纳米银对潮土玉米根际真菌群落结构和多样性的影响

发布时间：2018-03-25 09:17

本文选题：根际真菌　切入点：群落结构　出处：《菌物学报》2017年05期

【摘要】：根际真菌是土壤生态系统的重要组成部分,本研究采用土壤盆栽方法,以纳米银(silver nanoparticles,Ag NPs)为研究对象,利用Illumina高通量测序技术对不同Ag NPs施加水平下(0.025、0.25、2.5mg/kg)潮土玉米根际真菌群落结构进行分析。结果表明,潮土玉米根际土壤真菌群落主要由子囊菌门Ascomycota、担子菌门Basidiomycota、芽枝菌门Blastodimycota、壶菌门Chytridiomycota、球囊菌门Glomeromycota和接合菌门Zygomycota等组成,其中以子囊菌门真菌为优势类群。Ag NPs在2.5mg/kg施加水平下显著降低了(P0.05)玉米根际土壤溶解性有机碳(DOC)含量,改变了根际土壤真菌群落结构,使真菌群落结构发生显著分异(P0.05),主要表现为降低了根霉菌属Rhizopus、镰刀菌属Fusarium、被孢霉属Mortierella等的相对丰度。相关性分析表明土壤DOC含量的变化与Ag NPs处理下根际土壤真菌群落结构分异存在显著的(P0.05)相关性。
[Abstract]:Rhizosphere fungi are an important part of soil ecosystem. Illumina high throughput sequencing technique was used to analyze the community structure of maize rhizosphere fungi at different levels of Ag NPs, 0.25mg / kg, 0.25mg / kg, and 0.25mg / kg, respectively. The soil fungi community of maize rhizosphere in fluvo-soil is mainly composed of Ascomycota, Basidiomycotaa, Blastodimycotaa, Chytridiomycota, Glomeromycota and Zygomycota. Among them, ascomycetes as dominant group. AG NPs significantly decreased the content of dissolved organic carbon (DOC) in maize rhizosphere soil under the 2.5mg/kg application level, and changed the structure of rhizosphere soil fungi community. The results showed that the relative abundance of Rhizopus, Fusarium and Mortierella in Rhizopus, Fusarium and Mortierella were decreased. The correlation analysis showed that the changes of soil DOC content and the rhizosphere soil under Ag NPs treatment were true. There was a significant correlation between community structure differentiation and community structure differentiation (P0.05).
【作者单位】：中国科学院南京土壤研究所土壤与农业可持续发展国家重点实验室;中国科学院南京土壤研究所-香港浸会大学土壤与环境联合开放实验室;中国科学院大学;
【基金】：国家自然科学基金(41371255,41301267,41271256)~~
【分类号】：S154.3

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