Photosynthetic Characteristics and Heterosis in Transgenic Hybrid Rice with Maize Phosphoenolpyruvate Carboxylase (pepc) Gene by MAS Constructing of Sense and Antisense pepc Expression Vector of Jatropha curcas and the Transformation Regulation of pepc gene expression in Anabaena sp. PCC 7120 and its effects on cyclic electron flow around photosystem I and tolerances to environmental stresses Cloning and Expression Analysis of Phosphoenolpyruvate Carboxylase Gene pepc from Cassava (Manihot esculenta Crantz) Photosynthetic Characteristics for Rice Hybrids with Transgenic PEPC Parent HPTER-01 Cloning and Sequence Analysis of Full-length cDNA ofpepc Gene from Jatropha curcas