Endophytes of grasses have been reported to affect the colonization by arbuscular mycorrhizal fungi (AMF) not only of their dual host plant but also of neighboring non-endophyte-infected plants. However, studies investigating the impact of AMF identity on the effects of endophyte-infected grasses on neighboring plants are rare. In this study, we investigated the influence of Leymus chinensis litter type (NL, no litter; E-, endophyte-free litter; E-E+, half E+ and half E- litter; E+, endophyte-infected litter) on Stipa krylovii growth with different AMF species (Claroideoglomus etunicatum, CE; Funneliformis mosseae, FM; Claroideoglomus claroideum, CC; Rhizophagus intraradices, RI). The results showed that the root biomass of S. krylovii tended to decrease with the increase of E+ litter in the mycorrhiza-free treatment. With AMF inoculation, the effects of E+ litter on the AMF colonization rate and root biomass of S. krylovii varied with AMF species. Structural equation modeling (SEM) showed E+ litter could modulate the growth of S. krylovii indirectly via changes in AMF colonization rate, but this effect was related to AMF species.

中文翻译：

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丛枝菌根真菌的特性调节内生植物感染草对邻近植物的生长作用。

据报道，草的内生植物不仅影响其双寄主植物而且还影响邻近的未被内生细菌感染的植物的丛枝菌根真菌（AMF）定居。但是，很少有研究调查AMF身份对内生植物感染的草对邻近植物的影响的研究。在这项研究中，我们调查了羊草凋落物类型（NL，无凋落物； E-，无内生真菌的凋落物； E-E +，一半E +和一半E-凋落物； E +，被内生细菌感染的凋落物）对Stypa krylovii生长的影响。具有不同的AMF种类（Claroideoglomus etunicatum，CE; Funneliformis mosseae，FM; Claroideoglomus claroideum，CC;根瘤菌，RI）。结果表明，在无菌根处理中，克氏链球菌根系生物量随E +凋落物的增加而减少。与AMF接种，E +垫料上的AMF侵染率和根生物量的影响克氏针茅与AMF物种变化。结构方程模型（SEM）表明，E +凋落物可以通过AMF定殖率的变化间接调节克氏链球菌的生长，但这与AMF种类有关。