Physiological Responses and Tolerance Evaluation of Different Varieties of Carya illinoinensis Seedlings under Water Logging Stress
In order to provide scientific basis for introduction and promotion of five different varieties of Carya illinoinensis in Guangxi, taking two-year-old C. illinoinensis seedlings of Shaoxing, Jinhua, Baker, Caddo and Pawnee varieties as materials, setting semi water logging and full water logging treatments, activities of superox-ide dismutase (SOD), peroxidase (POD), catalase (CAT) and polyphenol oxidase (PPO), and contents of malondi-aldehyde (MDA) and soluble protein (SP) in leaves of seedlings were studied. Tolerances of seedlings were com-prehensively evaluated. Results showed that effects of different varieties, treatment time and treatments and their interactions on activities of SOD, POD, CAT and PPO and contents of MDA and SP were extremely signifi-cant. Different antioxidant enzymes were able to respond to water logging environment at early stage of stress . Contents of MDA in most varieties were higher, and activities of some antioxidant enzymes and contents of SP of some varieties were at higher levels when water logging stress was carried out in middle and late stages . C. illi-noinensis seedlings reduced damages caused by water logging stress by increase contents of SP and activities of antioxidant enzymes. Membership function analysis showed that both Jinhua and Caddo varieties were more tol-erant to water logging in semi water logging and full water logging treatments, while Shaoxing, Pawnee and Bak-er varieties were less tolerant to water logging.
万方数据
维普
