Optimization Conditions of Fermentation and Separation and Purification of Reduced-Glutathione Effects of Seed-coating Agents on Physiological,Biochemical and Chlorophyll Fluorescence Characteristics in Leaves of Rice Seedlings Effects of GSH on AsA-GSH Circulation Metabolism in Chloroplasts of Young Loquat Fruits Under Low Temperature Stress Leaf Senescence and Membrane Lipid Peroxidation in Sugarcane