Extent of mismatch between the period of circadian clocks and light/dark cycles determines time‐to‐emergence in fruit flies

Yadav, Pankaj; Choudhury, Deepak; Sadanandappa, Madhumala K.; Sharma, Vijay Kumar

doi:10.1111/1744-7917.12126

Cited by 7 publications

(4 citation statements)

References 43 publications

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“…; Yadav et al. ). However, little is known about the potential interaction among temperature, photoperiod and circadian clock (among other potentially important factors such as humidity and light intensity).…”

Section: Discussionmentioning

confidence: 97%

Development of insects under fluctuating temperature: a review and case study

Shiao

Okuyama

2014

J Applied Entomology

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The relationship between temperature and the developmental rate of organisms is crucial for understanding a variety of biological processes. It is common to use an average‐based index of temperature, for example degree‐days, for examining the relationship; and relatively little attention has been given to the variance of temperature. In this study, we examined the importance of temperature fluctuation on the development of organisms by compiling published studies. Published studies have shown highly variable results where the developmental rate was sometimes higher and sometimes lower under static temperature compared with variable temperature. A laboratory experiment on Megaselia scalaris showed that M. scalaris developed faster under fluctuating temperature than static temperature. We tested an additive model to predict the effect of fluctuating temperature on development and found that the model was inadequate for making quantitative predictions. However, some qualitative predictions, for example temperature fluctuation has a positive or negative effect, can be successfully predicted by the additive model. Our results show that the effect of temperature on developmental rate is not completely additive and average‐based indices such as degree‐days cannot be used when quantitative predictions are required.

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Section: Discussionmentioning

confidence: 97%

Development of insects under fluctuating temperature: a review and case study

Shiao

Okuyama

2014

J Applied Entomology

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“…T -cycles shorter than the FRP of the organism are expected to delay phases of circadian rhythms (phase relationships with Zeitgeber), while T -cycles longer than the FRP of the organism advance phases of the circadian rhythms (Aschoff, 1965; Wheeler et al, 1993; Yadav et al, 2015). Therefore, we subjected our populations to a series of short (T20; LD10:10 and T22; LD11:11) and long (T28; LD14:14 and T26; LD13:13) T -cycles (Figure 4a-4c).…”

Section: Resultsmentioning

confidence: 99%

Evidence for Co-Evolution of Masking With Circadian Phase in Drosophila Melanogaster

et al. 2021

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Heritable variation in the timing of rhythmic events with respect to daily time cues gives rise to chronotypes. Despite its importance, the mechanisms (clock or non-clock) regulating chronotypes remain elusive. Using artificial laboratory selection for divergent phasing of emergence of adults from pupae, our group has derived populations of Drosophila melanogaster which are early and late chronotypes for eclosion rhythm. Several circadian rhythm characteristics of these populations have since been described. We hypothesized that our selection protocol has inadvertently resulted in selection for masking, a non-clock phenomenon, in the early chronotype due to the placement of our selection window (which includes the lights-ON transition). We designed experiments to discriminate between enhanced masking to light versus circadian clock mediated changes in determining enhanced emergence in the morning window in our early chronotypes. Using a series of phase-shift protocols, LD-DD transition, and T-cycle experiments, we find that our early chronotypes have evolved positive masking, and their apparent entrained phases are largely contributed by masking. Through skeleton T-cycle experiments, we find that in addition to the evolution of greater masking, our early chronotypes have also evolved advanced phase of entrainment. Furthermore, our study systematically outlines experimental approaches to examine relative contributions of clock versus non-clock control of an entrained behavior. Although it has previously been suggested that masking may confer an adaptive advantage to organisms, here we provide experimental evidence for the evolution of masking as a means of phasing that can complement clock control of an entrained behavior.

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“…T -cycles shorter than the FRP of the organism are expected to delay phases of circadian rhythms (phase relationships with zeitgeber) while T -cycles longer than the FRP of the organism advance phases of the circadian rhythms (Aschoff, 1965; Wheeler et al, 1993; Yadav et al, 2015). Therefore, we subjected our populations to a series of short (T20; LD10:10 and T22; LD11:11) and long (T28; LD14:14 and T26; LD13:13) T -cycles.…”

Section: Resultsmentioning

confidence: 99%

“…early flies consistently emerge close to lights-ON under both short and long T-cycles T-cycles shorter than the FRP of the organism are expected to delay phases of circadian rhythms (phase relationships with zeitgeber) while T-cycles longer than the FRP of the organism advance phases of the circadian rhythms (Aschoff, 1965;Wheeler et al, 1993;Yadav et al, 2015).…”

Section: Early Flies Attenuate and Delay Their Emergence Under Ddmentioning

confidence: 99%

Evidence for co-evolution of masking and circadian phase inDrosophila melanogaster

Ghosh

Sharma

Dansana

et al. 2020

Preprint

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Heritable variation in the timing or circadian phases of rhythmic events with respect to daily time cues gives rise to chronotypes. Despite its importance, the mechanisms (clock or non-clock) regulating chronotypes remain elusive. Using artificial laboratory selection for divergent phasing of emergence of adults from pupae, our group has derived populations of Drosophila melanogaster which are early and late chronotypes for eclosion rhythm. Several circadian rhythm characteristics of these populations have since been described. We hypothesized that our selection protocol has inadvertently resulted in selection for masking, a non-clock phenomenon, in the early chronotype due to the placement of our selection window (which includes the lights-ON transition). Based on theoretical predictions and previous studies on our populations, we designed experiments to discriminate between enhanced masking to light versus circadian clock mediated changes in determining enhanced emergence in the morning window in our early chronotypes. Using a series of phase-shift protocols, LD-DD transition, and T-cycle experiments, we find that our early chronotypes have evolved positive masking, and their apparent entrained phases are largely contributed by masking. Through skeleton T-cycle experiments, we find that in addition to the evolution of greater masking, our early chronotypes have also evolved advanced phase of entrainment. Furthermore, our study systematically outlines experimental approaches to examine relative contributions of clock versus non-clock control of an entrained behavior. Although it has previously been suggested that masking may confer an adaptive advantage to organisms, here we provide experimental evidence for the evolution of masking as a mean of phasing of an entrained rhythm that can complement clock control of an entrained behavior.

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Extent of mismatch between the period of circadian clocks and light/dark cycles determines time‐to‐emergence in fruit flies

Cited by 7 publications

References 43 publications

Development of insects under fluctuating temperature: a review and case study

Development of insects under fluctuating temperature: a review and case study

Evidence for Co-Evolution of Masking With Circadian Phase in Drosophila Melanogaster

Evidence for co-evolution of masking and circadian phase inDrosophila melanogaster

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