He Dan, Gao Congting, Zhao Shen, Chen Hongmin, Li Peng, Yang Xishan, Li Deping, Zhao Tingting, Jiang Hong, Liu Chongxi
Heilongjiang Academy of Land Reclamation Sciences, Harbin 150030, China.
College of Plant Protection, Northeast Agricultural University, Harbin 150030, China.
Microorganisms. 2024 Nov 6;12(11):2245. doi: 10.3390/microorganisms12112245.
Bacterial wilt triggered by the soil-borne pathogenic bacterium is one of the most serious diseases in tomato plants, leading to huge economic losses worldwide. Biological control is considered an environmentally friendly and sustainable way to manage soil-borne diseases. In this study, sp. STD57 isolated from the rhizosphere of showed strong antibacterial activity against . Pot experiments showed that strain STD57 exhibited a significant biocontrol effect (81.7%) on tomato bacterial wilt in the greenhouse environment. Furthermore, strain STD57 could inhibit the growth of weeds (, , and ) but promote the growth of crops (wheat, rice, and tomato). The plant growth-promoting substance was identified as indoleacetic acid (IAA) by high-pressure liquid chromatography-mass spectrometry and genome analysis. Coarse separation of the fermented extracts revealed that the antibacterial and herbicidal substances were mainly in the fermentation supernatant and belonged to different products. These findings suggested that strain STD57 may be a potential biocontrol and bioherbicide agent useful in agriculture.
由土壤传播的致病细菌引发的青枯病是番茄植株最严重的病害之一，在全球范围内导致巨大的经济损失。生物防治被认为是治理土壤传播病害的一种环境友好且可持续的方法。在本研究中，从[植物名称]根际分离出的[菌株名称]STD57对[病原菌名称]表现出强大的抗菌活性。盆栽试验表明，菌株STD57在温室环境中对番茄青枯病展现出显著的生物防治效果（81.7%）。此外，菌株STD57能够抑制杂草（[杂草名称1]、[杂草名称2]和[杂草名称3]）的生长，但促进作物（小麦、水稻和番茄）的生长。通过高压液相色谱 - 质谱联用和基因组分析，确定促进植物生长的物质为吲哚乙酸（IAA）。发酵提取物的初步分离显示，抗菌和除草物质主要存在于发酵上清液中，且属于不同产物。这些发现表明，菌株STD57可能是一种在农业中有用的潜在生物防治和生物除草剂制剂。
