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分离对植物病原真菌玉米窄斑壳霉和大孢窄斑壳霉具有抗真菌活性的细菌。

Isolation of bacteria with antifungal activity against the phytopathogenic fungi Stenocarpella maydis and Stenocarpella macrospora.

作者信息

Petatán-Sagahón Iván, Anducho-Reyes Miguel Angel, Silva-Rojas Hilda Victoria, Arana-Cuenca Ainhoa, Tellez-Jurado Alejandro, Cárdenas-Álvarez Isabel Oyuki, Mercado-Flores Yuridia

机构信息

Universidad Autónoma de Chapingo, Km. 38.5 Carretera México-Texcoco. Chapingo. Estado de México, CP 56230, Mexico; E-Mail:

出版信息

Int J Mol Sci. 2011;12(9):5522-37. doi: 10.3390/ijms12095522. Epub 2011 Aug 29.

DOI:10.3390/ijms12095522
PMID:22016606
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC3189730/
Abstract

Stenocarpella maydis and Stenocarpella macrospora are the causal agents of ear rot in corn, which is one of the most destructive diseases in this crop worldwide. These fungi are important mycotoxin producers that cause different pathologies in farmed animals and represent an important risk for humans. In this work, 160 strains were isolated from soil of corn crops of which 10 showed antifungal activity against these phytopathogens, which, were identified as: Bacillus subtilis, Pseudomonas spp., Pseudomonas fluorescens, and Pantoea agglomerans by sequencing of 16S rRNA gene and the phylogenetic analysis. From cultures of each strain, extracellular filtrates were obtained and assayed to determine antifungal activity. The best filtrates were obtained in the stationary phase of B. subtilis cultures that were stable to the temperature and extreme pH values; in addition they did not show a cytotoxicity effect against brine shrimp and inhibited germination of conidia. The bacteria described in this work have the potential to be used in the control of white ear rot disease.

摘要

玉蜀黍狭壳柱孢菌和大孢狭壳柱孢菌是玉米穗腐病的病原菌，玉米穗腐病是全球该作物中最具破坏性的病害之一。这些真菌是重要的霉菌毒素产生菌，会在养殖动物中引发不同病症，对人类也构成重大风险。在这项研究中，从玉米作物土壤中分离出160株菌株，其中10株对这些植物病原菌表现出抗真菌活性，通过16S rRNA基因测序和系统发育分析将它们鉴定为：枯草芽孢杆菌、假单胞菌属、荧光假单胞菌和成团泛菌。从每个菌株的培养物中获得细胞外滤液，并检测其抗真菌活性。最佳滤液是在枯草芽孢杆菌培养物的稳定期获得的，这些滤液对温度和极端pH值稳定；此外，它们对卤虫没有细胞毒性作用，并能抑制分生孢子的萌发。这项研究中描述的细菌有潜力用于防治白穗腐病。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ecba/3189730/70221ff55ade/ijms-12-05522f8.jpg
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