Influences of elevated CO2 and pest damage on the allocation of plant defense compounds in Bt‐transgenic cotton and enzymatic activity of cotton aphid
Influences of elevated CO2 and pest damage on the allocation of plant defense compounds in Bt‐transgenic cotton and enzymatic activity of cotton aphid
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DOI：
10.1111/j.1744-7917.2011.01429.x
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发表时间：
2011-08
期刊：
影响因子：
4
通讯作者：
Gang Wu;Fajun Chen;NENG-WEN Xiao;F. Ge
中科院分区：
文献类型：
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作者：
Gang Wu;Fajun Chen;NENG-WEN Xiao;F. Ge
摘要在开顶式温室中，研究了高CO2条件下，非转基因和转基因Bt棉对棉蚜Aphis gossypii（格洛弗）侵染的响应。结果表明，在CO2浓度升高的条件下，棉蚜对转Bt基因抗虫棉叶片氮素含量和Bt毒蛋白含量的影响显著。然而，在CO2浓度升高下，转Bt基因棉GK-12和非转Bt基因棉泗棉3号的碳氮比、缩合单宁和棉酚显著升高。CO2浓度和棉花品种显著影响棉花叶片氮、单宁和棉酚含量。棉花属CO2水平×侵染时间（24 h、48 h和72 h）的交互作用使棉花缩合单宁浓度显著增加，而CO2水平×棉花品种的交互作用使A体内真胆碱酯酶（TChE）浓度显著降低。棉皮。这项研究举例说明了预测转基因和非转基因植物在不同气候条件下如何分配防御化合物以应对食草昆虫的复杂性。植物防御化合物的分配模式和蚜虫酶的变化，在这项研究中观察到的似乎是广泛适用于在一系列的植物和草食性昆虫的相互作用，随着CO2大气的上升。
Abstract Plant allocation to defensive compounds by elevated CO2‐grown non‐transgenic and transgenic Bt cotton in response to infestation by cotton aphid, Aphis gossypii (Glover) in open‐top chambers under elevated CO2 were studied. The results showed that significantly lower foliar nitrogen concentration and Bt toxin protein occurred in transgenic Bt cotton with and without cotton aphid infestation under elevated CO2. However, significantly higher carbon/nitrogen ratio, condensed tannin and gossypol were observed in transgenic Bt cotton “GK‐12” and non‐transgenic Bt cotton ‘Simian‐3’ under elevated CO2. The CO2 level and cotton variety significantly influenced the foliar nitrogen, condensed tannin and gossypol concentrations in the plant leaves after feeding by A. gossypii. The interaction between CO2 level × infestation time (24 h, 48 h and 72 h) showed a significant increase in cotton condensed tannin concentrations, while the interaction between CO2 level × cotton variety significantly decreased the true choline esterase (TChE) concentration in the body of A. gossypi. This study exemplified the complexities of predicting how transgenic and non‐transgenic plants will allocate defensive compounds in response to herbivorous insects under differing climatic conditions. Plant defensive compound allocation patterns and aphid enzyme changes observed in this study appear to be broadly applicable across a range of plant and herbivorous insect interactions as CO2 atmosphere rises.