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首页> 外文期刊>Applied and Environmental Microbiology >Different Effects of Transgenic Maize and Nontransgenic Maize on Nitrogen-Transforming Archaea and Bacteria in Tropical Soils
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Different Effects of Transgenic Maize and Nontransgenic Maize on Nitrogen-Transforming Archaea and Bacteria in Tropical Soils

机译：转基因玉米和非转基因玉米对热带土壤中氮素转化古细菌和细菌的不同影响

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摘要

The composition of the rhizosphere microbiome is a result of interactions between plant roots, soil, and environmental conditions. The impact of genetic variation in plant species on the composition of the root-associated microbiota remains poorly understood. This study assessed the abundances and structures of nitrogen-transforming (ammonia-oxidizing) archaea and bacteria as well as nitrogen-fixing bacteria driven by genetic modification of their maize host plants. The data show that significant changes in the abundances (revealed by quantitative PCR) of ammonia-oxidizing bacterial and archaeal communities occurred as a result of the maize host being genetically modified. In contrast, the structures of the total communities (determined by PCR-denaturing gradient gel electrophoresis) were mainly driven by factors such as soil type and season and not by plant genotype. Thus, the abundances of ammonia-oxidizing bacterial and archaeal communities but not structures of those communities were revealed to be responsive to changes in maize genotype, allowing the suggestion that community abundances should be explored as candidate bioindicators for monitoring the possible impacts of cultivation of genetically modified plants.
机译：根际微生物组的组成是植物根部，土壤和环境条件之间相互作用的结果。植物物种遗传变异对根相关微生物群组成的影响仍然知之甚少。这项研究评估了氮转化（氨氧化）古细菌和细菌以及由其玉米寄主植物的基因改造驱动的固氮细菌的丰度和结构。数据显示，由于对玉米寄主进行了基因改造，氨氧化细菌和古细菌群落的丰度发生了显着变化（通过定量PCR揭示）。相反，总群落的结构（由PCR变性梯度凝胶电泳确定）主要由土壤类型和季节等因素驱动，而不是由植物基因型驱动。因此，氨氧化细菌和古细菌群落的丰度被发现对玉米基因型的变化有反应，而氨氧化细菌和古细菌群落的结构却未被发现，这表明应该探索群落的丰度作为候选生物指示剂，以监测遗传栽培的可能影响。改性植物。

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