Mycorrhizal fungi mediate the direction and strength of plant-soil feedbacks differently between arbuscular mycorrhizal and ectomycorrhizal communities
Mycorrhizal fungi mediate the direction and strength of plant-soil feedbacks differently between arbuscular mycorrhizal and ectomycorrhizal communities
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DOI：
10.1038/s42003-018-0201-9
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发表时间：
2018-01-01
影响因子：
5.9
通讯作者：
Toju, Hirokazu
中科院分区：
文献类型：
--
作者：
Kadowaki, Kohmei;Yamamoto, Satoshi;Toju, Hirokazu
植物影响其土壤环境，从而影响下一代可以建立的苗木。虽然研究表明，这种植物-土壤反馈发生在菌根真菌存在的情况下，但仍不清楚菌根真菌何时以及如何在树木群落中调节反馈的方向和强度。在这里，我们表明，丛枝菌根和外生菌根真菌行会以不同的方式调节植物-土壤反馈，以影响树种共存和演替等大规模格局。同一菌根型林下苗木生长时，丛枝菌根植物表现为负反馈或中性反馈，外生菌根植物表现为中性或正反馈。相反，当幼苗生长在同一菌根类型与不同菌根类型之间的联合生长时，正反馈和中性反馈占主导地位。因此，外生菌根群落比丛枝菌根群落表现出更多的积极反馈，这可能解释了为什么大多数温带森林是外生菌根。
Plants influence their soil environment, which affects the next generation of seedlings that can be established. While research has shown that such plant-soil feedbacks occur in the presence of mycorrhizal fungi, it remains unclear when and how mycorrhizal fungi mediate the direction and strength of feedbacks in tree communities. Here we show that arbuscular mycorrhizal and ectomycorrhizal fungal guilds mediate plant-soil feedbacks differently to influence large-scale patterns such as tree species coexistence and succession. When seedlings are grown under the same mycorrhizal type forest, arbuscular mycorrhizal plant species exhibit negative or neutral feedbacks and ectomycorrhizal plant species do neutral or positive feedbacks. In contrast, positive and neutral feedbacks dominate when seedlings are grown in associations within the same versus different mycorrhizal types. Thus, ectomycorrhizal communities show more positive feedbacks than arbuscular mycorrhizal communities, potentially explaining why most temperate forests are ectomycorrhizal.