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首页> 外文期刊>Applied Soil Ecology >Anti-fungal activity of bacterial endophytes associated with legumes against Fusarium solani: Assessment of fungi soil suppressiveness and plant protection induction
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Anti-fungal activity of bacterial endophytes associated with legumes against Fusarium solani: Assessment of fungi soil suppressiveness and plant protection induction

机译：抗真菌食体与豆腐菌相关的抗真菌活性：真菌土壤抑制性和植物保护诱导的评估

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Legumes (Fabacea) plants are mainly known for their symbiotic relationship with soil nitrogen-fixing bacteria (rhizobia). This symbiosis requires the formation of new root structures called nodules. Besides rhizobia, nodules host several microbial species that may serve to enhance plant growth and disease resistance. In this study, we demonstrate that several endophytic bacteria isolated from nodules harbour plant growth promotion and bio-control traits. A collection of 120 bacterial strains isolated from Faba bean (Vicia faba) and chickpea (Cicer arietinum) nodules were screened for their ability to inhibit phytopathogenic Fusarium solani on "In vitro" antibiosis tests. Sixteen best effective isolates were selected, identified and sequences were deposited in Genbank. These strains were all isolated from Faba bean nodules. These have the characteristics to produce siderophores and auxin as well as expression of some genes coding the production of the antibiotic compounds as Pyrrolnitrin (PRN), Phenazine (PHZ)... Based on the former PGPR and biocontrol characteristics, three strains; Rahnella aquatilis B16C, Pseudomonas yamanorum B12 and Pseudomonas fluorescens B8P were analyzed for their "In vivo" biocontrol potential in suppressing F. solani root rot of three cultivars of Faba bean under greenhouse conditions. The three strains significantly reduced the pathogen symptom severity. R. aquatilis B16C showed the best protecting potentiality with the three Faba bean cultivars and it is consequently, suggested as biocontrol agent for field application. Then again, our study confirms previous suggestion of legume nodules as untapped suitable source of beneficial microorganisms that can be used to control pathogens in a sustainable way.
机译：豆类（Fabacea）植物主要以其与土壤氮素固定细菌（根瘤菌）的共生关系而闻名。这种共生需要形成称为结节的新根结构。除了根瘤菌外，结节均宿主几种可用于提高植物生长和抗病性的微生物物种。在这项研究中，我们证明了来自结节港口植物生长促进和生物对照性状的几种内生细菌。从Faba Bean（vicia faba）和鹰嘴豆（Cicer arietinum）结节中分离的120个细菌菌株的集合被筛选它们在“体外”抗抗体试验上抑制植物致病镰刀菌菌菌。选择了16个最佳有效的分离物，鉴定和序列沉积在Genbank中。这些菌株均与Faba Bean Nodules分离。这些具有产生散发菌和生长素的特性以及将一些基因的表达，编码抗生素化合物的产生作为吡咯嗪（PRN），苯嗪（PHZ）......基于前PGPR和生物防治特征，三种菌株; Rahnella Aquatilis B16C，Pseudomonas Yamanorum B12和假单胞菌B8P在温室条件下抑制了三种品种的F.Solani Root腐烂的“体内”生物控制潜力。三种菌株显着降低了病原体症状严重程度。 R. Aquatilis B16C显示出具有三种Faba Bean品种的最佳保护潜力，因此建议作为野外应用的生物控制剂。然后，我们的研究证实了以前的豆科结节建议，作为未开发的合适的有益微生物来源，可用于控制可持续方式的病原体。

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