img

官方微信

高级检索

中国沙漠 ›› 2025, Vol. 45 ›› Issue (1): 249-258.DOI: 10.7522/j.issn.1000-694X.2024.00174

• • 上一篇    

连古城自然保护区3种盐爪爪属( Kalidium )植物根际土壤细菌群落结构

周膂卓1(), 常宗强2,3, 吴雨霞1()   

  1. 1.兰州大学 生态学院,甘肃 兰州 730000
    2.中国科学院西北生态环境资源研究院 干旱区生态安全与可持续发展重点实验室,甘肃 兰州 730000
    3.内蒙古巴丹吉林荒漠生态系统国家定位观测研究站,内蒙古 阿拉善右旗 737300
  • 收稿日期:2024-10-10 修回日期:2024-12-11 出版日期:2025-01-20 发布日期:2025-01-13
  • 通讯作者: 吴雨霞
  • 作者简介:吴雨霞(E-mail: wuyx@lzu.edu.cn
    周膂卓(1998—),男,山西武乡人,硕士研究生,主要从事分子生态学研究。E-mail: 18406594058@163.com
  • 基金资助:
    国家林业和草原局林业生态站监测运行补助项目;甘肃省林业和草原局科技计划项目(2022kj063)

Rhizobacterial community structures of three Kalidium species in the Liangucheng National Nature Reserve, China

Lüzhuo Zhou1(), Zongqiang Chang2,3, Yuxia Wu1()   

  1. 1.College of Ecology,Lanzhou University,Lanzhou 730000,China
    2.Key Laboratory of Ecological Safety and Sustainable Development in Arid lands,Northwest Institute of Eco-Environment and Resources,Chinese Academy of Sciences,Lanzhou 730000,China
    3.Inner Mongolia Badain Jaran Desert Ecosystem Research Station,Alxa Right Banner 737300,Inner Mongolia,China
  • Received:2024-10-10 Revised:2024-12-11 Online:2025-01-20 Published:2025-01-13
  • Contact: Yuxia Wu

摘要:

盐生植物在盐碱化土壤中的生长与适应受土壤环境的影响,进而通过根系分泌物招募相关微生物群落。本研究选择民勤连古城国家级自然保护区内片段化/局域化分布的3种盐爪爪属(Kalidium)植物——细枝盐爪爪(Kalidium gracile)、盐爪爪(Kalidium foliatum)和黄毛头(Kalidium sinicum),采用高通量测序技术,对3种植物根际土壤细菌群落的组成和多样性进行分析,并探讨其环境驱动因子。结果表明:3种植物分布区的土壤都属于盐碱土,盐爪爪和细枝盐爪爪的分布区域土壤主要含有硫酸盐和氯化物,而黄毛头的分布区土壤则以氯化物为主。3种植物根际土壤样品中变形菌门(Pseudomonadota)和拟杆菌门(Bacteroidota)为主要优势菌,细枝盐爪爪根际土壤样品的α-多样性指数显著高于其他两个种的样品,3种盐爪爪属植物根际土壤的11种关键生物标志物在不同植物中分布类群不同。根际土壤样品pH值与细菌多样性正相关,而黄杆菌目(Flavobacteriales)丰度与多种离子浓度负相关。根际土壤细菌群落中各优势细菌相对丰度在3种盐爪爪属植物分布区的差异性,与土壤总含盐量及主要盐离子含量正相关。土壤pH值和离子浓度变化是民勤连古城自然保护区3种盐爪爪属植物根际土壤细菌群落结构差异的关键因素,在一定程度上影响了3种盐生植物的区域性分布。

关键词: 盐爪爪属(Kalidium), 根际细菌, 盐离子, 耐盐性

Abstract:

The rhizosphere microbial community significantly influences the growth and adaptation of halophytic plants in saline-alkaline soils. In this study, we selected three species of the genus KalidiumKalidium gracileKalidium foliatum, and Kalidium sinicum—whose fragmented/localized distributions are found within the Minqin Liangu Cheng National Nature Reserve. Using high-throughput sequencing technology, we analyzed the composition and diversity of the rhizosphere soil bacterial communities associated with these three species and investigated their environmental driving factors. The results showed that the soils in the distribution areas of all three species were classified as saline-alkaline. The distribution areas of K. foliatum and K. gracile primarily contained sulfates and chlorides, while the soil in the distribution area of K. sinicum was predominantly chloride. The dominant phyla in the rhizosphere soil samples of all three species were Proteobacteria and Bacteroidota. Notably, the α-diversity index of the rhizosphere soil samples from K. gracile was significantly higher than those of the other two species. Additionally, the distribution of 11 key microbial biomarkers in the rhizosphere soils varied among the different species. A positive correlation was observed between the pH of the rhizosphere soil and bacterial diversity, while the abundance of Flavobacteriales exhibited a negative correlation with salt ion concentrations. The relative abundance of dominant bacteria in the rhizosphere soil communities across the three Kalidium species showed variation that was positively correlated with the total soil salinity and the concentrations of major salt ions. These findings suggest that changes in soil pH and ion concentrations are key factors contributing to the differences in the bacterial community structure of the rhizosphere soils associated with the three Kalidium species in the Minqin Liangu Cheng Nature Reserve, which, to some extent, influence the regional distribution of these halophytic plants.

Key words: Kalidium, rhizosphere bacteria, salt ions, salt tolerance

中图分类号: