Abstract:

In order to study submergence-resistant ability of seedlings of Schima wallichii, Rhodoleia championii and Cinnamomum camphora and provide reference for selection of submergence-resistant tree species, contents of chlorophyll and other physiological indices were determined under submerged stress environment and then principal component analysis was used. The results showed that with increasing submergence time, the chlorophyll content of S. wallichii seedlings fluctuated, that of R. championii and C. camphora slightly increased followed by a decrease; the content of soluble sugar of the three seedlings tended to increase; the content of soluble protein of S. wallichii and C. camphora changed fluctuantly, whereas that of R. championii decreased followed by a increase and then decreased; the activity of SOD of S. wallichii tended to decrease gradually, whereas that of R. championii and C. camphora significantly increased and then decreased; the content of MDA of the three seedlings significantly increased and then gradually decreased. The three seedlings showed a certain submergence-resistant ability during the submergence period of 28 days, and principal component analysis indicated that the order of submerging resistance was C. camphora >S. wallichii> R. championii.