Pedosphere (5): 820--833, 2025
ISSN 1002-0160/CN 32-1315/P
©2025 Soil Science Society of China
Published by Elsevier B.V. and Science Press
| Brackish water irrigation-induced recruitment of specific consortium determines microbial resistance that facilitates crop yield in a field experiment |
Qingxia WANG1,2, Jisheng XU1, Dandan LI1, Yunpeng ZHOU1,2, Meiqi CHEN5, Xiying ZHANG3, Jiabao ZHANG1, Bingzi ZHAO1,4 |
1 Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 (China)
2 University of Chinese Academy of Sciences, Beijing 100049 (China)
3 Center for Agricultural Resources Research, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Shijiazhuang 050022 (China)
4 University of Chinese Academy of Sciences, Nanjing, Nanjing 211135 (China)
5 School of Geography, Nanjing Normal University, Nanjing 210023 (China) |
| ABSTRACT |
| Crop productivity may be affected by soil salinization from brackish water irrigation. Plants host species-specific soil microorganisms that can enhance plant adaptability to salt stress. However, it is unclear whether these specific microorganisms recruited under brackish water irrigation are related to microbial resistance, which has been proven to promote crop production. A field experiment was conducted using five local wheat varieties, each of which was exposed to brackish or fresh water irrigation for four years. Brackish water irrigation tended to increase wheat yield by 6.38%-19.40%, although the increase in yield under brackish water relative to fresh water irrigation varied with wheat variety. The compositions of the bacterial and fungal communities in the bulk soil and rhizosphere were measured, and the taxa enriched following brackish water irrigation were isolated to investigate microbial resistance. We found that the resistance of each wheat variety was determined by specifically recruited microbial taxa with relevant functions. The yield incremental rates were positively regulated by microbial resistance from the bulk soil and rhizosphere. Moreover, the resistance from the bulk soil and rhizosphere had similar effects, and microbial consortia containing both beneficial and harmful taxa determined microbial resistance. These results indicated that brackish water irrigation-induced recruitment of specific microbial taxa from either the bulk soil or the rhizosphere or both positively contributed to the yield incremental rate and provided a list of key taxa linked to the magnitude of yield variation caused by brackish water irrigation. |
| Key Words: bulk soil,crop productivity,microbial community,resistance index,rhizosphere,salt stress,soil salinization |
| Citation: Wang Q X, Xu J S, Li D D, Zhou Y P, Chen M Q, Zhang X Y, Zhang J B, Zhao B Z. 2025. Brackish water irrigation-induced recruitment of specific consortium determines microbial resistance that facilitates crop yield in a field experiment. Pedosphere. 35(5):820-833. |
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