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首页> 外文期刊>European Journal of Plant Pathology >In-vitro antagonism of Trichoderma spp. against Sclerotium rolfsii and Rhizoctonia solani and their response towards growth of cucumber, bottle gourd and bitter gourd
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In-vitro antagonism of Trichoderma spp. against Sclerotium rolfsii and Rhizoctonia solani and their response towards growth of cucumber, bottle gourd and bitter gourd

机译：木霉属菌的体外拮抗作用。菌对罗氏菌和茄子枯萎病及其对黄瓜，葫芦和苦瓜生长的响应

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In the current study we evaluated the production of potential growth-promoting metabolites (IAA, phosphate, siderophore) for 20 isolates of Trichoderma collected from different geographical locations of Chhattisgarh and assessed their growth response on cucumber, bottle gourd and bitter gourd. All the Trichoderma isolates were able to release inorganic phosphorus from tri-calcium phosphate and showed consistent ability to produce siderophores and indole-3-acetic acid (IAA). The production of these metabolites varied greatly within species. Using the same set of isolates we evaluated the production of potential cell wall degrading enzymes. Confrontation assays of Trichoderma isolates against two soilborne plant pathogens (Scelrotium rolfsii and Rhizoctonia solani) expressed varying degrees of antagonistic responses, in-vitro antagonism being more effective against R. solani than S. rolfsii. The production of metabolites in all the Trichoderma isolates did not correlate with enhanced growth on cucumber, bottle gourd and bitter gourd, and bio control efficacy. However, one of the Trichoderma viride isolate (T14) was identified as highest producer of inorganic phosphate, IAA and siderophore exhibited high antagonistic and plant growth promoting ability. A characteristic aromatic odour resembling coconut in T14 isolate was observed which we speculate is due to 6-Pentyl pyrone (one of the best studied secondary metabolites having both antifungal and plant growth-promoting activities).
机译：在当前的研究中，我们评估了从恰蒂斯加尔邦不同地理位置收集的20种木霉菌的潜在促生长代谢产物（IAA，磷酸盐，铁载体）的产生，并评估了它们对黄瓜，葫芦和苦瓜的生长响应。所有木霉分离物都能从磷酸三钙中释放出无机磷，并具有产生铁载体和吲哚-3-乙酸（IAA）的稳定能力。这些代谢物的产生在物种内差异很大。使用同一套分离物，我们评估了潜在的细胞壁降解酶的产生。木霉菌分离物对两种土壤传播的植物病原体（Scelrotium rolfsii和Rhizoctonia solani）的对抗测定表达了不同程度的拮抗作用，体外拮抗作用比S. rolfsii对sol。R. solani更有效。所有木霉菌株中代谢产物的产生与黄瓜，葫芦和苦瓜的生长增强以及生物防治功效均不相关。然而，一种木霉木霉分离物（T14）被认为是无机磷酸盐的最高生产者，IAA和铁载体显示出高的拮抗和促进植物生长的能力。我们推测在T14分离物中观察到一种类似椰子的典型芳香气味，我们推测这是由于6-戊基吡喃酮（研究最深入的次生代谢产物之一，具有抗真菌和促进植物生长的活性）。

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