Root microbiota dynamics of perennial Arabis alpina are dependent on soil residence time but independent of flowering time.
Root microbiota dynamics of perennial Arabis alpina are dependent on soil residence time but independent of flowering time.
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DOI：
10.1038/ismej.2016.109
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发表时间：
2017-01
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影响因子：
--
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中科院分区：
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--
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最近对多年生羊茅和一年生拟南芥的田间和实验室实验表明，根部微生物群影响开花时间。在这里，我们在长期的时间进程实验中，通过16S rRNA基因图谱研究了北极高山多年生阿拉比斯高山植物在自然和控制环境中的细菌根微生物区系。我们确定土壤类型和植物在土壤中的停留时间是解释15%的根微生物区系变异的主要决定因素，而环境条件和寄主基因对变异的最大解释是11%。在同一土壤中生长时，多年生高山芦荟的根部微生物区系组成与其一年生近缘高山芦荟和多毛碎米草的基本相似。不开花的野生型高山艾美耳草和开花的PEP1突变植物组装了一个基本上无法区分的根微生物群，从而将开花时间与植物停留时间依赖的微生物群变化分开。这揭示了根部微生物群对高山金针茅开花和永久开花的健壮性。与以前的研究一起，这意味着一个模型，其中部分根微生物区系调节开花时间，而在营养生长过程中获得微生物区系后，建立的根相关细菌组合在结构上对开花和植物身高的剧烈变化造成的扰动具有很强的抵抗力。
Recent field and laboratory experiments with perennial Boechera stricta and annual Arabidopsis thaliana suggest that the root microbiota influences flowering time. Here we examined in long-term time-course experiments the bacterial root microbiota of the arctic-alpine perennial Arabis alpina in natural and controlled environments by 16S rRNA gene profiling. We identified soil type and residence time of plants in soil as major determinants explaining up to 15% of root microbiota variation, whereas environmental conditions and host genotype explain maximally 11% of variation. When grown in the same soil, the root microbiota composition of perennial A. alpina is largely similar to those of its annual relatives A. thaliana and Cardamine hirsuta. Non-flowering wild-type A. alpina and flowering pep1 mutant plants assemble an essentially indistinguishable root microbiota, thereby uncoupling flowering time from plant residence time-dependent microbiota changes. This reveals the robustness of the root microbiota against the onset and perpetual flowering of A. alpina. Together with previous studies, this implies a model in which parts of the root microbiota modulate flowering time, whereas, after microbiota acquisition during vegetative growth, the established root-associated bacterial assemblage is structurally robust to perturbations caused by flowering and drastic changes in plant stature.
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影响因子：
4.4
作者：
Lauber, Christian L.;Hamady, Micah;Fierer, Noah
通讯作者：
Fierer, Noah
影响因子：
64.8
作者：
Bai, Yang;Mueller, Daniel B.;Schulze-Lefert, Paul
通讯作者：
Schulze-Lefert, Paul
影响因子：
3.6
作者：
Chelius, MK;Triplett, EW
通讯作者：
Triplett, EW
DOI：
10.1073/pnas.0909766107
发表时间：
2010-10-26
影响因子：
11.1
作者：
Beilstein, Mark A.;Nagalingum, Nathalie S.;Mathews, Sarah
通讯作者：
Mathews, Sarah
影响因子：
11
作者：
Chaparro, Jacqueline M.;Badri, Dayakar V.;Vivanco, Jorge M.
通讯作者：
Vivanco, Jorge M.