1. Phosphate-solubilising bacteria promote horticultural plant growth through phosphate solubilisation and phytohormone regulation.
- Author
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Zhao, Yu, Liu, Sicen, He, Bing, Sun, Min, Li, Jishou, Peng, Rong, Sun, Liangliang, Wang, Xiaopeng, Cai, Youpeng, Wang, Hehe, and Geng, Xueqing
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PLANT growth promoting substances , *CUCUMBERS , *PLANT growth , *GLUCONIC acid , *ORGANIC acids , *OXALIC acid , *SUCCINIC acid , *AMMONIUM sulfate - Abstract
Microorganisms in the plant's rhizosphere are capable of solubilising insoluble soil phosphates and can promote plant growth. In this study, a total of 30 bacteria were isolated from soils in Changji city, and one highly efficient strain (B5) was identified as a member of Pseudomonadaceae. B5 exhibited phosphorus (P) solubilisation of 519.66 mg/L in a culture medium containing tricalcium phosphate (Ca3 (PO4)2). Results showed that strain B5 had a high P utilisation rate in a medium containing glucose (monosaccharide), ammonium sulphate and tricalcium phosphate. B5 treatment significantly promoted plant growth and increased the dry weight, the chlorophyll content as well as P content of tomato, marigold and cucumber. Moreover, B5 produced plant growth-promoting hormones, including indole-3-acetic acid (IAA) (4.18 g/L) and gibberellin (GA) (19.8 mg/L). In addition, organic acids including oxalic acid, succinic acid, gluconic acid, arabic-hexanoic acid and glutraic acid were produced by B5 under different phosphorus sources. Our results indicated that B5 is a potential candidate for development as a bioinoculant for horticultural application. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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