Molecular mechanisms and physiological importance of circadian rhythms

Nature Reviews Molecular Cell Biology, Год журнала: 2019, Номер 21(2), С. 67 - 84

Опубликована: Ноя. 25, 2019

Язык: Английский

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Evidence for the adaptive significance of circadian rhythms

Ecology Letters, Год журнала: 2009, Номер 12(9), С. 970 - 981

Опубликована: Июнь 29, 2009

Circadian (approximately 24 h) clock regulated biological rhythms have been identified in a wide range of organisms from prokaryotic unicellular cyanobacteria to higher mammals. These regulate an enormous variety processes including gene expression, metabolic processes, activity and reproduction. Given the widespread occurrence circadian systems it is not surprising that extensive efforts directed at understanding adaptive significance rhythms. In this review we discuss approaches findings resulted. studies on their natural environments, some species show adaptations correlate with living different latitudes, such as clines properties. Additionally, plasticity suggested match demands physical social environment. A number experiments, both field laboratory, examined effects having system does resonate organism's We conclude results these suggest matches oscillating environment adaptive.

Язык: Английский

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Insect Diapause

Опубликована: Янв. 13, 2022

Our highly seasonal world restricts insect activity to brief portions of the year. This feature necessitates a sophisticated interpretation changes and enactment mechanisms for bringing development halt then reinitiating it when inimical season is past. The dormant state diapause serves bridge unfavourable seasons, its timing provides powerful mechanism synchronizing development. book explores how signals are monitored used by insects enact specific molecular pathways that generate phenotype. broad perspective offered here scales from ecological thus comprehensive view this exciting vibrant research field, offering insights on topics ranging pest management, evolution, speciation, climate change disease transmission, human health, as well analogies with other forms invertebrate dormancy mammalian hibernation.

Язык: Английский

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Evaluating the Adaptive Fitness of Circadian Clocks and their Evolution

Journal of Biological Rhythms, Год журнала: 2024, Номер 39(2), С. 115 - 134

Опубликована: Янв. 7, 2024

Surely most chronobiologists believe circadian clocks are an adaptation of organisms that enhances fitness, but we certain this focus our research effort really confers a fitness advantage? What is the evidence, and how do evaluate it? best criteria? These questions topic review. In addition, will discuss selective pressures might have led to historical evolution systems while considering intriguing question whether ongoing climate change modulating these so clock still evolving.

Язык: Английский

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Evolution of time-keeping mechanisms: early emergence and adaptation to photoperiod

Philosophical Transactions of the Royal Society B Biological Sciences, Год журнала: 2011, Номер 366(1574), С. 2141 - 2154

Опубликована: Июнь 20, 2011

Virtually all species have developed cellular oscillations and mechanisms that synchronize these to environmental cycles. Such cycles in biotic (e.g. food availability predation risk) or abiotic temperature light) factors may occur on a daily, annual tidal time scale. Internal timing facilitate behavioural physiological adaptation such changes conditions. These commonly involve an internal molecular oscillator (a ‘clock’) is synchronized (‘entrained’) the cycle by receptor responding relevant signals (‘ Zeitgeber ’, i.e. German for time-giver). To understand evolution of mechanisms, we leading selective advantage. Although major advances been made our understanding driving ( proximate questions), studies identifying natural selection clock systems ultimate questions) are rather limited. Here, discuss advantage circadian system how its day length variation functional role optimizing seasonal timing. We various cases where advantages shown temporarily loss cause suggest explanation why has emerged primitive life forms like cyanobacteria evaluate possible mechanism enabled bacteria adapt length. further photoperiodic measurement explain differential pressures period when exposed changing climatic conditions global warming) they expand their geographical range different latitudes altitudes.

Язык: Английский

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Light and temperature sensing and signaling in induction of bud dormancy in woody plants

Plant Molecular Biology, Год журнала: 2010, Номер 73(1-2), С. 37 - 47

Опубликована: Март 7, 2010

Язык: Английский

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Genome-Wide Patterns of Adaptation to Temperate Environments Associated with Transposable Elements in Drosophila

PLoS Genetics, Год журнала: 2010, Номер 6(4), С. e1000905 - e1000905

Опубликована: Апрель 8, 2010

Investigating spatial patterns of loci under selection can give insight into how populations evolved in response to selective pressures and provide monitoring tools for detecting the impact environmental changes on populations. Drosophila is a particularly good model study adaptation heterogeneity since it tropical species that originated sub-Saharan Africa has only recently colonized rest world. There strong evidence adaptive role Transposable Elements (TEs) evolution Drosophila, TEs might play an important specifically temperate climates. In this work, we analyzed frequency set putatively neutral with contrasting climates were collected near endpoints two known latitudinal clines Australia North America. The results obtained consistency between continents strongly suggest are involved We integrated information population behavior, possible agents, both molecular functional their nearby genes infer plausible phenotypic consequences these insertions. conclude environments widespread significant adaptation. It remarkable such diverse located next consistently climate-related factors. argue reverse genomic analyses, as one described necessary arrive at comprehensive picture

Язык: Английский

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Revisiting classic clines in Drosophila melanogaster in the age of genomics

Trends in Genetics, Год журнала: 2015, Номер 31(8), С. 434 - 444

Опубликована: Июнь 13, 2015

Язык: Английский

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Clocks for the city: circadian differences between forest and city songbirds

Proceedings of the Royal Society B Biological Sciences, Год журнала: 2013, Номер 280(1763), С. 20130593 - 20130593

Опубликована: Июнь 5, 2013

To keep pace with progressing urbanization organisms must cope extensive habitat change. Anthropogenic light and noise have modified differences between day night, may thereby interfere circadian clocks. Urbanized species, such as birds, are known to advance their activity early morning night hours. We hypothesized that patterns reflected by properties of the endogenous clock. Using automatic radio-telemetry, we tested this idea comparing free-living forest city European blackbirds ( Turdus merula ). then recaptured same individuals recorded under constant conditions. City birds started earlier had faster but less robust oscillation locomotor than conspecifics. Circadian period length predicted start in field, relationship was mainly explained fast-paced early-rising birds. Although based on only two populations, our findings point links life, chronotype phenotype songbirds, potentially other colonize urban habitats, highlight environments can significantly modify biologically important rhythms wild organisms.

Язык: Английский

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Insect photoperiodic calendar and circadian clock: Independence, cooperation, or unity?

Journal of Insect Physiology, Год журнала: 2010, Номер 57(5), С. 538 - 556

Опубликована: Ноя. 3, 2010

Язык: Английский

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