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Dim light at night unmasks sex-specific differences in circadian and autonomic regulation of cardiovascular physiology.
Commun Biol
September 2024
Department of Physiology, University of Kentucky, Lexington, USA.
Article Synopsis
- - Shift work and exposure to dim light at night (dLAN) mess with our natural day-night biological rhythms, affecting how our bodies regulate things like feeding and heart rate.
- - Mice subjected to dLAN had weaker day-night rhythms in feeding and cardiovascular functions, with female mice showing lower sympathetic regulation at night and male mice showing higher regulation during the day.
- - Implementing time-restricted feeding during dLAN helped restore normal autonomic regulation of heart rate and blood pressure in both male and female mice, suggesting a potential strategy to counteract the negative effects of nighttime light exposure.
Melatonin-Nitric Oxide Crosstalk in Plants and the Prospects of NOMela as a Nitric Oxide Donor.
Int J Mol Sci
August 2024
Department of Applied Biosciences, College of Agriculture and Life Sciences, Kyungpook National University, Daegu 41566, Republic of Korea.
Melatonin regulates vital physiological processes in animals, such as the circadian cycle, sleep, locomotion, body temperature, food intake, and sexual and immune responses. In plants, melatonin modulates seed germination, longevity, circadian cycle, photoperiodicity, flowering, leaf senescence, postharvest fruit storage, and resistance against biotic and abiotic stresses. In plants, the effect of melatonin is mediated by various regulatory elements of the redox network, including RNS and ROS.
View Article and Find Full Text PDFGeographic conditions impact the relationship between plant phenology and phylogeny.
Sci Total Environ
October 2024
Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China; University of Chinese Academy of Sciences, Beijing 100049, China. Electronic address:
Plant phenology is influenced by a combined effect of phylogeny and climate, although it is yet unclear how these two variables work together to change phenology. We synthesized 107 previously published studies to examine whether phenological changes were impacted by both phylogeny and climate changes in various geographical settings globally. Phenological observation data from 52,463 plant species at 71 sites worldwide revealed that 90 % of phenological records showed phylogenetic conservation.
View Article and Find Full Text PDFCONSTANS, a HUB for all seasons: How photoperiod pervades plant physiology regulatory circuits.
Plant Cell
May 2024
Plant Development Group - Institute for Plant Biochemistry and Photosynthesis, Consejo Superior de Investigaciones Científicas, Universidad de Sevilla, 41092 Seville, Spain.
How does a plant detect the changing seasons and make important developmental decisions accordingly? How do they incorporate daylength information into their routine physiological processes? Photoperiodism, or the capacity to measure the daylength, is a crucial aspect of plant development that helps plants determine the best time of the year to make vital decisions, such as flowering. The protein CONSTANS (CO) constitutes the central regulator of this sensing mechanism, not only activating florigen production in the leaves but also participating in many physiological aspects in which seasonality is important. Recent discoveries place CO in the center of a gene network that can determine the length of the day and confer seasonal input to aspects of plant development and physiology as important as senescence, seed size, or circadian rhythms.
View Article and Find Full Text PDFComplex epistatic interactions between ELF3, PRR9, and PRR7 regulate the circadian clock and plant physiology.
Genetics
March 2024
Department of Biology, University of York, Wentworth Way, York, YO10 5DD, UK.
Circadian clocks are endogenous timekeeping mechanisms that coordinate internal physiological responses with the external environment. EARLY FLOWERING3 (ELF3), PSEUDO RESPONSE REGULATOR (PRR9), and PRR7 are essential components of the plant circadian clock and facilitate entrainment of the clock to internal and external stimuli. Previous studies have highlighted a critical role for ELF3 in repressing the expression of PRR9 and PRR7.
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