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| Rhizosphere soil bacterial community composition in soybean genotypes and feedback to soil P availability |
ZHOU Tao1*, WANG Li1*, DU Yong-li1, LIU Ting1, LI Shu-xian1, GAO Yang1, LIU Wei-guo1, YANG Wen-yu1, 2 |
1 College of Agronomy, Sichuan Agricultural University, Chengdu 611130, P.R.China
2 Key Laboratory of Crop Ecophysiology and Farming System in Southwest, Ministry of Agriculture, Chengdu 611130, P.R.China |
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Abstract Soil with low phosphorus (P) availability and organic matter contents exists in large area of southwest of China, but some soybean genotypes still show well adaptations to this low yield farmland. However, to date, the underlying mechanisms of how soybean regulates soil P availability still remains unclear, like microbe-induced changes. The objective of the present study was to compare the differences of rhizosphere bacterial community composition between E311 and E109 in P-sufficiency (10.2 mg kg–1) and P-insufficiency (5.5 mg kg–1), respectively, which then feedback to soil P availability. In P-sufficiency, significant differences of the bacterial community composition were observed, with fast-growth bacterial phylum Proteobacteria, genus Dechloromonas, Pseudomonas, Massilia, and Propionibacterium that showed greater relative abundances in E311 compared to E109, while in P-insufficiency were not. A similar result was obtained that E311 and E109 were clustered together in P-insufficiency rather than in P-sufficiency by using principal component analysis and hierarchical clustering analysis. The quadratic relationships between bacterial diversity and soil P availability in rhizosphere were analyzed, confirming that bacterial diversity enhanced the soil P availability. Moreover, the high abundance of Pseudomonas and Massilia in the rhizosphere of E311 might increased the P availability. In the present study, the soybean E311 showed capability of shaping rhizosphere bacterial diversity, and subsequently, increasing soil P availability. This study provided a strategy for rhizosphere management through soybean genotype selection and breeding to increase P use efficiency, or upgrade middle or low yield farmland.
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Received: 21 June 2018
Accepted:
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| Fund: This work was supported by the National Key Research and Development Program of China (2016YFD0300109-3) and the National Natural Science Foundation of China (31671626, 31771728). The authors also wish to thank Gan Jianyang (Sichuan Agricultural University) who participated in the chemical analysis. |
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Corresponding Authors:
Correspondence LIU Wei-guo, Tel: +86-28-86290960, E-mail: lwgsy@126.com; YANG Wen-yu, E-mail: mssiyangwy@sicau.edu.cn
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| About author: * These authors contributed equally to this study. |
Cite this article:
ZHOU Tao, WANG Li, DU Yong-li, LIU Ting, LI Shu-xian, GAO Yang, LIU Wei-guo, YANG Wen-yu.
2019.
Rhizosphere soil bacterial community composition in soybean genotypes and feedback to soil P availability. Journal of Integrative Agriculture, 18(10): 2230-2241.
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