INDUCTION OF DIAPAUSE IN DROSOPHILA-MELANOGASTER - PHOTOPERIODIC REGULATION AND THE IMPACT OF ARRHYTHMIC CLOCK MUTATIONS ON TIME MEASUREMENT
INDUCTION OF DIAPAUSE IN DROSOPHILA-MELANOGASTER - PHOTOPERIODIC REGULATION AND THE IMPACT OF ARRHYTHMIC CLOCK MUTATIONS ON TIME MEASUREMENT
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DOI：
10.1073/pnas.86.10.3748
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发表时间：
1989-05-01
影响因子：
11.1
通讯作者：
GILBERT, LI
中科院分区：
文献类型：
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作者：
SAUNDERS, DS;HENRICH, VC;GILBERT, LI
果蝇表现出受光周期调节的卵巢滞育。新交配的雌性苍蝇(广东-S野生型)暴露在12摄氏度(或10摄氏度)的短日照(<；每天14小时)下，进入相当浅的生殖滞育。在相同的低温下，暴露在长日照(每天16小时)下的雌性会经历卵巢成熟。在12℃的10：14光/暗周期下，短白天诱导的滞育持续6-7周，但在转移到更高的温度(18或25℃)或长白天(18：6光/暗周期)后迅速终止。来自Period(PER)基因座等位基因纯合的三个品系的雌性果蝇，据说行为昼夜节律不齐，具有两个重叠的Per缺失的雌性果蝇也能够区分长日和短日，尽管与野生型果蝇相比，临界日长被.apprxeq移到了较短的值。2小时。结果表明，周期轨迹在光周期时间测量中没有因果关系。
The fruit fly Drosophila melanogaster displays an ovarian diapause that is regulated by photoperiod. Newly eclosed female flies (Canton-S wild type) exposed to short days (< 14 hr of light per day) at 12.degree.C (or 10.degree.C) enter a fairly shallow reproductive diapause. Females exposed to long days (16 hr of light per day) at the same low temperature undergo ovarian maturation. The short day induced diapause continues for 6-7 weeks under a 10:14 light/dark cycle at 12.degree.C but is terminated rapidly after a transfer to higher temperature (18 or 25.degree.C) or to long days (18:6 light/dark cycle). Females from three strains homozygous for alleles of the period (per) locus, reportedly arrhythmic for behavioral circadian rhythms, and females that possessed two overlapping deletions of per were also capable of discriminating between long and short days, although, when compared with the wild-type flies, the critical day length was shifted to shorter values by .apprxeq. 2 hr. It is concluded that the period locus is not causally involved in photoperiod time measurement.