生物
脂肽
枯萎病
生物病虫害防治
索拉尼链格孢菌
代谢物
植物病害
链格孢
杀菌剂
次生代谢物
芽孢杆菌(形态)
疫病疫霉菌
细菌
抗真菌
微生物学
植物
生物技术
生物化学
遗传学
基因
作者
Amarildo L. da Silva,Álefe Vitorino Borges,Hiago Antonio Oliveira da Silva,Iris Carolina Henrique de Lima Leite,Kaique S. Alves,Lívia Soman de Medeiros,Lucas M. Abreu
出处
期刊:Crop Protection
[Elsevier BV]
日期:2023-06-12
卷期号:172: 106317-106317
被引量:12
标识
DOI:10.1016/j.cropro.2023.106317
摘要
Bacillus strains used in plant disease control produce cyclic lipopeptides (LPs) with antifungal activities. The LP concentration in Bacillus-cell suspensions may be insufficient to protect aerial plant parts against phytopathogens and the de novo metabolite production by bacteria on leaf surfaces is limited, leading to inconsistent control results in the field. We investigated the use of LP-enriched crude organic extracts of Bacillus velezensis strain B157 for controlling early blight, a destructive tomato disease caused by Alternaria linariae. Liquid chromatography–tandem mass spectrometry-based LP dereplication and molecular networking analysis revealed a complex mixture of iturins, fengycins, and surfactins in the organic extract of B157. Fengycins and iturins showed a marked in vitro antifungal activity. Treating tomato plants with the organic extract significantly reduced the severity of early blight, attaining more than 90% of disease control efficacy in two independent greenhouse experiments. These results show the potential of using LP-enriched biochemical fungicides for plant disease control.
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