A REVIEW OF ADAPTABLE VARIATIONS AND EVOLUTION OF PHOTOSYNTHETIC CARBON ASSIMILATING PATHWAY IN C3 AND C4 PLANTS Riparian C4 Plants on the Mainstream of the Yellow River:Assemblage Characteristics and Their Indication on the Effects of Reservoirs NEW C4 AND CAM PLANTS Effect of the amount of C3 or C4 plants in diets on the quality and main chemical components of beef Diurnal Changes of Chlorophyll Fluorescence Quenching and the Response to Photooxidation in Leaves of C3 and C4 Plants