数字农科院2.0

转基因玉米连续种植对土壤丛枝菌根真菌群落的影响

文献类型: 中文期刊

作者: 刘仟龙;刘瑞华;李刚;修伟明;杨殿林;刘红梅;赵建宁

作者机构:

关键词: 转基因玉米;丛枝菌根真菌;PCR-DGGE;PLFA;群落结构

期刊名称:中国农学通报

ISSN: 1000-6850

年卷期: 2024 年 40 卷 29 期

页码:

收录情况: 科技核心(2024版) ; ; 农林核心(2020版)

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。

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