Abstract:

The plasma membrane (PM) permeability increased in white clover roots under PEG-6000 osmotic stress, and the amplitude of changes in drought-resistant cultivar was more sensitive than that in the drought one. the contents of K+, Ca2+ and H+ in root exudates changed with the plasma membrane permeability. PM H+-ATPase activity increased at early stage under stress, but dropped at late stage under serious stress in drought-resistant cultivar. PM Ca2+-ATPase activity changed like PM H+-ATPase activity.