Spatial heterogeneity in genetic diversity and composition of bacterial symbionts in a single host species population
Spatial heterogeneity in genetic diversity and composition of bacterial symbionts in a single host species population
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单一宿主物种群体中细菌共生体遗传多样性和组成的空间异质性
DOI：
10.1007/s11104-020-04583-4
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发表时间：
2020
期刊：
影响因子：
4.9
通讯作者：
Utsumi Shunsuke
中科院分区：
文献类型：
--
作者：
Kagiya Shinnosuke;Utsumi Shunsuke
目的揭示田间条件下根瘤共生的遗传多样性对于理解与宿主相关的生物生态群落的形成和自然生态系统中的氮循环至关重要。然而，由于共生细菌的遗传多样性受到宿主的限制，我们对局部范围内的细菌共生菌的遗传多样性了解仍然很少。方法我们对当地林分中的弗兰克兰的遗传多样性进行了深入的调查。我们从覆盖连续种群空间范围的213株赤杨幼苗中采集了根瘤，这意味着赤杨个体在连续森林中的分布相对均匀。然后，对 thenifD-K IGS 区域进行系统发育和多样性分析，包括来自 Alnushosts 的全局 Frankia 序列。结果 即使在局部范围内也检测到了 Frankia 的遗传多样性，测量结果与先前在局部和区域范围内进行的研究所显示的一样高。此外，遗传结构分析显示，尽管空间尺度很小，但弗兰基亚的遗传变异呈马赛克式空间分布。结论细菌共生体的遗传多样性和组成在局部尺度上是异质的。我们的研究结果表明，遗传上不同的细菌共生体同时与单一宿主群体相互作用，并且相互作用伙伴关系在空间上有所不同。持续变化可以在异质森林生态系统中产生动态的生态和进化结果。
AimsRevealing genetic diversity in a root nodulation symbiosis under field conditions is critical to understand the formation of ecological communities of organisms associated with hosts and the nitrogen cycle in natural ecosystems. However, our knowledge of the genetic diversity of bacterial mutualists on a local scale is still poor because of the assumption that the genetic diversity of mutualistic bacteria is constrained by their hosts.MethodsWe thoroughly investigated the genetic diversity ofFrankiain a local forest stand. We collected root nodules from 213Alnus hirsutaseedlings covering the spatial range of the continuous population, which means thatAlnusindividuals occurred in a relatively homogeneous distribution in a continuous forest. Then, a phylogenetic and diversity analysis was performed for thenifD-K IGS region, including globalFrankiasequences fromAlnushosts.ResultsThe genetic diversity ofFrankiadetected even on a local scale measured as high as that shown by previous studies conducted on local and regional scales. Moreover, a genetic structure analysis revealed a spatially mosaic-like distribution of genetic variation inFrankiadespite the small spatial scale.ConclusionsThe genetic diversity and composition of bacterial mutualists are heterogeneous on a local scale. Our findings demonstrate that genetically different bacterial symbionts simultaneously interact with a single host population and interaction partnerships spatially vary. The standing variation could produce dynamic ecological and evolutionary outcomes in a heterogeneous forest ecosystem.
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影响因子：
3.3
作者：
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作者：
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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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