The studies about the photosynthetic response of the four desert plants NITROGEN USE EFFICIENCY IN C3 AND C4 PLANTS The Distribution of Stomata and Photosynthetic Pathway in Leaves KRANZ ANATOMY AND C4 PHOTOSYNTHETIC CHARACTERISTICS OF TWO DESERT PLANTS, HALOXYLON AMMODENDRON AND CALLIGONUM MONGOLICUM Regulatory Mechanisms of C4 Photosynthesis Quantification of Leaf Anatomical Structure and Its Application in a C4 Plant, Sorghum The C4 Plants in Inner Mongolia and Their Eco-geographical Characteristics C4 Photosynthetic Enzymes and Antioxidant Enzymes Activities in Two Photosynthetic Subtypes of C4 Desert Plants under Soil Drought Stress Photorespiration of C4 Plants Stable carbon isotope variation in plants and their indicating significances along the inland Heihe River basin of northwestern China The Identification of Photosynthetic Subpathways of Some C4 and CAM Plants The biomass of C3 and C4 plant function groups in Leymus chinensis communities and theirs response to environmental change along Northeast China transect