Isolation of the inorganic phosphorus-solubilizing bacteria Lysinibacillus sphaericus and assessing its role in promoting rice growth

文献类型: 外文期刊

第一作者: Pan, Lin

作者: Pan, Lin;Xu, Qingshan;Wei, Qianqian;Kong, Yali;Zhu, Lianfeng;Tian, Wenhao;Yan, Yulian;Wang, Hangfeng;Chi, Chunxin;Zhang, Junhua;Zhu, Chunquan

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关键词: Rice; Phosphorus; Enzyme activity; pH; Phosphorus-solubilizing bacteria

期刊名称:INTERNATIONAL MICROBIOLOGY ( 影响因子:3.1; 五年影响因子:3.2 )

ISSN: 1139-6709

年卷期: 2024 年

页码:

收录情况: SCI

摘要: Soluble phosphorus scarcity severely limits plant growth and crop yield. In this study, a strain of inorganic phosphorus-solubilizing bacteria, Lysinibacillus sphaericus, was isolated from rice rhizosphere soil. The available phosphorus content in liquid inorganic phosphorus identification medium and in L. sphaericus-inoculated soil increased from 204.28 mg/L to 1124.68 mg/L and from 4.75 mg/kg to 7.04 mg/kg, respectively. The pH decreased significantly from 6.87 to 6.14. Incubation with L. sphaericus significantly increased malic and succinic acid content in the liquid inorganic phosphorus identification medium and increased acid phosphatase and alkaline phosphatase activity in the soil. Inoculation with L. sphaericus significantly increased rice growth, chlorophyll a/b content, and photosynthesis by increasing the soluble phosphorus content in the rice rhizosphere soil under phosphorus-deficient conditions. Further analysis revealed that L. sphaericus improved soil phosphorus release by decreasing soil pH and promoting acid phosphatase and alkaline phosphatase activity. This study supports the production of microbial fertilizers to improve rice yield in phosphorus-deficient conditions.

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