Optimal Low Temperature and Chilling Period for Both Summer and Winter Diapause Development in Pieris melete: Based on a Similar Mechanism

文献类型： 外文期刊

第一作者： Chen, Chao

作者： Chen, Chao;Xue, FangSen;Xiao, HaiJun;Wu, ShaoHui

作者机构：

期刊名称：PLOS ONE （ 影响因子：3.24； 五年影响因子：3.788 ）

ISSN： 1932-6203

年卷期： 2013 年 8 卷 2 期

页码：

收录情况： SCI

摘要： The cabbage butterfly, Pieris melete hibernates and aestivates as a diapausing pupa. We present evidence that the optimum of low temperature and optimal chilling periods for both summer and winter diapause development are based on a similar mechanism. Summer or winter diapausing pupae were exposed to different low temperatures of 1, 5, 10 or 15 degrees C for different chilling periods (ranging from 30 to 120 d) or chilling treatments started at different stages of diapause, and were then transferred to 20 degrees C, LD12.5:11.5 to terminate diapause. Chilling temperature and duration had a significant effect on the development of aestivating and hibernating pupae. The durations of diapause for both aestivating and hibernating pupae were significantly shorter when they were exposed to low temperatures of 1, 5 or 10 degrees C for 50 or 60 days, suggesting that the optimum chilling temperatures for diapause development were between 1 and 10 degrees C and the required optimal chilling period was about 50-60 days. Eighty days of chilling was efficient for the completion of both summer and winter diapause. When chilling periods were >= 90 days, the durations of summer and winter diapause were significantly lengthened; however, the adult emergence was more synchronous. The adaptive significance of a similar mechanism on summer and winter diapause development is discussed.

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