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首页> 外文期刊>Plant Pathology >Diversity, plant growth-promoting traits, and biocontrol potential of fungal endophytes of Sorghum bicolor
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Diversity, plant growth-promoting traits, and biocontrol potential of fungal endophytes of Sorghum bicolor

机译：高粱真菌内生物体的多样性，植物生长促进性状和生物防治潜力

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摘要

The diversity of fungal endophytes in Sorghum bicolor was investigated in samples collected from 10 different geographical regions of Karnataka state, India. A total of 360 endophytes were isolated from leaf, stem, and root tissues and were assigned to 26 fungal species based on morphology and molecular characterization using ITS sequences. All the endophytes belonged to the phylum Ascomycota. The diversity (Shannon H, 2.57; Simpson_1-D, 0.92) and species richness (Margalef's, 4.68; Menhinick, 3.61) were found to be higher for the endophytes isolated from leaf tissues. The species evenness of the endophytic assemblage was strongly influenced by tissue type, followed by geographical location. The biocontrol potential of isolated endophytes was evaluated against economically destructive sorghum grain mould pathogens such as Fusarium thapsinum, Epicoccum sorghinum, Alternaria alternata, and Curvularia lunata using the dual culture method. Biocontrol potential was exhibited by 26 endophytic isolates, of which Trichoderma asperellum recorded broad-spectrum activity against target pathogens, followed by E. nigrum and A. longipes. Most (82%) endophytes showed plant growth-promoting traits. Biosynthesis of indole-3-acetic acid (IAA) was observed in 84% of isolates, and phosphate solubilization, siderophore production, and cellulase activity was observed in 69%, 23%, and 27% of isolates, respectively. Seeds treated with T. asperellum exhibited a significantly higher seed vigour index (2096), germination percentage (94%), and yield under greenhouse and field conditions. The results were substantiated by the confocal microscopy analysis, which clearly demonstrated the colonization of treated endophyte in root tissues. The present study reveals an ecofriendly approach to explore T. asperellum in sorghum disease management.
机译：研究了来自印度的10个不同地理区域的样品中，研究了高粱双子石中的真菌内心细胞的多样性。从叶，茎和根组织中分离出总共360个内心细胞，并根据使用其序列的形态分配给26种真菌物种。所有内心属于ascomycota的所有内心细胞。多样性（Shannon H，2.57; Simpson_1-D，0.92）和物种丰富度（Margalef，4.68; Menhinick，3.61）对叶组织分离的内心体积更高。内生组合的物种均匀性受组织类型的强烈影响，其次是地理位置。孤立的内心细胞的生物控制潜力是针对经济上破坏的高粱谷物模具病原体，例如镰刀菌，癫痫菌，患有双重培养方法的镰刀菌，表征嗜睡症，exclatia anderata和Curvularia Lunata。挥发性分离物展出的生物控制潜力，其中Trichoderma asperellum记录了针对靶病原体的广谱活性，其次是E. nigrum和A. Hongipes。大多数（82％）内心细胞显示出植物生长的特征。在84％的分离株中观察到吲哚-3-乙酸（IAA）的生物合成，分别观察到磷酸盐溶解，纤维素产生和纤维素酶活性分别以69％，23％和27％的分离物观察。用T. asperellum处理的种子表现出显着更高的种子活力指数（2096），萌发百分比（94％），以及温室和现场条件下的产率。结果由共聚焦显微镜分析证实，其清楚地证明了根组织中治疗的内心细胞的定植。本研究揭示了Ecofriendly探讨了高粱疾病管理中的T.Sperellum。

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