Issue:ISSN 2095-1353
CN 11-6020/Q
Director:Chinese Academy of Sciences
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2012年49 No.6
Progress in research on cold hardening in insects
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Key Words：rapid cold hardening，cold acclimation，cryoprotectants，cold shock，hot shock proteins
Abstract：Cold hardiness is crucial for the establishment， dispersion and distribution of insectpopulationsConsequently，the cold tolerance strategies of insects have become a popular research topic． Cold hardening，as aneffective cold tolerance strategy，can remarkably improve the chill tolerance of insects． This paper introduces two basicforms of cold hardening; rapid cold hardening and cold acclimation，and their respective roles in insect cold shockresistance． Cold hardening mechanisms are summarized from both macroscopic and microcosmic perspectives，includingtheir specificity at the tissue and cell levels，the increased level of low-molecular weight cryoprotectants，the expressionand function of specific protective proteins such as hot shock proteins and the underlying mechanism of blocking coldinducedapoptosis etc． Differences in reported results due to different research methods are discussed and thecomprehensive and integrated effects of the two types of cold hardening are emphasized． In addition，correlations anddifferences between the two types of cold hardening are analyzed in order to better reveal intrinsic mechanisms of coldhardening ininsects．