Removal of Soil Microbes Alters Interspecific Competitiveness of Epichloë Endophyte-Infected over Endophyte-Free Leymus chinensis
Removal of Soil Microbes Alters Interspecific Competitiveness of Epichloë Endophyte-Infected over Endophyte-Free Leymus chinensis
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DOI：
10.3390/microorganisms8020219
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发表时间：
2020-02
期刊：
影响因子：
4.5
通讯作者：
Hui Liu;Jing Chen;Tianzi Qin;Xinjian Shi;Yu-bao Gao;A. Ren
中科院分区：
文献类型：
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作者：
Hui Liu;Jing Chen;Tianzi Qin;Xinjian Shi;Yu-bao Gao;A. Ren
Epichloë内生菌不仅影响寄主植物的生长和抗性，还可能影响包括土壤微生物在内的土壤环境。Epichloë内生菌介导的土壤微生物修饰能否影响宿主草的竞争能力？在这项研究中，我们测试了Epichloë内生菌和土壤微生物是否改变了Epichloë内生菌定殖（EI）和无内生菌（EF）的羊草（Leymus chinensis）的种内竞争以及羊草（L. chinensis和克氏针茅（Stipa krylovii）。结果表明，Epichloë内生菌定殖显著增强了L.这种有益效果不受土壤微生物的影响。然而，在种间竞争下，观察到Epichloë内生菌与土壤微生物之间存在显着的相互作用。随着土壤微生物的去除，Epichloë内生菌对寄主种间竞争的影响由正向中性转变。在这里，较高的菌根定殖率可能有助于种间竞争优势的EI比EF L。chinensis。我们的研究结果表明，Epichloë内生菌可以通过植物土壤反馈影响宿主的竞争能力，从目前的竞争植物物种。
Epichloë endophytes may not only affect the growth and resistances of host grasses, but may also affect soil environment including soil microbes. Can Epichloë endophyte-mediated modification of soil microbes affect the competitive ability of host grasses? In this study, we tested whether Epichloë endophytes and soil microbes alter intraspecific competition between Epichloë endophyte-colonized (EI) and endophyte-free (EF) Leymus chinensis and interspecific competition between L. chinensis and Stipa krylovii. The results demonstrated that Epichloë endophyte colonization significantly enhanced the intraspecific competitive ability of L. chinensis and that this beneficial effect was not affected by soil microbes. Under interspecific competition, however, significant interactions between Epichloë endophytes and soil microbes were observed. The effect of Epichloë endophytes on interspecific competitiveness of the host changed from positive to neutral with soil microbe removal. Here higher mycorrhizal colonization rates probably contributed to interspecific competitive advantages of EI over EF L. chinensis. Our result suggests that Epichloë endophytes can influence the competitive ability of the host through plant soil feedbacks from the currently competing plant species.