Photosynthetic Characteristics of Transgenic Rice Plants Overexpressing Maize Phosphoenopyruvate Carboxylase The Diurnal Changes of Photosynthesis in the Endangered Plant Sinocalycanthus chinensis and Its Accompanying Plants Diurnal changes of photosynthetic characteristics of Hippophae rhamnoides and the relevant environment factors at different slope locations Photosynthetic Characteristics of Some Anemone Species at Reproductive Growth Stage