Effects of Ca2+ Pretreatment on Plasmalemma Permeability, GSH and AsA Contents, and Calcium Distribution in Pepper Mesophyll Cells Under Heat Stress Effects of NaCl Stress on Plasmalemma and Tonoplast H+-ATPase Activities in Seedling Roots of Lycium barbarum in Ningxia Hui Autonomous Region Physiological compared study at the jointing on near-isogenic lines wheat at salt-stress