数字农科院2.0

Contribution of K solubilising bacteria (Burkholderia sp.) promotes tea plant growth (Camellia sinesis) and leaf polyphenols content by improving soil available K level

文献类型： 外文期刊

作者： Zhang, Xianchen;Wang, Ningning;Hou, Mengmeng;Wu, Honghong;Jiang, Hong;Zhou, Ziwen;Chang, Na;Wang, Qianqian;Wan, Xiaochun;Jiang, Jiayue;Shen, Zhougao;Li, Yeyun

作者机构：

关键词： K level;K solubilisation bacteria;polyphenol;pot experiment;pryuvic acid;tartaric acid;tea;theaflavin

期刊名称： FUNCTIONAL PLANT BIOLOGY

ISSN： 1445-4408

年卷期： 2022 年

页码：

收录情况： SCIE（2022版）

摘要： K+ availability is important for growth and quality of tea (Camellia sinesis L.). K solubilising bacteria convert insoluble K to available K. This study was conducted to screen K solubilising bacteria isolated from tea rhizosphere soil in Qimen county, Anhui province, China. The maximum K solubilisation colony (the ratio of diameter halo/colony was 2.54) was identified as Burkholderia sp. (storage number: M2021105) by biochemistry and molecular analysis. Pot experiments (Laterite) showed that the inoculation of Burkholderia sp. significantly improved tea plant height (Zhongcha108, 1 year old) and total polyphenols content by 21.14% and 21.58% compared with the control, respectively. Higher polyphenol level promoted the formation of theaflavin in the fermentation experiments. Further experiments showed that tartaric acid and pryuvic acid produced by Burkholderia sp. are important components associated with K solubilisation in vitro. Burkholderia sp. significantly increased soil available K by 15.12%; however, there was no significant difference in available N and P, and Cu, Mg, Zn and Ca compared with the control. K content in inoculated tea roots and leaves was significantly higher (50% and 10%, respectively) than the control. Compared with the control, exogenous supply of 60 mg kg(-1) K significantly increased levels of polyphenol (53.97%), theaflavin (16.31%), theaflavin-3-gallate (20%), theaflavin 3'-gallic acid ester (32.24%) and theaflavin 3,3'-gallic acid ester (40.95%). Due to its ability to enable higher available soil K, ur study indicated that Burkholderia sp. have potential to increase total polyphenols content be a bio-inoculant for biofortification of tea.

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