浙江农业科学 ›› 2025, Vol. 66 ›› Issue (5): 1145-1150.DOI: 10.16178/j.issn.0528-9017.20240161

• 经济作物 • 上一篇    下一篇

柠檬酸对镉污染土壤中亚麻根际微生物的影响

柳婷婷(), 李文略, 骆霞虹, 邹丽娜, 陈常理, 朱关林, 安霞()   

  1. 浙江省园林植物与花卉研究所,浙江 杭州 311251
  • 收稿日期:2024-03-01 出版日期:2025-05-11 发布日期:2025-05-20
  • 通讯作者: 安霞(1986—),女,山东泰安人,副研究员,博士,从事土壤重金属修复研究,E-mail:anxia@zaas.ac.cn
  • 作者简介:柳婷婷(1990—),女,山东青岛人,助理研究员,博士,从事土壤重金属修复研究,E-mail:liutt@zaas.ac.cn
  • 基金资助:
    萧山区重大科技计划项目(2021219);财政部和农业农村部国家麻类现代农业产业技术体系(CARS-16-S05)

Effect of citric acid on rhizosphere microorganisms of flax in cadmium-contaminated soil

LIU Tingting(), LI Wenlue, LUO Xiahong, ZOU Lina, CHEN Changli, ZHU Guanlin, AN Xia()   

  1. Zhejiang Institute of Landscape Plants and Flowers, Hangzhou 311251, Zhejiang
  • Received:2024-03-01 Online:2025-05-11 Published:2025-05-20

摘要:

本研究在生理成熟期取亚麻根际土壤,利用16S rRNA基因高通量测序技术和生物信息学的方法,分析不同浓度柠檬酸处理对亚麻根际土壤细菌的多样性、丰富度和群落结构等的影响。试验结果表明,高浓度柠檬酸处理后的亚麻根际土壤细菌的ACE、Chao1、Simpson和Shannon指数值均为最高,其中ACE和Chao1指数值显著大于对照;PCoA分析结果表明,高浓度柠檬酸处理后的亚麻根际土壤细菌OTU组成与对照土壤细菌OTU组成之间的群落结构差异最大;从细菌组成来看,所有处理的优势菌门均为髌骨细菌门,平均占比为49.50%,优势菌属均为TM7a,平均占比为32.99%。本试验有助于为后续研究外源有机酸对亚麻镉吸收的影响提供一定的理论依据。

关键词: 柠檬酸, 亚麻, 根际土壤, 细菌

Abstract:

In this study, the rhizosphere soil was taken at the physiological maturity stage of flax, and the effects of different concentrations of citric acid on the diversity, abundance and community structure of bacteria in the rhizosphere soil of flax were analyzed by 16S rRNA gene high-throughput sequencing technology and bioinformatics methods. The results showed that the ACE, Chao1, Simpson and Shannon index values of bacteria in the rhizosphere soil of flax treated with high concentration of citric acid were the highest, and the ACE and Chao1 index values were significantly higher than the control. The results of PCoA analysis showed that the community structure of bacterial OTU in the rhizosphere soil of flax treated with high concentration citric acid was the most different from that in the control soil. In terms of bacterial composition, all the dominant bacteria phylum was Patescibacteria, with an average proportion of 49.50%, and all the dominant bacteria genus was TM7a, with an average proportion of 32.99%. This experiment is helpful to provide a theoretical reference for the subsequent study of the effect of exogenous organic acids on the absorption of cadmium in flax.

Key words: citric acid, flax, rhizosphere soil, bacteria

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