Seed Germination of Lagerstroemia indica under Drought Stress Simulated by PEG

[Objective]The aim was to explore the drought resistance of L. indica seeds.[Method]The seed germination and seedling growth of L. indica were discussed through simulating the solution drought stress conditions with different PEG-6000 concentrations(0,5%,6%,7% and 9%). [Result]With the increasing of PEG(5%- 7%)concentrations,the germination percentage,germinat index,seed vigor index,seedling epicotyl were all decreased gradually,the number of lateral root and seedling hypocotyl were promoted,and the above indexes were all significantly declined in 9% concentration of the PEG-6000. [Conclusion]L. indica seed could tolerant the osmotic stress of 5%-7% PEG treatment,and seedling tolerate appropriate drought by reducing the growth of above ground part while maintaining a high percentage of root mass under lab condition.