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中国农学通报 ›› 2024, Vol. 40 ›› Issue (29): 65-74.doi: 10.11924/j.issn.1000-6850.casb2024-0062

• 资源·环境·生态·土壤·气象 • 上一篇    下一篇

转基因玉米连续种植对土壤丛枝菌根真菌群落的影响

刘仟龙1(), 刘瑞华1,2, 李刚1, 修伟明1, 杨殿林1, 刘红梅1(), 赵建宁1()   

  1. 1 农业农村部环境保护科研监测所,天津 300191
    2 中国农业科学院棉花研究所,河南安阳 455000
  • 收稿日期:2024-01-12 修回日期:2024-07-21 出版日期:2024-10-15 发布日期:2024-10-14
  • 通讯作者:
    刘红梅,女,1976年出生,河北沧州人,高级工程师,博士,主要从事转基因作物土壤环境安全评价方面的研究。通信地址:300191 天津市南开区复康路31号 农业农村部环境保护科研监测所,Tel:022-23611820,E-mail:
    赵建宁,男,1981年出生,陕西西安人,研究员,博士,主要从事生物多样性与生态农业研究。通信地址:300191 天津市南开区复康路31号 农业农村部环境保护科研监测所,Tel:022-23611820, E-mail:
  • 作者简介:

    刘仟龙,男,2000年出生,湖南邵阳人,硕士研究生,研究方向:农业面源污染与生态治理。通信地址:300191 天津市南开区复康路31号 农业农村部环境保护科研监测所,Tel:022-23611820,E-mail:

  • 基金资助:
    “国家转基因重大专项”(2016ZX08012005-005)

Effects of Continuous Planting of Transgenic Maize on Community of Arbuscular Mycorrhizal Fungi in Soil

LIU Qianlong1(), LIU Ruihua1,2, LI Gang1, XIU Weiming1, YANG Dianlin1, LIU Hongmei1(), ZHAO Jianning1()   

  1. 1 Agro-environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191
    2 Institute of Cotton Research of Chinese Academy of Agricultural Sciences, Anyang, Henan 455000
  • Received:2024-01-12 Revised:2024-07-21 Published:2024-10-15 Online:2024-10-14

摘要:

为评估转基因玉米连续种植对土壤丛枝菌根真菌群落结构的影响,以转基因玉米DBN9936和其受体玉米DBN318为材料,采用PCR-DGGE技术和PLFA技术分析土壤AM真菌群落结构特征。结果表明:在相同的种植年份和地点下,转基因和非转基因玉米的土壤AM真菌群落结构表现出较高的相似性,其香农-威纳指数、Pielou均匀度指数和丰富度均未出现显著性差异,且优势属均为Clomus(球囊霉属)。聚类分析结果显示,同一种植地点下的2种玉米土壤中AM真菌群落的相似度大多在0.60以上,而不同地点的群落相似度均小于0.60;同时,不同种植地点的两种玉米非常清晰的分布在聚类图的上下两侧,说明土壤AM真菌群落结构受种植地点影响较大,而转基因本身对其影响较为微弱。系统发育分析结果表明,不同地点下种植的两种玉米的特有条带在系统发育树上聚类在不同的类群。土壤微生物PLFA含量结果显示,转基因玉米DBN9936的种植对土壤微生物的总PLFA含量均未产生显著影响,各微生物类群的相对丰度差异也较小;而在不同种植地点下两种玉米土壤微生物的总PLFA含量均有显著性差异,且各微生物类群的相对丰度差异较大。综上,转基因玉米DBN9936较之对应的非转基因玉米对土壤AM真菌群落结构和PLFA含量无显著影响,但不同种植地点之间存在差异。

关键词: 转基因玉米, 丛枝菌根真菌, PCR-DGGE, PLFA, 群落结构

Abstract:

To evaluate the effect of continuous planting of transgenic maize on the community structure of soil arbuscular mycorrhizal fungi, transgenic maize DBN9936 and its non-transgenic counterpart were used as the experimental materials, the characteristics of soil arbuscular mycorrhizal (AM) fungal community structure were analyzed using PCR-DGGE and PLFA techniques. The results indicated that there was a high similarity in the soil AM fungal community structure between transgenic and non-transgenic maize in the same planting year and location. There were no significant differences in the Shannon-Wiener index, Pielou evenness index and richness. The dominant genera consistently identified were Glomus. Cluster analysis revealed that the similarity of AM fungal communities in soils from the two maize types at the same planting location was mostly above 0.60, while the similarity between communities from different locations was below 0.60. Additionally, the clustering pattern clearly separated the two maize types from different planting locations on the upper and lower sides of the cluster diagram, indicated that the community structure of soil AM fungi was greatly affected by planting sites, while the influence of the transgenic itself was weak. Phylogenetic analysis also indicated that the specific bands of the two maize species planted in different locations clustered in different groups on the phylogenetic trees. The results of soil microbial PLFA content showed that the planting of transgenic maize DBN9936 had no significant effect on the total soil microbial PLFA content, and the differences in the relative abundance of microbial groups were small. In contrast, significant differences were observed in the total PLFA content of soil microbes between the two maize types planted at different locations, with substantial variations in the relative abundance of microbial groups. In conclusion, compared to non-transgenic maize, transgenic maize DBN9936 had no significant impact on the structure of soil AM fungal communities and PLFA content. However, notable differences were observed among different planting locations.

Key words: transgenic maize, arbuscular mycorrhizal fungi, PCR-DGGE, PLFA, community structure