Effects of the Epichloё gansuensis endophyte on the disease resistance of drunken horse grass to powdery mildew Morphological, physiological and phylogenetic characteristics of Epichloё endophyte associated with Dactylis glomerata Effect of the Epichloё endophyte on the soil nematode community in the rhizosphere of Achnatherum inebrians Isolation and identification of endophytes infecting Stipa purpurea, a dominant grass in meadows of the Qinghai-Tibet Plateau Effects of Epichloё endophyte and seed hydro-priming on the germination of Festuca sinensis under NaCl stress