Overexpression of vacuolar proton pump ATPase (V-H+-ATPase) subunits B, C and H confers tolerance to salt and saline-alkali stresses in transgenic alfalfa (Medicago sativa L.) oleh Fa-wei WANG, Chao WANG, Yao SUN, Nan WANG, Xiao-wei LI, Yuan-yuan DONG, Na YAO, Xiu-ming LIU, Huan CHEN, Xi-feng CHEN, Zhen-min WANG, Hai-yan LI