Effects Of Neotyphodium Endophyte On Salt Tolerance To Drunken Horse Grass (Achnatherum Inebrians)

Drunken horse grass (Achnatherum inebrians), an intoxicating grass growing at native grassland at Xiahe and Yuzhong county in Gansu province of China, symbiotic with Neotyphodium endophyte was studied in this paper, maily including salt stress response to seed germination, growth and physiological characteristics of A. inebrians. The results summarized as followings:1. Seed germination experiment showed that compared with endophyte-free (E-) plants, germination rate, germinatioin index, shoot length and root length of endophyte-infected (E+) seeds were increased.2. Seedling experiment showed that better salt tolerance to plant imparted by Neotyphodium was determined. Compared with E- plants in greenhouse, vegetative growth, water protection, membrane permeability and ion distribution of E+ plants were significantly increased.3. Adults experiment showed that better salt tolerance to plant imparted by Neotyphodium were determined. Compared with E- plants, vegetative growth, water protection, menbrance permeability, ion distribution and fluorescence parameters of E+ plants were significantly increased. But there is no significant effect on osmotic adjustment by endophyte.4. The growth condition of drunken horse grass might affect growth, physiological characteristics of endophyte-infected plants.