Relationship between change of polyamine contents and drought-resistance in rice seedlings under water stress

Indica rice cultivars of Han116 and Xiangzaoxian32 were used as experimental materials with different concentration (0%,5%,10%,15%,20%,25%)PEG6000,the relationship between change of polyamine contents and drought-resistance in rice seedlings under water stress was investigated. The results showed the contents of Put,Spd and Spm significantly increased under water stress,Han116 increased more markedly than Xiangzaoxian32,which was a positive correlation between Put,Spd and Spm contents and root/shoot. Through regression analysis,Put,Spd and Spm were respectively led into by y1=1.248E-04x1+0.272,y1=1.421E-05x2+0.240,y2=-1.55E-05x2+4.922E-04x3+0.126,y2=4.679E-04x3+3.923E-02 equations(x1,x2,x3 respectively mean Put,Spd and Spm ,y1 ,y2 respectively mean shoot and root dry weight ).