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| Characteristics of phosphorus solubilizing bacterial communities in the rhizosphere of rice at different growth stages |
| Received:January 17, 2024 |
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| KeyWord:rice;growth period;phosphorus-solubilizing bacteria;phoD gene;Hedley phosphorus grading |
| Author Name | Affiliation | E-mail | | WU Shuqin | School of Environmental Science and Engineering, Changzhou University, Changzhou 213164, China | | | HU Min | School of Environmental Science and Engineering, Changzhou University, Changzhou 213164, China | humin@cczu.edu.cn | | XUE Yingang | School of Environmental Science and Engineering, Changzhou University, Changzhou 213164, China | | | YU Huanyun | Institute of Eco-environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou 510650, China | | | YAN Song | Rice National Engineering Laboratory(Nanchang), Jiangxi Academy of Agricultural Sciences, Nanchang 330200, China | | | TANG Shanshan | School of Environmental Science and Engineering, Changzhou University, Changzhou 213164, China | | | GU Haoyu | School of Environmental Science and Engineering, Changzhou University, Changzhou 213164, China | |
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| Abstract: |
| To assess the effects of rhizosphere soil bacteria on phosphorus availability at various rice growth stages, we studied four varieties：Huanghuazhan, Guiyefeng, Zhongkezaofajing No. 1, and Sasanishiki. Soil samples from the rhizosphere were gathered at the flowering and maturity phases. We used high-throughput sequencing to examine the rhizosphere phosphate-solubilizing bacterial community, particularly the phoD gene. The study also investigated correlations with soil physicochemical characteristics and phosphorus fractions. The results showed that Pseudomonadaceae（23.52% ± 31.03%）and Nitrobacteraceae（11.69% ± 5.07%）dominated the rice rhizosphere as phosphorus solubilizing bacteria. Bacterial diversity at maturity, with Chao1 index of 105.03±9.75 and Shannon index of 1.79±0.13, was significantly greater compared to that flowering stage, which had Chao1 index of 99.23±19.43 and Shannon index of 1.50± 0.55. Soil pH, available phosphorus, and total nitrogen were key factors affecting the phosphorus solubilizing bacterial community structure. Significant correlations between the relative abundances of Halomonadaceae, Phyllobacteriaceae, and Burkholderiaceae with different phosphorus fractions underscored their roles in the rice rhizosphere phosphorus cycle. |
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