4,359 results match your criteria short photoperiod

Haplotype variations of major flowering time genes in quinoa unveil their role in the adaptation to different environmental conditions.

Plant Cell Environ 2021 Apr 20. Epub 2021 Apr 20.

Plant Breeding Institute, Christian-Albrechts-University of Kiel, Kiel, Germany.

Response to photoperiod is of major importance in crop production. It defines the adaptation of plants to local environments. Quinoa is a short day plant which had been domesticated in the Andeans regions. Read More

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First Report of Meloidogyne graminicola on Rice in Henan Province, China.

Plant Dis 2021 Apr 20. Epub 2021 Apr 20.

Institute of Plant Protection, Chinese Academy of Agricultural Sciences, West Yuanmingyuan Road No.2,, Beijing, China, 100193;

Rice (Oryza sativa) is an important food crop in China and root-knot nematode Meloidogyne graminicola has been one of the most important diseases on rice in recently five years (Ju et al. 2020). In August 2020, rice plants were found to be maldeveloped, yellow leaves and hooked root tips in an irrigated paddy field of Yuanyang County, Xinxiang City, Henan Province. Read More

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O -induced degradation of Rubisco protein and loss of Rubisco mRNA in relation to leaf age in Solanum tuberosum L.

New Phytol 1994 Aug;127(4):741-748

Graduate Program in Plant Physiology, and Department of Plant Pathology and The Environmental Resources Research Institute, The Pennsylvania State University, 211 Buckhout Laboratory, University Park, PA 16802, USA.

The effect of ozone (O ) on Rubisco degradation was investigated by dark incubation of potato plants (Solanum tuberosum L. cv. Norland) following exposure to charcoal-filtered air or 0. Read More

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Control of flowering and reproduction in temperate grasses.

O M Heide

New Phytol 1994 Oct;128(2):347-362

Department of Biology and Nature Conservation, Agricultural University of Norway, P.O. Box 5014, N-1432 ÅRs, Norway.

Temperate grasses of the subfamily Festucioideae can be grouped into two main categories according to their environmental control of flowering, species with regular long day (LD) induction, and those with dual induction requirements. The former group includes the temperate annual crosses and a few perennial species such as Phleum pratense and Poa nemoralis. These species base no winter requirement and require only LD to flower. Read More

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October 1994

Short photoperiods induce fructan accumulation and tuberous root development in Dahlia seedlings.

New Phytol 2001 Mar;149(3):449-454

Department of Horticulture, Clemson University, Clemson, South Carolina 19624, USA.

• The effect is reported here of photoperiod on fructan accumulation in the tuberous roots of Dahlia sp. cv. Sunny Rose seedlings. Read More

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Induction of diapause by clock proteins period and timeless via changes in PTTH and ecdysteroid titer in the sugar beet moth, Scrobipalpa ocellatella (Lepidoptera: Gelechiidae).

Arch Insect Biochem Physiol 2021 Apr 16:e21790. Epub 2021 Apr 16.

Department of Entomology, Faculty of Agriculture, Tarbiat Modares University, Tehran, Iran.

The sugar beet moth, Scrobipalpa ocellatella (Boyd), one of the most severe sugar beet pests, causes quantitative and qualitative yield losses late in the autumn. Previously, it was shown that low temperature and short-day photoperiod together cause diapause induction in pupae. Here, the interaction of the critical elements of the diapause induction, including the period (PER), timeless (TIM), prothoracicotropic hormone (PTTH), and ecdysteroid titer, were investigated. Read More

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First Report of Leaf Spot in Farfugium japonicum Caused by Alternaria alternata in China.

Plant Dis 2021 Apr 15. Epub 2021 Apr 15.


Farfugium japonicum (L.) Kitam (with the common name leopard plant) is known as a garden and medical herb, and belongs to the family Asteraceae. In May 2019, a leaf spot disease was observed on the upper leaf surface of F. Read More

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Juvenile hormone regulates photoperiod-mediated male reproductive diapause via the methoprene-tolerant gene in the ladybeetle Harmonia axyridis.

Insect Sci 2021 Apr 11. Epub 2021 Apr 11.

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

Juvenile hormone (JH) absence induces photoperiod-mediated reproductive diapause, which is characterized by reproductive cessation. Although the role of methoprene-tolerant (Met)-mediated JH signaling in photoperiod-mediated female reproduction has been well documented, its role in male reproduction remains unclear. In this study, we investigated the role of JH in regulating photoperiod-mediated development of the male internal reproductive system (IRS) in the predatory ladybeetle Harmonia axyridis (Pallas). Read More

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Is Induced by Short Days in Soybean and May Accelerate Flowering When Overexpressed in via Inhibiting .

Front Plant Sci 2021 26;12:629069. Epub 2021 Feb 26.

Key Laboratory of Soybean Biology of Ministry of Education, China (Key Laboratory of Biology and Genetics and Breeding for Soybean in Northeast China), Northeast Agricultural University, Harbin, China.

Photoperiod is one of the main climatic factors that determine flowering time and yield. Some members of the INDETERMINATE DOMAIN (IDD) transcription factor family have been reported to be involved in regulation of flowering time in Arabidopsis, maize, and rice. In this study, the domain analysis showed that GmIDD had a typical ID domain and was a member of the soybean IDD transcription factor family. Read More

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February 2021

Pinealectomy and gonadectomy modulate amplitude, but not photoperiodic modulation of Clock gene expression in the Syrian hamster suprachiasmatic nuclei.

Eur J Neurosci 2021 Apr 11. Epub 2021 Apr 11.

Institute of Cellular and Integrative Neurosciences, CNRS and University of Strasbourg, Strasbourg, France.

The duration of daytime light phase (photoperiod) controls reproduction in seasonal mammals. Syrian hamsters are sexually active when exposed to long photoperiod, while gonadal atrophy is observed after exposure to short photoperiod. The photorefractory period, or photorefractoriness, is a particular state of spontaneous recrudescence of sexual activity that occurs after a long-term exposure to short photoperiod. Read More

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Effects of dim artificial light at night on locomotor activity, cardiovascular physiology, and circadian clock genes in a diurnal songbird.

Environ Pollut 2021 Mar 31;282:117036. Epub 2021 Mar 31.

Department of Biology, University of Nevada, Reno, Reno, NV, USA.

Artificial light is transforming the nighttime environment and quickly becoming one of the most pervasive pollutants on earth. Across taxa, light entrains endogenous circadian clocks that function to synchronize behavioral and physiological rhythms with natural photoperiod. Artificial light at night (ALAN) disrupts these photoperiodic cues and has consequences for humans and wildlife including sleep disruption, physiological stress and increased risk of cardiovascular disease. Read More

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Critical Photoperiod and Its Potential to Predict Mosquito Distributions and Control Medically Important Pests.

J Med Entomol 2021 Apr 9. Epub 2021 Apr 9.

Department of Entomology, The Ohio State University, Coffey Road, Kottman Hall, Columbus, OH, USA.

Diapause, a period of arrested development that allows mosquitoes to survive inhospitable conditions, is triggered by short daylengths in temperate mosquitoes. Different populations of mosquitoes initiate diapause in response to a specific photoperiod, or daylength, resulting in population-specific differences in annual cycles of abundance. The photoperiod that causes approximately 50% of a population to initiate diapause is known as the critical photoperiod (CPP). Read More

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Phenology and Floret Development as Affected by the Interaction between and .

Plants (Basel) 2021 Mar 12;10(3). Epub 2021 Mar 12.

Department of Crop and Forest Sciences-AGROTECNIO CERCA Center, University of Lleida, Av. R. Roure 191, 25198 Lleida, Spain.

Earliness per se () genes may play a critical role in further improving wheat adaptation and fine-tuning wheat development to cope with climate change. There are only few studies on the detailed effect of on wheat development and fewer on the interaction of with the environment and other genes determining time to anthesis. Furthermore, it seems relevant to study every newly discovered gene and its probable interactions as the mechanisms and detailed effects of each may be quite different. Read More

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Integrative Analysis of Gene Expression and miRNAs Reveal Biological Pathways Associated with Bud Paradormancy and Endodormancy in Grapevine.

Plants (Basel) 2021 Mar 31;10(4). Epub 2021 Mar 31.

Edgar McFadden BioStress Laboratory, Agronomy, Horticulture, and Plant Science Department, BioSNTR, South Dakota State University, Brookings, SD 57007, USA.

Transition of grapevine buds from paradormancy to endodormancy is coordinated by changes in gene expression, phytohormones, transcription factors, and other molecular regulators, but the mechanisms involved in transcriptional and post-transcriptional regulation of dormancy stages are not well delineated. To identify potential regulatory targets, an integrative analysis of differential gene expression profiles and their inverse relationships with miRNA abundance was performed in paradormant (long day (LD) 15 h) or endodormant (short day (SD), 13 h) buds. There were 400 up- and 936 downregulated differentially expressed genes in SD relative to LD budsGene set and gene ontology enrichment analysis indicated that hormone signaling and cell cycling genes were downregulated in SD relative to LD buds. Read More

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Voltine Ecotypes of the Asian Corn Borer and Their Response to Climate Warming.

Insects 2021 Mar 9;12(3). Epub 2021 Mar 9.

Department of Entomology, University of Minnesota, St. Paul, MN 55108, USA.

In the Asian corn borer (ACB), (Guenée), diapause is governed by a multigenetic constitution that responds to daylength and temperature with seasonality. The ACB displays uni- or multivoltinism, depending on its geographic specificity. Hence, warmer temperatures may result in alternation of voltinism in the ACB, which will help in understanding the ecological consequences of climate warming on insects. Read More

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Antagonism between PTP1B and PTK Mediates Adults' Insulin-Like Signaling Regulation of Egg Diapause in the Migratory Locust.

Insects 2021 Mar 17;12(3). Epub 2021 Mar 17.

State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China.

Diapause is a physiological development arrest state that helps insects to adapt to seasonality and overcome adverse environmental conditions. Numerous reports have indicated that insulinlike and fork head transcription factor (FOXO) are involved in the regulation of diapause in insects. However, the upstream modulators of the insulin-like signaling pathway (ISP) involved in diapause regulation are still unknown. Read More

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Increased size and energy reserves in diapausing eggs of temperate Aedes aegypti populations.

J Insect Physiol 2021 Mar 31;131:104232. Epub 2021 Mar 31.

Departamento de Ecología, Genética y Evolución, and Instituto IEGEBA (UBA-CONICET), Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires. Ciudad Universitaria, Pabellón 2. C1428EHA, Buenos Aires, Argentina. Electronic address:

Many insects overwinter in diapause, a pre-programmed anticipated response to unfavorable environmental conditions, often induced by a short-day photoperiod. Diapause involves morphological changes and increased energy stores required for metabolic demands during winter. In diapausing mosquito eggs, the accumulation of lipids plays an important role, because these molecules are the primary fuel consumed during embryogenesis and pharate larvae metabolism, and have a key role in egg desiccation resistance. Read More

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Assessing adaptive requirements and breeding potential of spelt under Mediterranean environment.

Sci Rep 2021 Mar 30;11(1):7208. Epub 2021 Mar 30.

Department of Vegetable and Field Crops, Institute of Plant Sciences, Agricultural Research Organization (ARO)-Volcani Center, 7528809, Rishon LeZion, Israel.

The rising demand for spelt wheat (Triticum aestivum ssp. spelta) as a high-value grain crop has raised interest in its introduction into non-traditional spelt growing areas. This study aimed to assess adaptive constrains of spelt under short Mediterranean season. Read More

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Plasticity of nutrient accumulation patterns in diapausing fall webworm pupae.

Bull Entomol Res 2021 Mar 31:1-8. Epub 2021 Mar 31.

Department of Biology, The University of Western Ontario, London, ONN6A 5B7, Canada.

The accumulation of nutrients during diapause preparation is crucial because any lack of nutrition will reduce the likelihood of insects completing diapause, thereby decreasing their chances of survival and reproduction. The fall webworm, Hyphantria cunea, diapause as overwintering pupae and their diapause incidence and diapause intensity are regulated by the photoperiod. In this study, we test the hypothesis that photoperiod influences energy reserve accumulation during diapause preparation in fall webworm. Read More

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Drivers of linkage disequilibrium across a species' geographic range.

PLoS Genet 2021 Mar 26;17(3):e1009477. Epub 2021 Mar 26.

Department of Environmental Sciences, University of Basel, Basel, Switzerland.

While linkage disequilibrium (LD) is an important parameter in genetics and evolutionary biology, the drivers of LD remain elusive. Using whole-genome sequences from across a species' range, we assessed the impact of demographic history and mating system on LD. Both range expansion and a shift from outcrossing to selfing in North American Arabidopsis lyrata were associated with increased average genome-wide LD. Read More

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Body Temperature and Activity Rhythms Under Different Photoperiods in High Arctic Svalbard ptarmigan ().

Front Physiol 2021 8;12:633866. Epub 2021 Mar 8.

Arctic Chronobiology and Physiology, Arctic and Marine Biology, UiT The Arctic University of Norway, Tromsø, Norway.

Organisms use circadian rhythms to anticipate and exploit daily environmental oscillations. While circadian rhythms are of clear importance for inhabitants of tropic and temperate latitudes, its role for permanent residents of the polar regions is less well understood. The high Arctic Svalbard ptarmigan shows behavioral rhythmicity in presence of light-dark cycles but is arrhythmic during the polar day and polar night. Read More

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Nanda-Hamner Curves Show Huge Latitudinal Variation but No Circadian Components in Photoperiodism.

J Biol Rhythms 2021 Mar 22:748730421997265. Epub 2021 Mar 22.

Department of Biological and Environmental Science, University of Jyväskylä, Jyväskylä, Finland.

Insect species with a wide distribution offer a great opportunity to trace latitudinal variation in the photoperiodic regulation of traits important in reproduction and stress tolerances. We measured this variation in the photoperiodic time-measuring system underlying reproductive diapause in , using a Nanda-Hamner (NH) protocol. None of the study strains showed diel rhythmicity in female diapause proportions under a constant day length (12 h) and varying night lengths in photoperiods ranging from 16 to 84 h at 16°C. Read More

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The darkness and the light: diurnal rodent models for seasonal affective disorder.

Dis Model Mech 2021 Jan 26;14(1). Epub 2021 Jan 26.

Institute of Arctic Biology, University of Alaska Fairbanks, Fairbanks, AK 99775, USA

The development of animal models is a critical step for exploring the underlying pathophysiological mechanisms of major affective disorders and for evaluating potential therapeutic approaches. Although most neuropsychiatric research is performed on nocturnal rodents, differences in how diurnal and nocturnal animals respond to changing photoperiods, combined with a possible link between circadian rhythm disruption and affective disorders, has led to a call for the development of diurnal animal models. The need for diurnal models is most clear for seasonal affective disorder (SAD), a widespread recurrent depressive disorder that is linked to exposure to short photoperiods. Read More

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January 2021

Polymorphism of winter phenotype in Siberian hamster: consecutive litters do not differ in photoresponsiveness but prolonged acclimation to long photoperiod inhibits winter molt.

Front Zool 2021 Mar 18;18(1):11. Epub 2021 Mar 18.

Department of Animal Physiology and Neurobiology, Nicolaus Copernicus University, Toruń, Poland.

Background: The theory of delayed life history effects assumes that phenotype of adult individual results from environmental conditions experienced at birth and as juvenile. In seasonal environments, being born late in the reproductive season affects timing of puberty, body condition, longevity, and fitness. We hypothesized that late-born individuals are more prone to respond to short photoperiod (SP) than early born ones. Read More

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Identification of biogenic amines involved in photoperiod-dependent caste-fate determination during the adult stage in a temperate paper wasp.

J Insect Physiol 2021 Mar 10;131:104223. Epub 2021 Mar 10.

Graduate School of Agriculture, Tamagawa University, Machida, Tokyo, Japan. Electronic address:

In the temperate paper wasp Polistes jokahamae, caste is influenced by photoperiod during the adult stage, but the mechanisms underlying the caste-fate determination system have been unclear. We measured the brain levels of monoamines and related substances in females kept isolated for two weeks under different photoperiods. Except for in the first-emerging group, the females developed ovaries under long-day conditions, whereas they stored lipids under short-day conditions. Read More

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Photoperiod-dependent developmental reprogramming of the transcriptional response to seawater entry in Atlantic salmon (Salmo salar).

G3 (Bethesda) 2021 Apr;11(4)

Department of Arctic and Marine Biology, UiT -The Arctic University of Norway, Tromsø NO-9037, Norway.

The developmental transition of juvenile salmon from a freshwater resident morph (parr) to a seawater (SW) migratory morph (smolt), known as smoltification, entails a reorganization of gill function to cope with the altered water environment. Recently, we used RNAseq to characterize the breadth of transcriptional change which takes place in the gill in the FW phase of smoltification. This highlighted the importance of extended exposure to short, winter-like photoperiods (SP) followed by a subsequent increase in photoperiod for completion of transcriptional reprogramming in FW and efficient growth following transfer to SW. Read More

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Effect of Parental Photoperiod on Body Size and Developmental Time of Aedes aegypti (Diptera: Culicidae) in Buenos Aires City.

J Med Entomol 2021 Mar 11. Epub 2021 Mar 11.

Departamento de Ecología, Genética y Evolución, and IEGEBA (UBA-CONICET), Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Buenos Aires, Argentina.

Many insects use photoperiod as a signal to anticipate upcoming unfavorable conditions. Photoperiod sensitivity may be a relevant factor in Aedes (Stegomyia) aegypti (L.) populations at the cool margins of the species' range, where winter conditions have a strong effect on population dynamics. Read More

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Altered Light Sensitivity of Circadian Clock in Shank3 Mouse.

Front Neurosci 2021 18;15:604165. Epub 2021 Feb 18.

División de Neurociencias, Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, Mexico.

Autism spectrum disorder (ASD) is a neurodevelopmental disorder characterized by impairment in communication and social interaction, repetitive or stereotypical behaviors, altered sensory perception, and sleep disorders. In general, the causes of ASD remain unknown, but in Phelan-McDermid syndrome, it is known that the disorder is related to the haploinsufficiency of the Shank3 gene. We used an autism model with compromised glutamatergic signaling, the Shank3 mouse, to study the circadian rhythm architecture of locomotion behavior and its entrainment to light. Read More

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February 2021

Continuous Light Does Not Compromise Growth and Yield in Mini-Cucumber Greenhouse Production with Supplemental LED Light.

Plants (Basel) 2021 Feb 17;10(2). Epub 2021 Feb 17.

Harrow Research and Development Centre, Agriculture & Agri-Food Canada, Harrow, ON N0R 1G0, Canada.

Continuous lighting (CL, 24 h) can reduce the light intensity/light capital costs used to achieve the desired amount of light for year-round greenhouse vegetable production in comparison to short photoperiods of lighting. However, growth under CL has led to leaf injury characterized by chlorosis unless a thermoperiod or alternating light spectrum during CL is used. To date, there is no literature relating to how cucumbers () respond to CL with LEDs in a full production cycle. Read More

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February 2021

Modelling strawberry quality in a longitudinal study under the marketing concept of branding.

Heliyon 2021 Feb 15;7(2):e06165. Epub 2021 Feb 15.

Department of Agricultural, Forest and Food Sciences (DISAFA), University of Turin, Largo Paolo Braccini, 2, Grugliasco (TO), 10095, Piedmont, Italy.

Background: Marketing strategies, such as branding, redefine how consumers perceive quality and create new requirements related to season length and quality homogeneity, among others. For short-day (SD) strawberry cultivar brands, the commercial season is short due to a dependency on temperature and photoperiod. A plausible strategy to extend the commercialization period is to use different varieties within a single brand; however, this has led to inconsistent quality in other fruit crops. Read More

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February 2021