Specialized Microbiome of a Halophyte and its Role in Helping Non-Host Plants to Withstand Salinity.
Specialized Microbiome of a Halophyte and its Role in Helping Non-Host Plants to Withstand Salinity.
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盐生植物的特殊微生物组及其在帮助非寄主植物抵御盐度方面的作用
DOI：
10.1038/srep32467
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发表时间：
2016-08-30
影响因子：
4.6
通讯作者：
Lin F
中科院分区：
文献类型：
--
作者：
Yuan Z;Druzhinina IS;Labbé J;Redman R;Qin Y;Rodriguez R;Zhang C;Tuskan GA;Lin F
根系微生物区系是植物生产力和胁迫耐受性的关键决定因素。在这里，我们假设，上级耐盐性seepweedSuaeda salsais紧密相连的一个专门的地下微生物。为了验证这一假设，我们进行了基于细菌16 S rRNA基因和真菌核rRNA内转录间隔区分析的系统发育特征为基础的框架分析。结果表明，根际和非根际土壤中α-变形菌和γ-变形菌的优势菌群在系统发育上呈现出过度分散的趋势，但在系统发育上呈现出明显的聚集性。同样，优势真菌属发生在高系统发育冗余。有趣的是，我们发现根际和内生细菌基因组与S。salsato富含有助于盐胁迫适应、营养溶解和竞争性根定殖的基因。广泛多样的根际细菌与已知的耐盐类群的相似性进一步支持了这一解释。这些结果表明，盐地碱蓬系统已经采取了一种生态模式化的根-微生物相互作用策略来应对土壤盐分。我们还证明了潜在的核心微生物组成员改善了非宿主植物的生长和耐盐性。这项工作提供了一个平台，以提高植物与盐生植物微生物联营体的健身和新的见解植物微生物组在盐度下的功能。
Root microbiota is a crucial determinant of plant productivity and stress tolerance. Here, we hypothesize that the superior halo-tolerance of seepweedSuaeda salsais tightly linked to a specialized belowground microbiome. To test this hypothesis, we performed a phylogenetic trait-based framework analysis based on bacterial 16S rRNA gene and fungal nuclear rRNA internal transcribed spacer profiling. Data showed that the dominant α-proteobacteria and γ-proteobacteria communities in bulk soil and root endosphere tend to be phylogenetically clustered and at the same time exhibit phylogenetic over-dispersion in rhizosphere. Likewise, the dominant fungal genera occurred at high phylogenetic redundancy. Interestingly, we found the genomes of rhizospheric and endophytic bacteria associated withS. salsato be enriched in genes contributing to salt stress acclimatization, nutrient solubilization and competitive root colonization. A wide diversity of rhizobacteria with similarity to known halotolerant taxa further supported this interpretation. These findings suggest that an ecological patterned root-microbial interaction strategy has been adopted inS. salsasystem to confront soil salinity. We also demonstrated that the potential core microbiome members improve non-host plants growth and salt tolerance. This work provides a platform to improve plant fitness with halophytes-microbial associates and novel insights into the functions of plant microbiome under salinity.
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影响因子：
4.4
作者：
Eastman AW;Heinrichs DE;Yuan ZC
通讯作者：
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影响因子：
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作者：
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通讯作者：
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作者：
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作者：
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通讯作者：
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影响因子：
5.2
作者：
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通讯作者：
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