Chen Yanjun, Yang Junyi, Pan Libo, Liu Meng, Wang Qiuming, Xiao Nengwen, Guan Xiao
State Environmental Protection Key Laboratory of Regional Eco-Process and Function Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China.
School of Ecology & Environment, Renmin University of China, Beijing 100782, China.
Microorganisms. 2025 Aug 14;13(8):1892. doi: 10.3390/microorganisms13081892.
While genetically modified crops bring significant economic benefits, the environmental safety issues they may pose have also received increasing attention. To study the impact of planting genetically modified insect-resistant crops on soil ecosystems, this research employed methods such as 16S rDNA amplicon full-length sequencing, using transgenic insect-resistant corn HGK60 and its conventional counterpart Zheng 58 as subjects for a three-year continuous survey to analyze the effects of planting transgenic insect-resistant corn HGK60 on the rhizosphere bacterial community. The following results were obtained. (1) A total of 216 corn rhizosphere soil samples were annotated to 51 phyla, 119 orders, 221 families, and 549 genera. (2) Overall, there was no significant difference in the composition of the rhizosphere bacterial community between HGK60 and Zheng 58 at the phylum, class, order, or family levels ( > 0.05), and the planting of HGK60 did not significantly affect the relative abundance of rhizosphere probiotics ( > 0.05). Some differences appeared only briefly and were not reproducible. (3) Alpha and beta diversity analyses showed that overall, the planting of HGK60 had no significant impact on the structure of the rhizosphere bacterial community ( > 0.05). (4) Significant changes in the rhizosphere bacterial community were observed across different growth stages of corn. It can be concluded that the planting of HGK60 has no significant impact on the rhizosphere bacteria. This study provides valuable data support for the environmental safety assessment of genetically modified crops.
虽然转基因作物带来了显著的经济效益,但其可能引发的环境安全问题也日益受到关注。为研究种植转基因抗虫作物对土壤生态系统的影响,本研究采用16S rDNA扩增子全长测序等方法,以转基因抗虫玉米HGK60及其常规对照郑58为研究对象,进行了为期三年的连续调查,以分析种植转基因抗虫玉米HGK60对根际细菌群落的影响。得到以下结果:(1)共对216份玉米根际土壤样本进行注释,涉及51个门、119个目、221个科和549个属。(2)总体而言,HGK60和郑58在门、纲、目或科水平上的根际细菌群落组成无显著差异(>0.05),种植HGK60对根际益生菌的相对丰度无显著影响(>0.05)。一些差异仅短暂出现且不可重复。(3)α和β多样性分析表明,总体而言,种植HGK60对根际细菌群落结构无显著影响(>0.05)。(4)在玉米不同生长阶段观察到根际细菌群落有显著变化。可以得出结论,种植HGK60对根际细菌无显著影响。本研究为转基因作物的环境安全评估提供了有价值的数据支持。