PHYSIOLOGICAL RESPONSE AND RECOVERY OF Zoysia japonica Steud. (Family: Poaceae) TO DROUGHT STRESS...

The goal of this study was to learn more about the effects of mild, moderate, and severe drought stress on zoysia grass and how it recovered (Zoysia japonica). Drought conditions of mild (60 percent to 70% of field capacity), moderate (45 percent to 55 percent of field capacity), and severe (25 percent to 35 percent of field capacity) were maintained for 16 days. After 2 to 6 days of re-watering, recovery was determined. In comparison to the control treatments, all treatments had lower aboveground and belowground fresh and dry weights at the end of the trial. From days 5 to 16, leaf chlorophyll concentration was significantly reduced in three treatments compared to controls, with the severe drought stress treatments having the biggest impact. Plants exposed to moderate or severe drought treatments had significantly lower net photosynthetic rates than control plants. SOD activity increased after 7 to 13 days in plants exposed to mild and moderate drought, but decreased after 1 to 10 days in plants exposed to severe drought. POD and CAT activity rose in all treatments, with the extreme drought stress treatments having the highest effect. MDA levels were greater in plants exposed to moderate or severe drought for 4 to 13 days than in control plants. At 7 to 13 days, leaf proline concentrations increased significantly in all treatments. Even in plants exposed to extreme drought, chlorophyll concentration, POD and CAT activities, MDA and proline concentration in leaves returned to normal following recovery. These findings imply that zoysia grass is drought tolerant to a high degree.

Please see the link :- https://www.ikprress.org/index.php/JOGAE/article/view/2469