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从解淀粉芽孢杆菌 PPL 中分离得到的丰原菌素同工型对番茄枯萎病菌的抗真菌评价。

Antifungal evaluation of fengycin isoforms isolated from Bacillus amyloliquefaciens PPL against Fusarium oxysporum f. sp. lycopersici.

机构信息

Institute of Environmentally-Friendly Agriculture, Chonnam National University, Gwangju, 61186, Republic of Korea.

International Analysis Institute, Naju, 58325, Republic of Korea.

出版信息

Microb Pathog. 2020 Dec;149:104509. doi: 10.1016/j.micpath.2020.104509. Epub 2020 Sep 19.

Abstract

Bacillus amyloliquefaciens PPL is known to have a broad spectrum antifungal activity against plant pathogenic fungi. We focused on the cyclic lipopeptides (CLPs) extracted from the culture broth that are known to promote the ability and the efficiency of B. amyloliquefaciens PPL to control fungal diseases in pepper and tomato. In this study, the PPL strain exhibited enhanced culture yield and increased production of fengycin lipopeptides upon lecithin supplementation. The purified iturin A fraction from strain PPL exhibited higher antifungal activity (73 - 80%) against pepper anthracnose than fengycin fraction in vitro and in vivo. However, the control of tomato Fusarium wilt by the PPL strain was mainly attributed to fengycin lipopeptides. A comparison of liquid chromatography-mass spectrometry (LC-MS) and LC-tandem MS analysis of the filtrate, we found that the antifungal compounds against Fusarium wilt present in the strain PPL culture filtrate were a series of isoforms of fengycin (type F1, F2, and F3). The purified fengycin F1 type showed better antifungal activity against Fusarium wilt compared the other isoforms. To the best of our knowledge, this is the first study to report the antifungal activity of fengycin isoform types in the context of Fusarium wilt. The CLPs produced by the PPL strain are potential candidates for controlling fungal disease in tomato and pepper plants.

摘要

解淀粉芽孢杆菌 PPL 被广泛认为具有广谱抗真菌活性,可对抗植物病原真菌。我们专注于从培养物中提取的环状脂肽(CLPs),这些脂肽已知可提高解淀粉芽孢杆菌 PPL 控制辣椒和番茄真菌病害的能力和效率。在这项研究中,该 PPL 菌株在添加卵磷脂后表现出更高的培养产量和丰原素脂肽的产量增加。从 PPL 菌株中纯化的iturin A 组分在体外和体内对辣椒炭疽病的抗真菌活性(73-80%)均高于丰原素组分。然而,PPL 菌株对番茄枯萎病的控制主要归因于丰原素脂肽。通过液相色谱-质谱(LC-MS)和 LC-串联 MS 分析比较培养液,我们发现该 PPL 菌株培养液中的抗枯萎病化合物是一系列丰原素(F1、F2 和 F3 型)的同型物。与其他同型物相比,纯化的丰原素 F1 型对枯萎病表现出更好的抗真菌活性。据我们所知,这是首次报道丰原素同型物在番茄枯萎病中的抗真菌活性。PPL 菌株产生的 CLPs 是控制番茄和辣椒真菌病害的潜在候选物。

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