Physiological response of Bermudagrass（Cynodon dactylon）to different drought stresses

A pot experiment was carried out determine the physiological response of Bermudagrass （Cynodon dactylon）to different drought stresses for selecting the appropriate time of irrigation by measuring the relative water content, content of free proline and superoxidase activity. The results of this study indicated that drought stress decreased leaf relative water content and increased the content of free proline. The reirrigation in the 12 days after drought stress restored the relative leaf water content and free proline. The reirrigation in the 8 days after drought stress restored the superoxidase activity. This study suggested that Bermudagrass cultivated in soilless medium could tolerate 12 days drought stress, but reirrigation in 8 days after drought stress was the best time for Bermudagrass recovery growth.