Influence of soil moisture on supercooling capacity and associated physiological parameters of overwintering larvae of rice stem borer

文献类型： 外文期刊

第一作者： Han, Yongqiang

作者： Han, Yongqiang;Lin, Wei

作者机构：

关键词： Chilo suppressalis;glycerol;supercooling point

期刊名称：ENTOMOLOGICAL SCIENCE （ 影响因子：1.602； 五年影响因子：1.35 ）

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年卷期：

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收录情况： SCI

摘要： Influence of soil moisture on the supercooling capacity and associated physiological parameters of overwintering larvae of the rice stem borer Chilo suppressalis was examined by exposing larvae to soil moistures of 25, 50, 75 and 100% of saturated soil water content (SSWC) at ambient temperature for 30 d from December 2007 to January 2008 in Beijing, China. At the end of the exposure, supercooling points (SCPs) varied significantly among the treatments, the lowest being in the larvae exposed to soil moisture of 25% SSWC. Fresh weight was significantly higher in the larvae exposed to soil moisture of 100% SSWC than in those kept at 25 and 50% SSWC. Dry weight and body water content (% fresh weight) were not different among the treatments. Glucose and trehalose contents were markedly lower, and glycerol content was significantly higher in the larvae confined to soil moisture of 25% SSWC than in those exposed to the other soil moisture treatments. It is suggested that variation in body water content (% fresh weight) contributes to the differences in SCPs of the overwintering C. suppressalis larvae in all treatments, but the influence of soil moisture treatments on supercooling capacity are caused through changes in glycerol content.

分类号： Q96

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