Characteristics of CO2 Exchange and Chlorophyll Fluorescence of Transgenic Rice with C4 Genes EFFECT OF ABA AND 6-BA ON ACTIVITY OF KEY ENZYMES IN CARBON ASSIMILATION IN MAIZE SEEDLINGS UNDER WATER STRESS Codon Bias of Pyruvate Orthophosphate Dikinase Gene in Amaranthus hypochondriacus Expression Characteristic on TaPDC-E1a Gene and Its regulatory Enzymes Gene in Male Sterile Line of Wheat (Triticum aestivum) Sequence Analysis, Prokaryotic Expression and Purification of TaPDK Gene in Wheat (Triticum aestivum L.) Photosynthetic Pathway of Three Rattan Species in South China