数字农科院2.0

Improved biocontrol performance of acid-tolerant Pseudomonas koreensis CLP-23 against Ralstonia solanacearum causing tobacco wilt

文献类型： 外文期刊

作者： Zhang, Guozheng;Lin, Wei;Liu, Jianyang;Lin, Yong;Ye, Chao;Liu, Tianbo;Jing, Wang

作者机构：

关键词： Tobacco wilt;Antagonistic activity;PGP properties;Plant growth promotion;Soil enzyme activity

期刊名称： BIOLOGICAL CONTROL

ISSN： 1049-9644

年卷期： 2025 年 212 卷

页码：

收录情况： SCIE（2025版）

摘要： Pseudomonas koreensis, a subgroup of the P. fluorescens complex, is a potential plant growth-promoting rhizobacterium. The aim of this study was to evaluate the biocontrol effects of Pseudomonas koreensis CLP-23 against R. solanacearum under acidic conditions, both in vitro and in vivo. P. koreensis CLP-23 had an antagonistic activity against R. solanacearum, with the strongest antagonism at pH 5.5. Additionally, P. koreensis CLP-23 enhanced the plant growth-promoting (PGP) characteristics, including protease production, indole-3-acetic acid synthesis, and phosphate solubilization, particularly at a pH of 5.5. In pot and field, P. koreensis CLP-23 improved biomass accumulation and enhanced bioccontrol efficacy to tobacco wilt in soils with pH 5.5, respectively. Morover, P. koreensis CLP-23 significantly enhanced phosphatase and urease activities as well as available phosphorus and potassium contents in the rhizosphere soil within 45 d post-inoculation. Our results indicated that an acidtolerant P. koreensis CLP-23 plays an important role in the tobacco wilt prevention, the process of growth enhancement under acidic soil.

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