西藏飞蝗(Locusta migratoria tibetensis Chen)耐寒性理化指标  

The physiological and biochemical indexes of the cold-hardiness of Locusta migratoria tibetensis Chen

作　　者：李庆[1] 王思忠[1] 封传红[2] 张敏[1] 蒋凡[2] 杨刚 罗林明[2] 

机构地区：[1]四川农业大学农学院,雅安625014 [2]四川省农业厅植物保护站,成都610041 [3]甘孜州植保植检站,康定626000

出　　处：《生态学报》2008年第3期1314-1320,共7页Acta Ecologica Sinica

基　　金：四川省科技厅应用基础资助项目(05JY029-007);国家农业部西藏飞蝗发生规律与监测预警资助项目~~

摘　　要：西藏飞蝗是青藏高原上的一种重要害虫。近年来,西藏飞蝗在西藏、青海玉树以及川西高原上危害十分严重。通过对该虫各发育阶段过冷却能力测定,研究了各发育阶段虫体内生理生化物质与过冷却能力之间的关系,揭示了该虫耐寒性规律。结果表明,西藏飞蝗蝗卵的过冷却点和结冰点为最低,分别为-22.02℃和-16.36℃。在1-4龄蝗蝻期,过冷却点随体内水分、糖原和脂肪含量随着虫体的发育而升高,其过冷却点分别为-9.28℃、-8.51℃、-7.18℃、-6.46℃;到5龄蝗蝻时,虫体脂肪和糖原含量达最高值,过冷却点下降为-8.07℃。讨论了虫体脂肪、糖原和甘油含量变化与其耐寒力之间的关系。The Locusta migratoria tibetensis is an important pest in the Qing-Tibet Plateau.In recent years,it causes serious damage in Tibet,Yushu of Qinghai,plateau of western Sichuan.The super-cooling points of Locusta migratoria tibetensis were determined.The physiological and biochemical indexes related with the super-cooling capability were also determined.The results indicated the super-cooling point and the freezing point of the egg was the lowest,which was-22.02℃ and-16.36℃ respectively.The nmphs supercooling points increase with increase of hepatin,fat and glycerin content from 1 to 4 instar stage,which was-9.28℃、-8.51℃、-7.18℃、-6.46℃,respectively.However,the super-cooling point descends to-8.07℃ at 5^th instar stage,when the contents of fat,hepatin and glycerin were highest.The correlation between the contents of fat,hepatin and glycerin during different development stage and the super-cooling capacity in vivo was also discussed in detail.

关 键 词：西藏飞蝗 耐寒性 

分 类 号：Q968[生物学—昆虫学] S433[农业科学—农业昆虫与害虫防治]