The Cryptochrome1 (cry1) Gene has Oscillating Expression Under Short and Long Photoperiods inSesamia nonagrioides

Kourti, Anna; Kontogiannatos, Dimitriοs

doi:10.15226/2576-4934/2/1/00111

Cited by 21 publications

(2 citation statements)

References 32 publications

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“…However, rhythmical expression patterns of the negative regulators per, tim, and cry2 have been investigated in seven species (identified here as genera): Chymomyza (51), Culex (39), Sarcophaga (15,28), Nasonia (5,43), Acyrthosiphon (3,9), Pyrrhocoris (19,29) and Sesamia (26,27,30). In Sarcophaga crassipalpis, Culex pipiens, and Sesamia nonagrioides, per and tim mRNA levels peaked in the nights of both long-and short-night cycles and appeared to take their time cue from the L-to-D transition, thereby indicating night-length measurement; these rhythms also persisted in DD but with some dampening.…”

Section: The Role Of Circadian Clock Genes In Photoperiodic Inductionmentioning

confidence: 99%

Dormancy, Diapause, and the Role of the Circadian System in Insect Photoperiodism

Saunders

2020

Annu. Rev. Entomol.

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Whole-animal experiments devised to investigate possible association between photoperiodic time measurement and the circadian system (Bünning's hypothesis) are compared with more recent molecular investigations of circadian clock genes. In Sarcophaga argyrostoma and some other species, experimental cycles of light and darkness revealed a photoperiodic oscillator, set to constant phase at dusk and measuring night length repeatedly during extended periods of darkness. In some species, however, extreme dampening revealed an unrepetitive (i.e., hourglass-like) response. Rhythms of clock gene transcript abundance may also show similar phase relationships to the light cycle, and gene silencing of important clock genes indicates that they play a crucial role in photoperiodism either alone or in concert. However, the multiplicity of peripheral oscillators in the insect circadian system indicates that more complex mechanisms might also be important.

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Section: The Role Of Circadian Clock Genes In Photoperiodic Inductionmentioning

confidence: 99%

Dormancy, Diapause, and the Role of the Circadian System in Insect Photoperiodism

Saunders

2020

Annu. Rev. Entomol.

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“…Light is a major zeitgeber responsible for the circadian clock to synchronize with the daily environmental light/dark cycle (Emery et al, 1998;Helfrich-Förster et al, 2001). The CRY1 acts as a blue-light photoreceptor for entrainment of the circadian clock, and the transcription of cry1 is affected by light (Emery et al, 1998;Yan et al, 2013;Chang et al, 2017Chang et al, , 2019Tokuoka et al, 2017;Kourti & Kontogiannatos, 2018;Ueda et al, 2018). The Drosophila mutant for cry1 still displays a circadian locomotor rhythm but manifests a reduced entrainment to light/dark cycles (Stanewsky et al, 1998;Helfrich-Förster et al, 2001).…”

Section: Introductionmentioning

confidence: 99%

Knockout of cryptochrome 1 disturbs the locomotor circadian rhythm and development of Plutella xylostella

Chen

Wang

et al. 2022

Insect Science

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Cryptochrome 1 (CRY1) functions as a light-responsive photoreceptor, which is crucial for circadian rhythms. The identity and function of CRY1 in Plutella xylostella remain unknown. In this study, cry1 was cloned and identified in P. xylostella. Then, a cry1-knockout strain (Cry1-KO) of P. xylostella with a 2-bp deletion was established from the strain Geneva 88 (G88) using the CRISPR/Cas9 technology. No daily temporal oscillation of cry1 was observed in G88 and Cry1-KO, and cry1 mean daily transcription of Cry1-KO was lower than that of G88. Both G88 and Cry1-KO demonstrated rhythmic locomotion under the light/dark condition with Cry1-KO being more active than G88 in the daytime, whereas Cry1-KO completely lost rhythmicity under constant darkness. The developmental period of pre-adult of Cry1-KO was longer than that of G88; the lifespan of the Cry1-KO male adult was shorter than that of G88; the fecundity of Cry1-KO was lower than that of G88; and Cry1-KO showed lower intrinsic rate of increase (r), net reproduction rate (R 0 ), finite increase rate (λ), and longer mean generation time (T) than G88. Our results indicate that cry1 is involved in the regulation of locomotor circadian rhythm and development in P. xylostella, providing a potential target gene for controlling the pest and a basis for further investigation on circadian rhythms in lepidopterans.

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Circadian clock genes and photoperiodic diapause in the moth Sesamia nonagrioides

Kourti

Kontogiannatos

Gkouvitsas

et al. 2023

Comparative Biochemistry and Physiology Part B: Biochemistry an

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The Cryptochrome1 (cry1) Gene has Oscillating Expression Under Short and Long Photoperiods inSesamia nonagrioides

Abstract: The Cryptochrome1 (cry1) Gene has Oscillating Expression Under Short and Long Photoperiods in Sesamia nonagrioides Copyright: © 2018 Kourti A, et al. transcriptional regulation of these four clock genes maybe play important roles in the diapause programming in MCSB.

Cited by 21 publications

References 32 publications

Dormancy, Diapause, and the Role of the Circadian System in Insect Photoperiodism

Dormancy, Diapause, and the Role of the Circadian System in Insect Photoperiodism

Knockout of cryptochrome 1 disturbs the locomotor circadian rhythm and development of Plutella xylostella

Circadian clock genes and photoperiodic diapause in the moth Sesamia nonagrioides

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