[Super-cooling ability and its relations to body's water and fat contents of overwintering Hyphantrian cunea (Lepidoptera: Arcidae) pupae].
The determinations of super-cooling ability and body' s water and fat contents of overwintering Hyphantria cunea pupae showed that during overwintering, the female and male H. cunea pupae had the similar change patterns in their cold-resistance ability, i.e., increased with decreasing air temperature, but their body's water and fat contents, super-cooling point (SCP), and freezing point (FP) differed at different overwintering stages. The SCP was significantly lower at pre- and mid-overwintering stages than at late-overwintering stage, while FP had less difference among the stages. The body's water content was significantly higher at mid-overwintering stage than at pre- and late-overwintering stages. Comparing with non-overwintering pupae, the overwintering pupae had significantly lower SCP and FP, but significantly higher body's water and total fat contents. Regression analysis showed that there was a negative relationship between the water content and the SCP of female and male pupae (P < 0.05).
College of Plant Protection, Shandong Agricultural University, Tai'an 271018, Shandong, China. juzhen0711@163.com
Zhen
Z
Ju
Ming-Gui
MG
Li
Zhi-E
ZE
Diao
Yong-Yu
YY
Xu
D000064:Acclimatization / Q000502:physiology; D000273:Adipose Tissue / Q000378:metabolism*; D000818:Animals; D001831:Body Temperature; D001834:Body Water / Q000378:metabolism*; D003080:Cold Temperature; D005260:Female; D005615:Freezing; D007915:Lepidoptera / Q000502:physiology*; D008297:Male; D011679:Pupa / Q000502:physiology; D012621:Seasons