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首页> 外文OA文献 >Transcriptional reprogramming underpins enhanced plant growth promotion by the biocontrol fungus Trichoderma hamatum GD12 during antagonistic interactions with Sclerotinia sclerotiorum in soil.
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Transcriptional reprogramming underpins enhanced plant growth promotion by the biocontrol fungus Trichoderma hamatum GD12 during antagonistic interactions with Sclerotinia sclerotiorum in soil.

机译：在土壤中与菌核盘菌的拮抗相互作用过程中，转录重编程增强了生防真菌木霉木霉GD12促进植物生长的促进作用。

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摘要

The free-living soil fungus Trichoderma hamatum strain GD12 is notable amongst Trichoderma strains in both controlling plant diseases and in stimulating plant growth, a property enhanced during its antagonistic interactions with pathogens in soil. These attributes, alongside its markedly expanded genome and proteome compared to other biocontrol and plant growth promoting Trichoderma strains, imply a rich potential for sustainable alternatives to synthetic pesticides and fertilisers for controlling plant disease and increasing yields. The purpose of this study was to investigate the transcriptional responses of GD12 underpinning its biocontrol and plant growth promotion capabilities during antagonistic interactions with the pathogen Sclerotinia sclerotiorum in soil. Using an extensive mRNA-seq study capturing different time points during the pathogen-antagonist interaction in soil, we show that dynamic and biphasic signatures in the GD12 transcriptome underpin its biocontrol and plant (lettuce) growth promotional activities. Functional predictions of differentially expressed genes demonstrate the enrichment of transcripts encoding proteins involved in transportation and oxidation-reduction reactions during both processes and an over-representation of siderophores. We identify a biphasic response during biocontrol characterised by a significant induction of transcripts encoding small-secreted cysteine rich proteins, secondary metabolite producing gene clusters and genes unique to GD12. These data support the hypothesis that Sclerotinia biocontrol is mediated by the synthesis and secretion of antifungal compounds and that GD12's unique reservoir of uncharacterised genes is actively recruited during effective biological control of a plurivorous plant pathogen. This article is protected by copyright. All rights reserved.
机译：在木霉菌株中，自由活动的土壤真菌木霉木霉GD12在控制植物病害和刺激植物生长方面均很引人注目，该特性在与土壤中病原体的拮抗相互作用中得到增强。与其他生物控制和促进植物生长的木霉菌菌株相比，这些特性以及其显着扩展的基因组和蛋白质组，暗示了可持续的合成农药和肥料替代品的巨大潜力，以控制植物病害和增加产量。这项研究的目的是调查与病原菌核盘菌在土壤中的拮抗作用期间，GD12的转录反应，其支持其生物防治和植物生长促进能力。使用广泛的mRNA-seq研究在土壤中病原体-拮抗剂相互作用期间捕获不同的时间点，我们显示GD12转录组中的动态和双相签名是其生物防治和植物（生菜）生长促进活动的基础。差异表达基因的功能预测表明，在两个过程以及铁载体的过度表达过程中，编码参与转运和氧化还原反应的蛋白质的转录物均富集。我们在生物控制过程中发现特征为显着诱导编码小分泌富含半胱氨酸的蛋白质，次级代谢产物产生基因簇和G​​D12独特基因的转录物的显着诱导，识别出两相反应。这些数据支持以下假设：菌核菌的生物防治作用是由抗真菌化合物的合成和分泌介导的，而在对多食性植物病原体进行有效的生物防治过程中，GD12独特的未鉴定基因的贮藏库被积极招募。本文受版权保护。版权所有。

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