Effects of aqueous root extracts on seedling growth and root respiratory metabolisms of Cerasus sachalinensis
Abstract：The effects of aqueous extracts of Cerasus sachalinensis Kom. roots on seedling growth and root respiratary metabolisms were studied. Results showed that the seedling height, stem diameter, root length, new root number, growth of shoot and root, root activity, the PS U maximum photochemical efficiency and respiratory substrate content of C. sachalinensis were all stimulated at low concentration and repressed at high concentration. The respiratory rates, respiratory pathways, respiratory enzyme activities and interme- diate products were not significantly influenced at 100 g·L^-1 concentration and the respiratory metabolism had done successfully. Respiratory rate was notablely increased at 200g·L^-1 concentration. The HK, PK and G-6-PDH activities were induced and MDH expression were depressed. Seedlings were under stress as a result of TCA process choked back and pyruvic acid accumulated. Treatment of 400g·L^-1 concentra- tion checked the respiratory rate greatly by 42.82%, the G-6-PDH and 6-G-PDH activities were signifi- cantly enhanced which regulated PPP running at high level but EMP-TCA suffocated. Contents of pyruvic acid and citric acid declined greatly and the seedling respiratory metabolisms disordered.
Keywords：Cerasus sachalinensis Kom.Aqueous root extractsRespiratory metabolismAutotoxicityAllelopathy
Publication Date：2012-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)