Title |
Cryptochrome Regulates Circadian Locomotor Rhythms in the Small Brown Planthopper Laodelphax striatellus (Fallén)
|
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Published in |
Frontiers in Physiology, February 2018
|
DOI | 10.3389/fphys.2018.00149 |
Pubmed ID | |
Authors |
Yan-Dong Jiang, Xin Yuan, Wen-Wu Zhou, Yue-Liang Bai, Gui-Yao Wang, Zeng-Rong Zhu |
Abstract |
Most living organisms have developed internal circadian clocks to anticipate the daily environmental changes. The circadian clocks are composed of several transcriptional-translational feedback loops, in which cryptochromes (CRYs) serve as critical elements. In insects, some CRYs act as photopigments to control circadian photoentrainment, while the others act as transcriptional regulators. We cloned and characterized twocryptochromegenes, theDrosophila-like (lscry1) and vertebrate-like (lscry2) genes, in a rice pestLaodelphax striatellus. Quantitative real-time PCR showed thatlscry1andlscry2expressed ubiquitously from nymph to adult stages as well as in different tissues. The transcript levels oflscry2fluctuated in a circadian manner. Constant light led to arrhythmic locomotor activities inL. striatellus. It also inhibited the mRNA oscillation oflscry2and promoted the transcription oflscry1. Knockdown oflscry1orlscry2by RNA interference (RNAi) reduced the rhythmicity ofL. striatellusin constant darkness, but not in light dark cycles. These results suggested thatlscry1andlscry2were putative circadian clock genes ofL. striatellus, involved in the regulation of locomotor rhythms. |
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