Photosynthesis-light Response Curves Characteristics of Dominant Plants in Alpine Grassland Researches on photosynthetic characteristics of exotic plants Wedelia trilobata,Pharbitis nil and Ipomoea cairica Applications studies of the modified exponential model on photosynthesis—light response and CO2 response curves of Mirabilis jalapa Study on the Photosynthetic Characteristics of Bothriochloa ischaemum under Different Water and Nutrient Conditions Ⅱ. Light-Response Curve COMPARISON OF BASIC PHOTOSYNTHETIC CHARACTERISTICS BETWEEN EXOTIC INVADER WEED MIKANLA MICRANTHA AND ITS COMPANION SPECIES Comparison of Two Photosynthesis-light Response Curve-fitting Models of the Karst Plant Applications studies of the modified exponential model on photosynthesis—light response and CO2 response curves of Mirabilis jalapa