Santos Ana P, Muratore Luciana Nieva, Solé-Gil Anna, Farías María E, Ferrando Alejandro, Blázquez Miguel A, Belfiore Carolina
Laboratorio de Investigaciones Microbiológicas de Lagunas Andinas (LIMLA), Planta Piloto de Procesos Industriales Microbiológicos (PROIMI-CONICET), Avenida Belgrano y Pasaje Caseros, Tucumán, Argentina.
Instituto de Biología Molecular y Celular de Plantas (IBMCP), Consejo Superior de Investigaciones Científicas, Universidad Politécnica de Valencia (CSIC-UPV), Avenida de los naranjos s/n, 46022 Valencia, Spain.
Biotechnol Rep (Amst). 2021 Sep 15;32:e00674. doi: 10.1016/j.btre.2021.e00674. eCollection 2021 Dec.
Extremophilic microorganisms were screened as biocontrol agents against two strains of (02 and 06). sp. AG3 and sp. S58 exhibited a potential antifungal effect on 02 growth, corresponding to 52.2% and 40.7% inhibition, respectively. This effect was confirmed by scanning electron microscopy, where images revealed marked morphological alterations in fungus hyphae. The bacteria were found to secrete lytic enzymes and polyamines. sp. S56a was the only strain able to reduce the growth of the two strains of through their supernatant. Antifungal supernatant activity was correlated with the ability of bacteria to synthesize and excrete putrescine, and the exogenous application of this polyamine to the medium phenocopied the bacterial antifungal effects. We propose that the combined secretion of putrescine, spermidine, and lytic enzymes by extremophilic microorganism predispose these microorganisms to reduce the disease severity occasioned by in soybean seedlings.
筛选嗜极微生物作为针对两种菌株（02和06）的生物防治剂。嗜麦芽窄食单胞菌AG3菌株和贪铜菌S58菌株对02菌株的生长表现出潜在的抗真菌作用，抑制率分别为52.2%和40.7%。扫描电子显微镜证实了这种作用，图像显示真菌菌丝有明显的形态改变。发现这些细菌能分泌裂解酶和多胺。贪铜菌S56a菌株是唯一能够通过其培养上清液抑制两种菌株生长的菌株。抗真菌上清液活性与细菌合成和分泌腐胺的能力相关，并且向培养基中外源添加这种多胺可模拟细菌的抗真菌作用。我们认为，嗜极微生物联合分泌腐胺、亚精胺和裂解酶，使得这些微生物能够减轻大豆幼苗中由[此处原文可能缺失某种病原体名称]引起的病害严重程度。
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