PJB-2017-887
PHYSICOCHEMICAL PROPERTIES OF AN PROPERTIES OF AN ASEXUAL EPICHLOË ENDOPHYTE-MODIFIED WILD BARLEY IN THE PRESENCE OF SALT STRESS
Shuihong chen
Abstract
The endophyte infected (E+) and endophyte free (E–) wild barley (Hordeum brevisubulatum) tillers were grown in a half-strength Hoagland nutrient solution using a hydroponics method. Two weeks later, salt stress treatment was initiated with 200 mM sodium chloride for six days. Then, the relevant physiological indicators were determined. The results showed that the levels of chlorophyll a/b and carotenoids were significantly higher in the plants with endophytic fungi than those in the endophyte free plants. The peroxidase, catalase and superoxide dismutase activities in the endophyte infected plants were significantly higher than those without endophytic fungi. The E+ wild barley plants had higher relative water content than the E– wild barley plants. The content of proline and soluble sugars in E+ wild barley were significantly increased. Under salt stress conditions, the endophyte infection significantly modulated stress by up-regulating the photosynthetic pigments, relative water content, proline, and soluble sugar contents compared to the E– plants. In conclusion, the asexual Epichloë endophyte significantly reprogrammed the physical properties of the host plants of Epichloë bromicola during treatment with 200 mM NaCl.
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