A heritable symbiont and host-associated factors shape fungal endophyte communities across spatial scales
A heritable symbiont and host-associated factors shape fungal endophyte communities across spatial scales
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DOI：
10.1111/1365-2745.12967
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发表时间：
2018-11-01
影响因子：
5.5
通讯作者：
Forister, Matthew L.
中科院分区：
文献类型：
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作者：
Harrison, Joshua G.;Parchman, Thomas L.;Forister, Matthew L.
1.微生物生态学家对控制微生物群落组装的过程非常感兴趣;然而，由于缺乏跨越多个地理尺度和生物组织水平的研究，进展受到限制。我们使用高通量测序来表征叶内生真菌群落和宿主植物的遗传结构，在24个种群内和种群之间的斑点疯草紫云英整个大盆地。在整个大盆地，在宿主植物的种群内和种群之间，真菌内生菌的丰富度是通过植物的大小和种子传播的可遗传真菌，链格孢菌fulva，产生生物活性生物碱苦马豆素的变化来预测的。内生菌群落的株间周转程度与寄主植物的近亲繁殖和平均植株大小呈负相关，与A.富尔瓦。植物大小呈负相关的内生菌群落丰富度，种群之间和内。寄主种群间的遗传距离和物理距离不能预测真菌群落结构的差异.合成.通过配对密集的本地和区域采样，我们发现了一个遗传共生体对疯草内生菌群落结构的决定性力量的首要地位。
1. Microbial ecologists are intensely interested in the processes governing microbial community assembly; however, progress has been limited by a lack of studies that span multiple geographical scales and levels of biological organization.2. We used high throughput sequencing to characterize foliar fungal endophyte communities and host plant genetic structure both within and among 24 populations of spotted locoweed Astragalus lentiginosus across the Great Basin Desert.3. Across the Great Basin, both within and among populations of the host plant, fungal endophyte richness was predicted by plant size and variation in the seed-borne, heritable fungus, Alternaria fulva, which produces the bioactive alkaloid swainsonine.4. The degree of between-plant turnover in the endophyte community was inversely related to host plant inbreeding and average plant size and positively related to the relative abundance of A. fulva. Plant size was inversely related to endophyte community richness, both among and within populations. The genetic and physical distance between host populations was not predictive of differences in fungal community structure.5. Synthesis. Through pairing intensive local and regional sampling, we uncovered a primacy of deterministic forces imposed by a heritable symbiont on the community structure of locoweed endophytes.