In order to study the effects of salicylic acid on the growth and physiological performance of Ulva prolifera with different proliferative styles,we took U. prolifera from vegetative( VU) and spore proliferative cells( SU) as materials,and cultured them under different salicylic acid concentrations to investigate their growth rate,chlorophyll fluorescence,SOD and soluble protein content.The results showed that the growth of both VU and SU was promoted by low concentration of salicylic acid,especially for VU...