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Influence of Bt Maize on Diversity and Composition of Non-target Arthropod Species

机译：Bt玉米对非目标节肢动物物种多样性和组成的影响

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Non-target arthropods may be affected by toxins derived from Bacillus thuringiensis (Bt) expressed in transgenic maize.The objective of this study was to evaluate the possible impacts of Bt maize on the diversity and the composition of non-target arthropod species by analyzing one field cultivated with conventional maize (no expressing transgenic protein) and three fields cultivated with transgenic maize (expressing Bt proteins).In each field was sampled 50 entirely plants for the number of arthropod specimens and registred the degree of injury caused by the chewing insects.A total of 2.525 specimens of arthropods, comprising 29 species from 25 families, were recorded on 3.000 sampled plants.The most diverse family belonged to the order Hemiptera.Based on Shannon and Simpson indexes, the Bt-transgenic cultivar EXP3320YG had lower level of non-target arthropod diversity than other cultivars.From this study, it is clear that the diversity of non-target arthropods on maize crop is negatively affected by Cry1Ab protein, while the Cry1A105+Cry2Ab2+Cry1F proteins, and Cry1A105+Cry2Ab2+Cry3Bb1 proteins do not have any effect on arthropod species diversity and composition.
机译：非目标节肢动物可能受到转基因玉米中表达的苏云金芽胞杆菌（Bt）毒素的影响。本研究的目的是通过分析一种Bt玉米对非目标节肢动物物种的多样性和组成可能产生的影响。常规玉米（不表达转基因蛋白）栽培的田间和转基因玉米（表达Bt蛋白）的田间三个田地。在每个田地中，对50株植物中的节肢动物标本总数进行了采样，并记录了咀嚼昆虫造成的伤害程度。在3000种采样植物中记录了2.525节节肢动物的标本，包括25个科的29个种，其中最多样化的科属于半翅目。根据Shannon和Simpson指数，Bt转基因品种EXP3320YG的非拟南芥含量较低。靶节肢动物的多样性要比其他品种高。从这项研究中可以明显看出，玉米作物上非靶节肢动物的多样性是负的受Cry1Ab蛋白影响最大，而Cry1A105 + Cry2Ab2 + Cry1F蛋白和Cry1A105 + Cry2Ab2 + Cry3Bb1蛋白对节肢动物物种多样性和组成没有任何影响。

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