Epichloë endophytes are a unique model system for the study of the linkages between organisms above and belowground in ecosystems. However, the impact of Epichloë gansuensis in Achnatherum inebrians on soil enzymes activity and soil nutrients remains poorly understood. Achnatherum inebrians with (E+) and without E. gansuensis (E−) were established in different plots of an experimental field in 2011. At 2016, the activity of soil invertase, soil urease, soil alkaline phosphatase and the soil nutrient of E+ and E− plots was determined in the A. inebrians growth and senescent stages; further, we used NMDS to evaluate the roles of endophyte and growth phase for each sample with soil properties. The interaction of E. gansuensis-infection and growth phase significantly influences TN and AN. E. gansuensis enhanced the activity of soil invertase and soil alkaline phosphatase in growth and senescence stages of A. inebrians, E. gansuensis increased the activity of urease in the growth stage. E. gansuensis significantly increased the content of soil TN and AN in the A. inebrians growth stage. The results of NMDS showed that E. gansuensis and growth phase significantly influenced the soil properties, respectively. Therefore, E. gansuensis played an important role in improving soil enzymes activity and soil nutrients content. E. gansuensis improve soil fertility through regulating soil enzymes activity and soil nutrients. This study provided insights into a poorly understood ecosystem function of Epichloë and enhanced knowledge of the benefits provided by these mutualistic fungal endophytes of many grass species.

中文翻译：

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Epichloë gansuensis 内生菌感染改变蜈蚣不同生长阶段的土壤酶活性和土壤养分

Epichloë 内生菌是一种独特的模型系统，用于研究生态系统中地上和地下生物之间的联系。然而，Epichloë gansuensis 在 Achnatherum inebrians 中对土壤酶活性和土壤养分的影响仍然知之甚少。2011年在试验田不同地块分别建立了含(E+)和不含甘肃针叶螟(E-)的茼蒿。2016年土壤转化酶、土壤脲酶、土壤碱性磷酸酶活性及E+和E的土壤养分- 在 A. inebrians 生长和衰老阶段确定地块；此外，我们使用 NMDS 来评估具有土壤特性的每个样品的内生菌和生长期的作用。E. gansuensis-感染和生长期的相互作用显着影响TN和AN。E. gansuensis在A.inebrians的生长和衰老阶段提高了土壤转化酶和土壤碱性磷酸酶的活性，E.gansuensis在生长阶段提高了尿素酶的活性。E. gansuensis 在 A.inebrians 生长阶段显着增加了土壤 TN 和 AN 的含量。NMDS结果表明甘肃E. gansuensis和生长期分别显着影响土壤性质。因此，甘肃E. gansuensis在提高土壤酶活性和土壤养分含量方面发挥了重要作用。E. gansuensis 通过调节土壤酶活性和土壤养分来提高土壤肥力。这项研究提供了对 Epichloë 鲜为人知的生态系统功能的见解，并增强了对许多草种的这些共生真菌内生菌所提供的益处的认识。