1. Davidia involucrate genetic diversity of 5 populations in distribution regions was analyzed by RAPD marker.

2. Davidia involucrate Baill is an endangered endemic single species genus plant and has been listed as first degree national protective plant .

3. Objective objective To investigate the anti-inflammatory and analgesic effect of TibetanSaussurea Involucrate.

4. Objective: To establish a system of cell suspension culture for Saussurea involucrate .

5. Objective: To establish a protocol of rapid clonal propagation of Saussurea involucrate by using embryo as explants.

6. Cell growth and flavonoids production in the suspention of S. involucrate culture cell should be optimized.