Effect of NaCI stress on permeability of plasma membrane and substance transformation in germinated rice seeds

Under NaC1 stress，the relative permeability of plasma membrane and the leakages of K⁺ and Na⁺ increased，the a^-amylase activity declined rapidly，the hydrolysis rate of starch and the content of soluble sugars decreased，the starch grains in the storage tissue of starch was densified．At the same time，the protease activity and the transformation rate of proteins decreased，the residual proteins in the aleurone layer increased and the consumption of dry matters decreased，the hydrolase was inhibited and its extent was lower in salt-tolerant cultivar than in salt-sensitive one．The transformation rate of storage matters was higher in salt-tolerant cultivar than in salt-sensitive one．