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CO2浓度升高对黏虫的取食选择和能量贮存的影响

DOI: 10.7685/j.issn.1000-2030.2013.02.011, PP. 65-69

Keywords: CO2升高,食物选择,保护酶,能量贮存,气候变化生物学

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Abstract:

采用选择性和非选择性方法测定了黏虫幼虫对高CO2浓度下生长的小麦叶片的选择性;并观察了在高CO2浓度下连续生长至第7代后的幼虫存活情况,测定了老熟幼虫体内保护酶活性以及成虫能源贮存。结果表明在非选和可选情况下,3龄和4龄幼虫偏好当前CO2(390μL?L-1)条件下生长的小麦叶片,取食量比高CO2(780μL?L-1)条件下提高26.7%和30.3%(非选择性测定)或是高CO2下的4.2倍和1.6倍(选择性测定),6龄幼虫未表现出显著的取食偏好。高CO2处理下连续饲养至第7代的幼虫孵化至化蛹的存活率显著低于当前CO2处理,主要差异表现在4龄之后,但老熟幼虫体内的保护酶活性和蛋白质含量在当前和升高CO2处理之间没有显著差异。升高CO2处理可显著降低第7代成虫甘油三酯含量和体干质量,使体内水分含量明显增多;但对肌肉干质量和糖原无显著影响。上述结果说明CO2浓度升高对黏虫幼虫存活和成虫迁飞所需能量贮存具有不利影响。

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