Journal
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
Volume 69, Issue 11, Pages 3390-3400Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.jafc.1c00210
Keywords
various saline-alkaline soils; soluble salt ion components; microbial assemblages; keystone microbial taxa; microbiome ecological functions; multivariate analysis
Funding
- National Natural Science Foundation of China [31860170, 41977113]
- Major Science and Technology Projects in Inner Mongolia Autonomous Region [ZDZX2018054]
- Natural Science Foundation of Inner Mongolia [2018MS04003]
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The study revealed differences in adaptability between bacterial and fungal communities under saline-alkaline stress, with fungi showing higher tolerance, stability, and resilience. Unique, dominant, and common microbial taxa were identified in three types of saline-alkaline soils, indicating the potential importance of unique and dominant microbial taxa in regulating saline-alkaline functions.
Land degraded by salinization and alkalization is widely distributed globally and involves a wide range of ecosystem types. However, the knowledge of the indigenous microbial assemblages and their roles in various saline-alkaline soils is limited. This study demonstrated microbial assemblages in various saline-alkaline soils from different regions of Inner Mongolia and revealed the key driving factors to influence microbiome. The correlation network analysis indicates the difference in adaptability of bacterial and fungal communities under stimulation by saline-alkaline stress: fungal community shows higher tolerance, stability, and resilience to various saline-alkaline soils than a bacterial community. The keystone bacteria and fungi that have potential adaptability to various saline-alkaline environments are further identified, and they may confer benefits in restoring saline-alkaline soils by their own effects or assisting plants. For salt-rich soils in different regions, the soluble salt ion components are the major determinant to drive microbial assemblages of different saline-alkaline soils, rather than salinity. Thus, these saline-alkaline soils are clustered into sulfated, chlorinated, and soda-type saline-alkaline soils. Multivariate analysis reveals unique, dominant, and common microbial taxa in three saline-alkaline soils. This result of the conceptual mode indicates that potential roles of unique and dominant microbial taxa on regulating saline-alkaline functions are more vital.
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