莎梵婷
生物膜
生物
群集运动
微生物学
脂肽
枯草芽孢杆菌
茄丝核菌
殖民地化
解淀粉芽孢杆菌
生物化学
细菌
植物
群体感应
发酵
遗传学
作者
Gajender Aleti,Sylvia Lehner,Markus Bacher,Stéphane Compant,Biljana Nikolić,Maja Plesko,Rainer Schuhmacher,Angela Sessitsch,Günter Brader
标识
DOI:10.1111/1462-2920.13405
摘要
Summary Cyclic lipopeptides (cLP) and especially surfactins produced by Bacillus spp. trigger biofilm formation and root colonization and are crucial for biocontrol activity and systemic resistance in plants. Bacillus atrophaeus 176s isolated from the moss Tortella tortuosa produces the cLP fengycins, iturins and surfactins, possesses antifungal activities and can protect tomato, lettuce and sugar beet against Rhizoctonia solani infection. In B. atrophaeus we identified for the first time the variant surfactin C, which differs from surfactin A produced by B. subtilis and B. amyloliquefaciens by an isoleucine instead of a leucine at position 7 of the lipopeptide backbone. The analysis of the complete surfactin gene clusters revealed that the dissimilarity is encoded in the adenylation domain of srfC and show that surfactin variations are distributed in a species‐specific manner in bacilli. We demonstrate that the surfactin A and C with subtle structural differences have varying signal strengths on biofilm formation and root colonization and act specifically on the respective producing strain. This became evident as biofilm formation and root colonization but not swarming motility in surfactin biosynthesis mutants was restored differentially in the presence of exogenously supplemented cognate and non‐cognate surfactin variants.
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