewater treatment plants are not able to remove and/or degrade them; consequently they find their way into rivers, lakes and oceans. These chemicals are acquiring a concerning status due to their increasingly common use and the potential risk for the environment. Read More

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http://dx.doi.org/10.1016/j.scitotenv.2019.03.116DOI Listing

Systematized biosynthesis and catabolism regulate citrulline accumulation in watermelon.

Phytochemistry 2019 Mar 15;162:129-140. Epub 2019 Mar 15.

Southwest Texas Junior College, Uvalde, TX, 78801, USA.

Citrulline, a non-protein amino acid, is present in large amounts in watermelon (Citrullus lanatus (Thunb.) Matsum. & Nakai Cucurbitaceae) fruits. Read More

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http://dx.doi.org/10.1016/j.phytochem.2019.03.003DOI Listing

Characterization of a sesquiterpene cyclase from the glandular trichomes of Leucosceptrum canum for sole production of cedrol in Escherichia coli and Nicotiana benthamiana.

Phytochemistry 2019 Mar 15;162:121-128. Epub 2019 Mar 15.

State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, PR China; Yunnan Key Laboratory of Natural Medicinal Chemistry, Kunming, 650201, PR China. Electronic address:

Cedrol is an extremely versatile sesquiterpene alcohol that was approved by the Food and Drug Administration of the United States as a flavoring agent or adjuvant and has been commonly used as a flavoring ingredient in cosmetics, foods and medicine. Furthermore, cedrol possesses a wide range of pharmacological properties including sedative, anti-inflammatory and cytotoxic activities. Commercial production of cedrol relies on fractional distillation of cedar wood oils, followed by recrystallization, and little has been reported about its biosynthesis and aspects of synthetic biology. Read More

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http://dx.doi.org/10.1016/j.phytochem.2019.03.009DOI Listing

MD Simulation Investigation on the Binding Process of Smoke-derived Germination Stimulants to Its Receptor.

J Chem Inf Model 2019 Mar 18. Epub 2019 Mar 18.

Karrikins (KARs) are a class of smoke-derived seed germination stimulants with great significance in both the agriculture and plant biology. By means of direct binding to the receptor protein KAI2, the compounds can initiate the KARs signal transduction pathway, hence triggering germination of the dormant seeds in the soil. In the research, several molecular dynamics (MD) simulation techniques were properly integrated to investigate the binding process of KAR1 to KAI2 and reveal the details of the whole binding event. Read More

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http://dx.doi.org/10.1021/acs.jcim.8b00844DOI Listing

Bio-Inspired Slippery Cone for Controllable Manipulation of Gas Bubbles in Low-Surface-Tension Environment.

ACS Nano 2019 Mar 18. Epub 2019 Mar 18.

Manipulating bubbles in surfactant solutions or oil mediums is of vital importance in daily life and industries concerning with cosmetics, food, fermentation, mineral flotation, etc. However, realizing controllable regulation of bubble's behavior is quite challenging in low-surface-tension aqueous environment, which is mainly attributed to the strong affinity of liquid molecules to solid surface to prevent the efficient interaction of gas bubble with solid surface. To address these issues, herein, we have taken inspirations from cactus spine and Pitcher plant to develop the slippery copper cone (SCC), which can facilely manipulate gas bubble in surfactant solutions (as low as ~ 29. Read More

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http://dx.doi.org/10.1021/acsnano.8b08480DOI Listing

Prevalence of bee viruses in Apis cerana cerana populations from different locations in the Fujian Province of China.

Microbiologyopen 2019 Mar 18:e830. Epub 2019 Mar 18.

College of Bee Science, Fujian Agriculture and Forestry University, Fuzhou, China.

Prevalence of honeybee viral diseases has recently been causing major problems in the beekeeping industry, causing economic losses worldwide. Honeybees are susceptible to a variety of diseases and various pathogens. Among these pathogens, prevalence viruses, along with other factors, are seriously threatening the health of bee species. Read More

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http://dx.doi.org/10.1002/mbo3.830DOI Listing

Metal-Organic Frameworks and Their Derived Materials: Emerging Catalysts for a Sulfate Radicals-Based Advanced Oxidation Process in Water Purification.

Small 2019 Mar 18:e1900744. Epub 2019 Mar 18.

School of Chemical Engineering and Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland, Brisbane, Queensland, 4072, Australia.

With the ever-growing environmental issues, sulfate radical (SO )-based advanced oxidation processes (SR-AOPs) have been attracting widespread attention due to their high selectivity and oxidative potential in water purification. Among various methods generating SO , employing heterogeneous catalysts for activation of peroxymonosulfate or persulfate has been demonstrated as an effective strategy. Therefore, the future advances of SR-AOPs depend on the development of adequate catalysts with high activity and stability. Read More

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http://dx.doi.org/10.1002/smll.201900744DOI Listing

Chinese evergreen plant (Aglaonema) poisoning in a child presenting to an urban hospital in Papua New Guinea.

Authors:
Robin Oge

Emerg Med Australas 2019 Mar 18. Epub 2019 Mar 18.

Emergency Department, Port Moresby General Hospital, Port Moresby, Papua New Guinea.

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http://dx.doi.org/10.1111/1742-6723.13279DOI Listing

A Microfluidic Platform for the Simultaneous Quantification of Methanogen Populations in Anaerobic Digestion Processes.

Environ Microbiol 2019 Mar 18. Epub 2019 Mar 18.

BioTechnology Institute, University of Minnesota, St. Paul, Minnesota, USA.

Methanogens are a diverse group of archaea that play a critical role in the global carbon cycle. The lack of appropriate molecular tools to simultaneously quantify numerous methanogenic taxa, however, has largely limited our ability to study these communities in a wide variety of habitats, such as anaerobic digesters (ADs). In this study, 34 probe-based qPCR assays were designed to target all known methanogenic genera within the archaeal phylum Euryarchaeota. Read More

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http://dx.doi.org/10.1111/1462-2920.14589DOI Listing

Inheritance and fitness costs of sulfoxaflor resistance in Nilaparvata lugens (Stål).

Pest Manag Sci 2019 Mar 18. Epub 2019 Mar 18.

Hubei Insect Resources Utilization and Sustainable Pest Management Key Laboratory, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, P.R. China.

Background: Sulfoxaflor has been considered as a new tool for Nilaparvata lugens control in the field. In this study, a laboratory-selected resistant strain and a susceptible strain were used to evaluate the inheritance and fitness costs of sulfoxaflor resistance in N. lugens. Read More

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http://dx.doi.org/10.1002/ps.5412DOI Listing

Plant terpenes that mediate belowground interactions: prospects for bioengineering terpenoids for plant protection.

Pest Manag Sci 2019 Mar 18. Epub 2019 Mar 18.

Department of Metabolic Biology, John Innes Centre, Norwich research park, Colney Lane, Norwich NR4 7UH, UK.

Plants are sessile organisms that have evolved various mechanisms to adapt to complex and changing environments. One important feature of plant adaption is production of specialised metabolites. Terpenes are the largest class of specialised metabolites with over 80,000 structures reported so far, and they have important ecological functions in plant adaptation. Read More

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http://dx.doi.org/10.1002/ps.5410DOI Listing

Sensitivity of global soil carbon stocks to combined nutrient enrichment.

Ecol Lett 2019 Mar 18. Epub 2019 Mar 18.

Institute of Integrative Biology, ETH Zurich, Univeritätstrasse 16, 8092, Zurich, Switzerland.

Soil stores approximately twice as much carbon as the atmosphere and fluctuations in the size of the soil carbon pool directly influence climate conditions. We used the Nutrient Network global change experiment to examine how anthropogenic nutrient enrichment might influence grassland soil carbon storage at a global scale. In isolation, enrichment of nitrogen and phosphorous had minimal impacts on soil carbon storage. Read More

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http://dx.doi.org/10.1111/ele.13258DOI Listing

Do native and invasive herbivores have an effect on Brassica rapa pollination?

Plant Biol (Stuttg) 2019 Mar 18. Epub 2019 Mar 18.

Department of Biology, University of Naples Federico II, Complesso Universitario MSA, via Cinthia I-80126, Naples, Italy.

Mutualistic (e.g. pollination) and antagonistic (e. Read More

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http://dx.doi.org/10.1111/plb.12985DOI Listing

Enantioselective Total Synthesis of (+)-Flavisiamine F via Late-Stage Visible-Light-Induced Photochemical Cyclization.

Angew Chem Int Ed Engl 2019 Mar 18. Epub 2019 Mar 18.

Key Laboratory of Medicinal Chemistry for Natural Resource (Ministry of Education and Yunnan Province), State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, School of Chemical Science and Technology, Yunnan University, Kunming, 650091, China.

The structural features Kopsia alkaloids, in particular multiple all-carbon quaternary stereocenters in a caged and strained polycyclic skeleton, poses particular challenges for enantioselective total synthesis. Herein, we reported the first total synthesis of (+)-flavisiamine F. The synthetic approach involved a room-temperature Overman rearrangement for introducing the chiral amine at C21, a TMS-promoted ketal Claisen rearrangement for constructing the all-carbon quaternary stereocenter at C20, and a late-stage visible-light-induced photochemical cyclization for establishing the all-carbon quaternary stereocenter at C7. Read More

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http://dx.doi.org/10.1002/anie.201901241DOI Listing

Plant phenology and global climate change: current progresses and challenges.

Glob Chang Biol 2019 Mar 18. Epub 2019 Mar 18.

Department of Land Surveying and Geo-Informatics, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong.

Plant phenology, the annually recurring sequence of plant developmental stages, is important for plant functioning and ecosystem services and their biophysical and biogeochemical feedbacks to the climate system. Plant phenology depends on temperature, and the current rapid climate change has revived interest in understanding and modelling the responses of plant phenology to the warming trend and the consequences thereof for ecosystems. Here, we review recent progresses in plant phenology and its interactions with climate change. Read More

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https://onlinelibrary.wiley.com/doi/abs/10.1111/gcb.14619
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http://dx.doi.org/10.1111/gcb.14619DOI Listing
March 2019
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Identification of circadian rhythms in Nannochloropsis species using bioluminescence reporter lines.

Plant J 2019 Mar 18. Epub 2019 Mar 18.

Cell and Molecular Biology Program, Michigan State University.

Circadian clocks allow organisms to predict environmental changes caused by the rotation of the Earth. Although circadian rhythms are widespread among different taxa, the core components of circadian oscillators are not conserved and differ between bacteria, plants, animals and fungi. Stramenopiles are a large group of organisms in which circadian rhythms have been only poorly characterized and no clock components have been identified. Read More

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http://dx.doi.org/10.1111/tpj.14314DOI Listing

Heterosis is common and inbreeding depression absent in natural populations of Arabidopsis thaliana.

J Evol Biol 2019 Mar 18. Epub 2019 Mar 18.

Department of Plant Biology and W. K. Kellogg Biological Station, Michigan State University, East Lansing, MI, 48825, USA.

The importance of genetic drift in shaping patterns of adaptive genetic variation in nature is poorly known. Genetic drift should drive partially recessive deleterious mutations to high frequency, and inter-population crosses may therefore exhibit heterosis (increased fitness relative to intra-population crosses). Low genetic diversity and greater genetic distance between populations should increase the magnitude of heterosis. Read More

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http://dx.doi.org/10.1111/jeb.13441DOI Listing

Pharmaceuticals and Personal Care Products can be Transformed by Anaerobic Microbiomes in the Environment and in Waste Treatment Processes.

Environ Toxicol Chem 2019 Mar 18. Epub 2019 Mar 18.

Department of Environmental Sciences, Rutgers University, New Brunswick, NJ, USA.

Pharmaceutical and personal care products (PPCP) are emerging environmental contaminants that can be transformed by anaerobic microorganisms in anoxic environments. This study examined two consortia, enriched under methanogenic and sulfate-rich conditions, that demethylate the phenylmethyl ether anti-inflammatory drug naproxen to 6-O-desmethylnaproxen. Both enriched consortia were also able to demethylate a range of phenylmethyl ether compounds of plant-based origin or used as pharmaceutical or personal care products. Read More

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http://dx.doi.org/10.1002/etc.4406DOI Listing

MADS-box genes underground becoming mainstream: plant root developmental mechanisms.

New Phytol 2019 Mar 18. Epub 2019 Mar 18.

Departamento de Ecología Funcional, Instituto de Ecología, Universidad Nacional Autónoma de México, 3er Circuito Exterior, Ciudad Universitaria, Coyoacán, México, D.F., 04510.

Plant growth is largely post-embryonic and depends on meristems that are active throughout the life span of an individual. Developmental patterns rely on the coordinated spatio-temporal expression of different genes, and the activity of transcription factors (TFs) is particularly important during most morphogenetic processes. MADS-box genes constitute a TF family in eukaryotes. Read More

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http://dx.doi.org/10.1111/nph.15793DOI Listing

Microplastic effects on plants.

New Phytol 2019 Mar 18. Epub 2019 Mar 18.

Freie Universität Berlin, Institut für Biologie, 14195, Berlin, Germany.

Microplastic effects in terrestrial ecosystems have recently moved into focus, after for about a decade research was limited to aquatic systems. While effects on soil physical properties and soil biota are starting to become apparent, there is not much information on consequence for plant performance. We here propose and discuss mechanistic pathways through which microplastics could impact plant growth, either positively or negatively. Read More

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http://dx.doi.org/10.1111/nph.15794DOI Listing

Sun-induced chlorophyll fluorescence and its importance for modeling photosynthesis from the side of light reactions.

New Phytol 2019 Mar 18. Epub 2019 Mar 18.

School of Integrative Plant Science, Cornell University, Ithaca, New York, 14853, USA.

Recent progress in observing sun-induced chlorophyll fluorescence (SIF) provides an unprecedented opportunity to advance photosynthesis research in natural environments. However, we still lack an analytical framework to guide SIF studies and integration with the well-developed active fluorescence approaches. Here we derive a set of coupled fundamental equations to describe the dynamics of SIF and its relationship with C and C photosynthesis. Read More

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http://dx.doi.org/10.1111/nph.15796DOI Listing

Convergent evolution of root system architecture in two independently evolved lineages of weedy rice.

New Phytol 2019 Mar 18. Epub 2019 Mar 18.

Washington University in St. Louis, 1 Brookings Dr, St. Louis, MO, 63130.

Root system architecture (RSA) is a critical aspect of plant growth and competitive ability. Here we used two independently-evolved strains of weedy rice, a de-domesticated form of rice, to study the evolution of weed-associated RSA traits and the extent to which they evolve through shared or different genetic mechanisms. We characterized 98 two- and three-dimensional RSA traits in 671 plants representing parents and descendants of two recombinant inbred line populations derived from two weed × crop crosses. Read More

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http://dx.doi.org/10.1111/nph.15791DOI Listing

Salivary DNase II from Laodelphax striatellus acts as an effector that suppresses plant defense.

New Phytol 2019 Mar 18. Epub 2019 Mar 18.

Department of Entomology, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, China.

● Extracellular DNA, released by damaged plant cells, acts as a damage-associated molecular pattern (DAMP). We demonstrated previously that the small brown planthopper (Laodelphax striatellus, SBPH) secreted DNase II when feeding on artificial diets. However, the function of DNase II in insect feeding remained elusive. Read More

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http://dx.doi.org/10.1111/nph.15792DOI Listing
March 2019
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Molecular analysis of somatic embryogenesis through proteomic approach and optimization of protocol in recalcitrant Musa spp.

Physiol Plant 2019 Mar 18. Epub 2019 Mar 18.

Crop Improvement Division, ICAR-National Research Centre for Banana, Thogamalai Main Road, Thayanoor Post, Tiruchirappalli, 102, Tamil Nadu, India.

Somatic embryogenesis (SE) is a complex stress related process regulated by numerous biological factors. SE is mainly applicable to mass propagation and genetic improvement of plants through gene transfer technology and induced mutations. In banana, SE is highly genome dependent as the efficiency varies with cultivars. Read More

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http://dx.doi.org/10.1111/ppl.12966DOI Listing

Molecular dialogue between arbuscular mycorrhizal fungi and the non-host plant Arabidopsis thaliana switches from initial detection to antagonism.

New Phytol 2019 Mar 18. Epub 2019 Mar 18.

Plant-Microbe Interactions, Department of Biology, Science4Life, Utrecht University, 3508, TB, Utrechtthe, Netherlands.

Approximately 29% of all vascular plant species are unable to establish an arbuscular mycorrhizal (AM) symbiosis. Despite this, AM fungi (Rhizophagus spp.) are enriched in the root microbiome of the non-host Arabidopsis thaliana and Arabidopsis roots become colonized when AM networks nurtured by host plants are available. Read More

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http://dx.doi.org/10.1111/nph.15798DOI Listing

Island woodiness underpins accelerated disparification in plant radiations.

New Phytol 2019 Mar 18. Epub 2019 Mar 18.

Department of Systematic & Evolutionary Botany, University of Zurich, Zollikerstrasse 107, 8008, Zurich, Switzerland.

The evolution of secondary (insular) woodiness and the rapid disparification of plant growth forms associated with island radiations show intriguing parallels between oceanic islands and tropical alpine sky islands. However, the evolutionary significance of these phenomena remains poorly understood and the focus of debate. We explore the evolutionary dynamics of species diversification and trait disparification across evolutionary radiations in contrasting island systems compared to their non-island relatives. Read More

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http://dx.doi.org/10.1111/nph.15797DOI Listing

Evolutionary epidemiology predicts the emergence of glyphosate resistance in a major agricultural weed.

New Phytol 2019 Mar 18. Epub 2019 Mar 18.

Department of Biointeractions and Crop Protection, Rothamsted Research, Harpenden, Hertfordshire, AL5 2JQ, UK.

The evolution of resistance to herbicides is a striking example of rapid, human-directed adaptation with major consequences for food production. Most studies of herbicide resistance are performed reactively and focus on post-hoc determination of resistance mechanisms following the evolution of field resistance. If the evolution of resistance can be anticipated however, pro-active management to slow or prevent resistance traits evolving can be advocated. Read More

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http://dx.doi.org/10.1111/nph.15800DOI Listing

Induction, engineering, and hijacking of defensive strategies of the host by a gall-inducing weevil.

Ecology 2019 Mar 18:e02693. Epub 2019 Mar 18.

Dept de Ciências Biológicas, Faculdade de Filosofia, Ciências e Letras do Alto São Francisco, Av. Laerton Paulinelli 153, 35595-000, Luz MG, Brazil.

Plants cannot simply flee from an unbidden guest. To survive the attacks from their many natural enemies, plants have instead evolved some strategies of defense, some of which are highly complex. One such strategy works by attracting the attention of mutualistic organisms to help combat enemies such as animals that would consume leaves, stems, reproductive structures (e. Read More

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http://dx.doi.org/10.1002/ecy.2693DOI Listing

Effects of increasing aridity and chronic anthropogenic disturbance on seed dispersal by ants in Brazilian Caatinga.

J Anim Ecol 2019 Mar 18. Epub 2019 Mar 18.

Departamento de Botânica, Universidade Federal de Pernambuco, Av. Prof. Moraes Rêgo s/n, Cidade Universitária, 50690-901, Recife, PE, Brazil.

1.Anthropogenic disturbance and climate change are the main drivers of biodiversity loss and ecological services around the globe. There is concern that climate change will exacerbate the impacts of disturbance and thereby promote biotic homogenization, but its consequences for ecological services are unknown. Read More

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http://dx.doi.org/10.1111/1365-2656.12979DOI Listing

The influence of spatial sampling scales on ant-plant interaction network architecture.

J Anim Ecol 2019 Mar 18. Epub 2019 Mar 18.

Departamento de Botânica e Ecologia, Universidade Federal de Mato Grosso, Cuiabá, Mato Grosso CEP, 78060-900, Brazil.

1.Despite great interest in metrics to quantify the structure of ecological networks, the effects of sampling and scale remain poorly understood. In fact, one of the most challenging issues in ecology is how to define suitable scales (i. Read More

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http://dx.doi.org/10.1111/1365-2656.12978DOI Listing

Molecular mechanism underlying Piriformospora indica-mediated plant improvement/protection for sustainable agriculture.

Acta Biochim Biophys Sin (Shanghai) 2019 Mar;51(3):229-242

School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, China.

The beneficial endophytic microorganisms have received significant attention in agriculture because of their exceptional capabilities to facilitate functions like nutrient enrichment, water status, and stress tolerance (biotic and abiotic). This review signifies the molecular mechanisms to better understand the Piriformospora indica-mediated plants improvement or protection for sustainable agriculture. P. Read More

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http://dx.doi.org/10.1093/abbs/gmz004DOI Listing
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