To test the drought resistance of eight provenances(PRs) of Chinese pine(Panus tabulaef ormas Carr.)

a soil water treatment experiment with water gradients(T1:w ater content was 25%-29%

T2:19%-22 %

and T3:12%-15%)for 120 potted 3-year-old seedlings was conducted. Some physiological and biochemical indexes such as net photosynthetic rate(Pn)

transpiration rate(Tr)

superoxide dismutase (SOD)

activity

and peroxidase(POD) activity were measured and analyzed. Results showed that no significant difference was observed in Pn，among the provenances ander T3>0.05). How ever

PRz had significantly higher Tr than PR1，PR3

and PR5 and PRs5 had significantly higher water use efficiency(WUE) than PR2

PR3，PR4

PR6，PR7

and PR8(P<0.05) under T2.In comparison with those under T2

the SOD activity of all provenances and the POD activity of most provenances reached a higher level under T3.PR7 and PR8 had weaker membrane lipid peroxidation and PR1

PR3

PR4

and PR5 had stronger membrane lipid perm oxidation. In terms of the drought resistance of the provenances

the treatments had the following order of PR8> PR6> PR1>PR5> PR 4>PR3≅PR7>PR2.