夏季水淹处理对疏花水柏枝恢复生长过程非结构性碳水化合物代谢的作用OA

The endangered plant Myricaria laxiflora experiences prolonged flooding every summer.To reveal the effect of summer flooding on its recovery growth,different combinations of flooding durations(10,50,and 90 days)and flooding depths(root flooding,half flooding,and full flooding)were set up.The changes in non-structural carbohydrate(NSC)content and the activities of related metabolic enzymes during the recovery growth of M.laxiflora were measured.The results showed that summer flooding significantly increased the NSC content and its components at the early stage of recovery growth,but the treatment effect gradually decreased with the progress of recovery growth.Flooding also significantly increased the activities of neutral invertase,acid invertase,fructose-1,6-bisphosphate aldolase,and fructose-1,6-bisphosphate phosphotransferase related to NSC metabolism throughout the recovery growth period,while significantly reducing the activity of sucrose phosphate synthase.Correlation analysis indicated that the changes in NSC content and its components were significantly correlated with the activities of related metabolic enzymes to varying degrees.Further principal component analysis showed that summer flooding induced the differentiation of NSC metabolism during the recovery growth period.Flooding promoted the differentiation of NSC metabolism towards high soluble sugar content at the early stage of recovery growth,while the NSC metabolism of the control group(without flooding)differentiated towards low soluble sugar content.Therefore,summer flooding can enhance the NSC metabolism physiology at the early stage of recovery growth and promote the recovery growth of the plant.