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首页> 外文期刊>Molecular Plant-Microbe Interactions >Trichoderma spp. Improve Growth of Arabidopsis Seedlings Under Salt Stress Through Enhanced Root Development, Osmolite Production, and Na+ Elimination Through Root Exudates
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Trichoderma spp. Improve Growth of Arabidopsis Seedlings Under Salt Stress Through Enhanced Root Development, Osmolite Production, and Na+ Elimination Through Root Exudates

机译：木霉属。通过增强根系发育，渗透压生产和根系分泌物消除Na +来改善盐胁迫下拟南芥幼苗的生长

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摘要

Salt stress is an important constraint to world agriculture. Here, we report on the potential of Trichoderma virens and T atroviride to induce tolerance to salt in Arabidopsis seedlings. We first characterized the effect of several salt concentrations on shoot biomass production and root architecture of Arabidopsis seedlings. We found that salt repressed plant growth and root development in a dose-dependent manner by blocking auxin signaling. Analysis of the wild type and eir1, aux1-7, arf7arf19, and tir1abf2abf19 auxin-related mutants revealed a key role for indole-3-acetic acid (IAA) signaling in mediating salt tolerance. We also found that T virens (Tv29.8) and T atroviride (IMI 206040) promoted plant growth in both normal and saline conditions, which was related to the induction of lateral roots and root hairs through auxin signaling. Arabidopsis seedlings grown under saline conditions inoculated with Trichoderma spp. showed increased levels of abscissic acid, L-proline, and ascorbic acid, and enhanced elimination of Na+ through root exudates. Our data show the critical role of auxin signaling and root architecture to salt tolerance in Arabidopsis and suggest that these fungi may enhance the plant IAA level as well as the antioxidant and osmoprotective status of plants under salt stress.
机译：盐胁迫是世界农业的重要制约因素。在这里，我们报道了木霉属和阿托韦德可能诱导拟南芥幼苗对盐的耐受性。我们首先表征了几种盐浓度对拟南芥幼苗的茎生物量生产和根系结构的影响。我们发现盐通过阻断生长素信号传导以剂量依赖的方式抑制了植物的生长和根系发育。对野生型和eir1，aux1-7，arf7arf19和tir1abf2abf19生长素相关突变体的分析揭示了吲哚-3-乙酸（IAA）信号在介导耐盐性中的关键作用。我们还发现，T virens（Tv29.8）和T atroviride（IMI 206040）在正常和盐分条件下均能促进植物生长，这与通过生长素信号传导诱导侧根和根毛有关。接种木霉菌的生理条件下生长的拟南芥幼苗。结果表明，脱落酸，L-脯氨酸和抗坏血酸的含量增加，并且通过根分泌物消除Na +的能力增强。我们的数据显示了生长素信号传导和根系结构对拟南芥耐盐性的关键作用，并表明这些真菌可能会增强植物IAA水平以及盐胁迫下植物的抗氧化和渗透保护状态。

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