Enzyme activities in snail, Oncomelania hupensis from river beach and its agro-forestry systems Glutamate oxaloacetate transaminase isozyme in 10 species of genus Epimedium Establishment of 6VS Telocentric Lines of Haynaldia villosa Resistant to Powdery Mildew Induced by Immature Embryo Culture Photosynthetic C4-Microcycle in Transgenic Rice Plant Lines Expressing the Maize C4-Photosynthetic Enzymes