不同耐寒性狗牙根对冻害胁迫的生理响应

Physiological response to freezing temperature for four Bermuda grass was studied with pot method. The results showed that during the freezing stress of Bermudagrass rhizomes, electrical conductivity (EC) showed increasing tendency, proline (Pro) content was appeared trends of first decreasing, and then increasing, Malondialdephyde content (MAD), superoxide dismutasethe (SOD) activity and peroxidase (POD) activity showed the tendency firstly decreasing then increasing and last decreasing, and SOD activity simultaneously Changed with POD. Compared with cold-sensitive materials of Cd128 and Cd147, Cd039 and Cd093 with high Cold-resistance showed the tendency that EC increased slowly and MAD was low, Pro was increased quickly, SOD activity were relatively high, and POD activity appeared unstable.