《环境昆虫学报》

作者	单位
董亚新，裴佳禾，邵钰莹，宗世祥，侯泽海	1. 北京林业大学林木有害生物防治北京市重点实验室，北京 100083 2. 山东省潍坊市自然资源和规划局，山东潍坊 261000

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中文摘要:

为明确红脂大小蠹 Dendroctonus valens LeConte 的耐寒能力以及主要耐寒物质，对越冬期幼虫和成虫的过冷却点及冰点进行了测定，同时对越冬期及非越冬期幼虫和成虫体内的抗冻保护物质进行了测定。结果表明，越冬期幼虫和成虫的过冷却点差异不显著，分别为-18.34 ± 0.26℃ 和 -18.59 ± 0.63℃，冰点差异显著，分别为-10.17 ± 0.36℃和-15.90 ± 0.70℃。越冬期幼虫体内脂肪、甘油、海藻糖和山梨醇含量均显著高于非越冬期幼虫，水分、糖原和蛋白质含量差异不显著; 越冬期成虫体内糖原、甘油、海藻糖和山梨醇含量均显著高于非越冬期成虫，水分、脂肪和蛋白质含量差异不显著。甘油、海藻糖、山梨醇是红脂大小蠹幼虫和成虫的主要抗冻保护物质，在越冬过程中发挥重要作用; 此外，脂肪在红脂大小蠹幼虫越冬过程中也发挥重要作用，糖原在红脂大小蠹成虫越冬过程中发挥重要作用。

英文摘要:

To clarify the cold resistance capacity and main cold-tolerant substances of Dendroctonus valens LeConte，the supercooling point and freezing point of overwintering larvae and adults were measured，and the antifreeze in overwintering and non-overwintering larvae and adults protected substances were measured. Results showed that there was no significant difference between the supercooling point of larvae -18.34 ± 0.26℃ and adults -18.59 ± 0.63℃ in wintering period，whereas the freezing point was significantly different between larvae -10.17 ± 0.36℃ and adults -15.90 ± 0.70℃ in wintering period. The contents of fat，glycerol，trehalose and sorbitol in overwintering larvae were significantly higher than those in non-overwintering larvae，and there were no significant differences in the contents of water，glycogen and protein. The contents of glycogen，glycerol，trehalose and sorbitol in overwintering adults were significantly higher than those in non-overwintering adults，and there were no significant differences in water，fat and protein. The results showed that the glycerol，trehalose and sorbitol were the main antifreeze protective substances of the larvae and adults of D. valens，which may play an important role in the overwintering period. Moreover，fat plays an important role in the overwintering period of larvae and glycogen plays an important role in the overwintering period of adults.

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