Effects of Endophytic Fungi on Seed Germination and Seedling Physiological Characteristics of Melica transsilvanica under Salt Stress
Melica transsilvanica seeds with fungi (E+) and without fungi (E-) were stressed with different concentrations of NaCl, the seed germination characteristics and seedling physiological indexes were determined.The results showed that: Salt stress inhibited the Melica transsilvanica seed germination and chlorophyll contents, but low concentration of salt (less than 50 mmol/L) had a promoting effect on radical length and chlorophyll contents of M.transsilvanica, which in E+ plants were increased by 8.65%, 2.47%, in E-plants were increased by 7.94%, 0.17%;At the same time, salt stress also affected the seedlings physiological characteristics, in high concentration of salt (more than 200 mmol/L), cell membrane permeability of E+ plants decreased by 12.87% than that of E-plant;MDA decreased by 49.29%;the free proline decreased by 12.26%, salt stress resulted in the damage of cell membrane, the stronger the salt concentration, the greater the damage was, but the endophytic fungi could benefit seed germination and seedling physiological indexes, the damage was significantly reduced.
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