Photosynthesis-light Response Curves Characteristics of Dominant Plants in Alpine Grassland Comparison between modified exponential model and common models of light-response curve Research on limiting factors of photosynthesis in Coptis chinensis leaves under short-term drought Comparison of photosynthetic characteristics between an endangered species Camellia pubipetala and its widespread congener C. sinensis Analysis of photosynthetic characteristics and its influencing factors of medicinal plant Mirabilis himalaica Light Response Characteristics of Azadirachta indica Provenances in Different Growing Seasons Within Crowns Research on limiting factors of photosynthesis in Coptis chinensis leaves under short-term drought