Response of 15 different warm season turfgrass germplasms to long-term submergence and waterlogging stress

The response of 15 warmseason turfgrass germplasm to longterm submergence stress or waterlogging stress was studied. The results showed that the waterlogging stress promoted the growth of Paspalum distichum P018and P019, Pa. vaginatum P021 and Pseudoraphis spinescens PX02, but significantly inhibited the growth of species such as Cynodon dactylonC. transadlensis C807 and C. dactylon C134. Based on the comprehensive analysis of the 15 germplasms, the ability of waterlogging tolerance was Pa. distichum P018Pa. distichum P019Pa. vaginatum P021Ps. spinescens PX02Pa. distichum P020Eremochloa ophiuroides E194C. dactylon C. transadlensis C751C. dactylon C291Pa. vaginatum P006C. dactylon C106E. ophiuroides E193C. dactylon C. transadlensis C807=C. dactylon C852C. dactylon C851C. dactylon C134. The 15 turfgrasses suffered significantly injury under submergence situation than those living in waterlogging situation, especially for two E. ophiuroides cultivars which cannot survive. Submergence tolerance decreased in the following order according to the analysis of subordinate function: Pa. distichum P018 Pa. distichum P019 Ps. spinescens PX02 Pa. distichum P020C. dactylon C291 C. dactylon C. transadlensis C751 C. dactylon C. transadlensis C807Pa. vaginatum P006 C. dactylon C852 C. dactylon C851 Pa. vaginatum P021 C. dactylon C106 C. dactylon C134 E. ophiuroides E194 =E. ophiuroides E193. Among all these 15 warm-season turfgrasses, Pa. distichum P018, Pa. distichum P019 and Ps. spinescens PX02 had strong resistance to both waterlogging stress and submergence stress which were suggested for vegetation reconstruction in natural riparian zone. Key words: warm season turfgrass; submergence stress; waterlogging stress