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盐胁迫对不同品种水稻根际土壤细菌多样性与结构的影响

文献类型: 中文期刊

作者: 周玉杰 1 ; 贺治洲 1 ; 胡伟 1 ; 林秋云 1 ; 林越辉 1 ; 龙开意 1 ; 谢振宇 1 ;

作者机构: 1.中国热带农业科学院热带作物品种资源研究所

关键词: 水稻;盐胁迫;根际土壤;细菌群落;16S rRNA

期刊名称: 热带作物学报

ISSN: 1000-2561

年卷期: 2025 年 46 卷 003 期

页码: 754-763

收录情况: 北大核心 ; CSCD

摘要: 盐分是制约沿海滩涂盐渍化土地利用的主要因素之一,水稻(Oryza sativa L.)是盐渍化土地利用的首选粮食作物,而某些根际微生物可以提高水稻的抗盐能力。本研究选取不同品种水稻在NaCl胁迫下进行全生育期培育,采用Illumina Miseq测序技术,测定并分析不同品种水稻根际土壤细菌群落多样性和结构,旨在筛选适宜盐渍化土地种植的水稻品种。结果表明:就根际土壤细菌群落多样性而言,0.6%NaCl处理下,B3和B6品种的物种丰富度显著高于B1品种。根际土壤细菌群落结构方面,不同浓度NaCl处理下,B1、B3和B6品种的相对丰度大于10%的优势细菌门均为绿弯菌门(Chloroflexi)、变形菌门(Proteobacteria)和放线菌门(Actinobacteriota);不同品种水稻根际土壤细菌群落结构存在差异,富集的物种数量和种类也不同,0.6%NaCl处理下B6品种富集了14个细菌类群分支,如酸杆菌门(Acidobacteriae)、念珠藻科(Nostocaceae)、Vicinamibacterales、热微菌目(Thermomicrobiales)、KD4-96等。因此,沿海滩涂盐渍化土地种植B6品种水稻有利于根际土壤优势细菌群落的形成。

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