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- W2367714488 abstract "【Objective】The objective of this study is to understand the seasonal changes of cold hardiness of Chrysopa pallens(Rambur) prepupa in the natural conditions.【Method】The wet weight,supercooling point(SCP) and freezing point(FP),the contents of water,fat,sugar and protein in the prepupa body were determined in different times.【Result】The SCP and FP of Ch.pallens prepupa were the lowest in January 2010(mid-winter period),-17.53 and-7.14℃,respectively,and the highest in July,-8.21 and-3.65℃,respectively.The SCP and FP of prepupa in September and October of 2009(pre-winter period) were not significantly lower than that in July of 2010(growth period) and lower than that in April and May of 2010(post-winter periods).The change patterns of the contents of the water,sugar and protein in the prepupa were similar as that of SCP with decreasing first and increasing later from September 2009 to July 2010,but the changes of content of fat were on the contrary,with higher fat content during winter and lower in other seasons.The highest fat content in prepupa was 46.81% in November 2009(pre-winter period) and the lowest was 31.07% in July 2010(growth period).【Conclusion】The cold hardiness of Ch.pallens prepupa varied obviously with seasonal changes,and pre-and mid-winter prepupa had higher cold tolerance than those in the summer and post-winter.The results suggest that the cold hardiness of the prepupa may be related to the contents of water and some biochemical substances in the prepupa body in the natural conditions." @default.
- W2367714488 created "2016-06-24" @default.
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- W2367714488 date "2012-01-01" @default.
- W2367714488 modified "2023-09-25" @default.
- W2367714488 title "Seasonal Changes in the Cold Hardiness of Chrysopa pallens(Rambur) Prepupa" @default.
- W2367714488 hasPublicationYear "2012" @default.
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