Arbuscular mycorrhizal fungi promote coexistence and niche divergence of sympatric palm species on a remote oceanic island.
Arbuscular mycorrhizal fungi promote coexistence and niche divergence of sympatric palm species on a remote oceanic island.
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DOI：
10.1111/nph.14850
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发表时间：
2018-03
期刊：
影响因子：
--
通讯作者：
Savolainen V
中科院分区：
文献类型：
--
作者：
Osborne OG;De-Kayne R;Bidartondo MI;Hutton I;Baker WJ;Turnbull CGN;Savolainen V
微生物可以对其宿主产生深远的影响，推动自然选择，促进物种形成并决定物种分布。然而，很少研究土壤微生物作为植物进化变化的驱动因素。我们使用元条形码和土壤微生物组的实验操作来研究土壤和根系微生物对一个众所周知的同域物种形成的影响，即澳大利亚豪勋爵岛的豪亚棕榈树。森林杉既可以在钙质土壤上生长，也可以在火山土壤上生长，而白僵杉则只能在火山土壤上生长，但在火山土壤上生长得更好，这表明对这两种土壤类型的适应存在权衡。我们对这种权衡提出了一种新的解释。相对于火山土和钙质土，火山土上的森林杉的丛枝菌根真菌（AMF）明显减少。生存实验的结果也反映了这一点，自然土壤的灭菌降低了除了火山土壤上的森林杉外所有土壤-物种组合的howa适合度。此外，AMF相关基因显示出Howea物种之间不同选择的证据。这些结果表明了一种机制，通过这种机制，分化适应可以对宿主-微生物相互作用产生连锁效应，从而减少种间竞争，促进植物姐妹物种的共存。参见Geml & Wagner对这篇文章的评论，217:965-967。
Microbes can have profound effects on their hosts, driving natural selection, promoting speciation and determining species distributions. However, soil‐dwelling microbes are rarely investigated as drivers of evolutionary change in plants. We used metabarcoding and experimental manipulation of soil microbiomes to investigate the impact of soil and root microbes in a well‐known case of sympatric speciation, the Howea palms of Lord Howe Island (Australia). Whereas H. forsteriana can grow on both calcareous and volcanic soils, H. belmoreana is restricted to, but more successful on, volcanic soil, indicating a trade‐off in adaptation to the two soil types. We suggest a novel explanation for this trade‐off. Arbuscular mycorrhizal fungi (AMF) are significantly depleted in H. forsteriana on volcanic soil, relative to both H. belmoreana on volcanic soil and H. forsteriana on calcareous soil. This is mirrored by the results of survival experiments, where the sterilization of natural soil reduces Howea fitness in every soil–species combination except H. forsteriana on volcanic soil. Furthermore, AMF‐associated genes exhibit evidence of divergent selection between Howea species. These results show a mechanism by which divergent adaptation can have knock‐on effects on host–microbe interactions, thereby reducing interspecific competition and promoting the coexistence of plant sister species. See also the Commentary on this article by Geml & Wagner, 217: 965–967.
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影响因子：
2.1
作者：
Dunning LT;Hipperson H;Baker WJ;Butlin RK;Devaux C;Hutton I;Igea J;Papadopulos AS;Quan X;Smadja CM;Turnbull CG;Savolainen V
通讯作者：
Savolainen V
影响因子：
4.3
作者：
Gaur, A;Gaur, A;Adholeya, A
通讯作者：
Adholeya, A
同胞棕榈中的生态形成：2。前后结肠分离。
影响因子：
2.1
作者：
Hipperson H;Dunning LT;Baker WJ;Butlin RK;Hutton I;Papadopulos AS;Smadja CM;Wilson TC;Devaux C;Savolainen V
通讯作者：
Savolainen V
影响因子：
64.8
作者：
Barluenga, M;Stölting, KN;Meyer, A
通讯作者：
Meyer, A
影响因子：
3
作者：
Curtis, JT
通讯作者：
Curtis, JT