Role of D1 Protein Turnover and Xanthophylls Cycle in Protecting of Photosystem Ⅱ Functions in Leaves of Morus alba under NaCl Stress Diurnal Photosynthesis and Photoinhibition of Rice Leaves with Chlorophyll Fluorescence Protein Turnover of Wheat in Different Planting Modes at the Kernel-filling Stage Photoinhibition and 77K Fluorescence Spectra in the Flag Leaves of Super-high Hybrid Rice (Oryza sativa L.) THE RESEARCH METHODS AND MODEL OF PROTEIN TURNOVER IN ANIMAL