%0 Journal Article
%T PHOTOSYNTHETIC CHARACTERISTICS OF SIX PLANT SPECIES IN A FOREST STEPPE OF THE LOESS PLATEAU, CHINA<br>黄土高原森林草原区6种植物光合特性研究
%A XU Hong_Mei
%A GAO Qiong
%A HUANG Yong_Mei
%A JIA Hai_Kun
%A <br>许红梅
%A 高琼
%A 黄永梅
%A 贾海坤
%J 植物生态学报
%D 2004
%I Editorial Office of Chinese Journal of Plant Ecology
%X Diurnal net photosynthetic and transpiration rates of six plant species on the Loess Plateau were measured in the field during May, July, and September 2002. Photosynthetic characteristics of these species were quantified by applying a model of net photosynthesis and stomatal conductance to the field data. The results indicated that the model could explain up to 79% and 59% of the variation in the net photosynthetic rate and stomatal conductance, respectively. Hippophae rhamnoides and Artemisia capillaris had higher net photosynthetic rates than the other species because these species had high biochemical photosynthetic efficiencies whereas the other species had low photorespiration coefficients. An afternoon depression in photosynthetic rates in Robinia pseudoacacia, Hippophae rhamnoides L. subsp. sinensis Rousi, Artemisia gmelinii and A. capillaris was explained by decreased stomatal conductance, and, in Malus pumila and Caragana korshinskii, the reduction was due to decreased biochemical photosynthetic capacity. These field results provide a basis for future laboratory studies to better understand the ecophysiological properties of these plants.
%K Net photosynthesis rate
%K Stomatal conductance
%K Guard cell
%K Carbon assimilation
%K Photorespiration<br>净光合速率
%K 气孔导度
%K 保卫细胞
%K 碳同化
%K 光呼吸
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=90BA3D13E7F3BC869AC96FB3DA594E3FE34FBF7B8BC0E591&jid=2F2173CCFF292BF447DC2681EA33BBAE&aid=3243A7104C6AAB1A&yid=D0E58B75BFD8E51C&vid=D3E34374A0D77D7F&iid=0B39A22176CE99FB&sid=0B4F496D54044D86&eid=D5C9DC4EF2F78008&journal_id=1005-264X&journal_name=植物生态学报&referenced_num=14&reference_num=54