Halophytes increase rhizosphere microbial diversity, network complexity and function in inland saline ecosystem

Salinization is an important global environmental problem influencing sustainable development of terrestrial ecosystems. Salt-tolerant halophytes are often used as a promising approach to remedy the saline soils. Yet, how rhizosphere microbes' association and functions vary with halophytes in s...

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Published in:The Science of the total environment 2022-07, Vol.831, p.154944-154944, Article 154944
Main Authors: Qiu, Liping, Kong, Weibo, Zhu, Hansong, Zhang, Qian, Banerjee, Samiran, Ishii, Satoshi, Sadowsky, Michael J., Gao, Jianlun, Feng, Changzeng, Wang, Jingjing, Chen, Chunliang, Lu, Tianhui, Shao, Mingan, Wei, Gehong, Wei, Xiaorong
Format: Article
Language:English
Subjects:
Halophytes rhizosphere
Inland saline ecosystem
Microbial diversity
Microbial functions
Network complexity
Salinization
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Summary:Salinization is an important global environmental problem influencing sustainable development of terrestrial ecosystems. Salt-tolerant halophytes are often used as a promising approach to remedy the saline soils. Yet, how rhizosphere microbes' association and functions vary with halophytes in saline ecosystems remains unclear, restricting our ability to assess the role of halophytes in remedying saline ecosystems. Herein, we examined bacterial and fungal diversities, compositions, and co-occurrence networks in the rhizospheres of six halophytes and bulk soils in a semiarid inland saline ecosystem, and related these parameters to microbial functions. The microbiomes were more diverse and complex and microbial activity and residues were higher in rhizospheres than bulk soils. The connections of taxa in the rhizosphere microbial communities increased with fungi-fungi and bacteria-fungi connections and fungal diversity. The proportion of the fungi-related central connections were larger in rhizospheres (13–73%) than bulk soils (3%). Moreover, microbial activity and residues were significantly correlated with microbial composition and co-occurrence network complexity. These results indicated that enhanced association between fungi and bacteria increased microbial co-occurring network complexity in halophytes rhizosphere, which contributed to the higher microbial functions (microbial activities and residue) in this inland saline ecosystem. [Display omitted] •Rhizospheres of halophytes had higher microbial diversity than bulk soil.•Rhizospheres of halophytes had more complex network than bulk soil.•Rhizospheres of halophytes increased the microbial hierarchical interactions.•Rhizospheres of halophytes increased the microbial activity and residues retention.
ISSN:0048-9697
1879-1026
DOI:10.1016/j.scitotenv.2022.154944