%0 Journal Article
%T Correlations between leaf δ13C and physiological parameters of desert plant Reaumuria soongorica<br>荒漠植物红砂叶片δ13C值与生理指标的关系
%A MA Jian-ying
%A CHEN Fa-hu
%A XIA Dun-sheng
%A SUN Hui-ling
%A DUAN Zheng-hu
%A WANG Gang
%A <br>马剑英
%J 应用生态学报
%D 2008
%I 
%X Reaumuria soongorica is a dominant species in the desert shrubbery vegetation in arid regions of northwestern China, playing an important role in the maintenance of the stability and continuity of desert ecosystem. In this paper, a total of 407 individuals in 21 natural populations of R. soongorica were selected from its main distribution areas to measure the leaf stable carbon isotope composition (delta13C) and nitrogen, phosphorus, potassium, water, proline and chlorophyll contents, with the correlations between the delta13C value and the test physiological parameters analyzed. The results showed that leaf delta13C value was significantly correlated with the contents of leaf potassium, water, and proline (P <0.001), and the correlation with leaf potassium content was most profound (r = 0.793), followed by that with leaf water content (r = -0.786), indicating that the variation of leaf delta13C value could reflect the nutritional status of the plants, and also, their water-deficient degree. The different distribution trends in leaf delta13C value of R. soongorica were likely caused by stomatal conductance, rather than by nutrient-related changes in photosynthetic efficiency under extremely low available water conditions.
%K 稳定碳同位素值
%K 生理指标
%K 气孔导度
%K 红砂
%K 荒漠植物
%K 红砂
%K 叶片δ
%K 生理指标
%K 关系
%K leaf
%K Correlations
%K plant
%K desert
%K 环境变化
%K 气孔导度
%K 干旱条件
%K 变化状况
%K 元素含量
%K 植物营养
%K 差异
%K 不同种群
%K 程度
%K 水分亏缺
%K 影响
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=90BA3D13E7F3BC869AC96FB3DA594E3FE34FBF7B8BC0E591&jid=42FEDDFE54F8BCD9D5FD1926ABDD7722&aid=C2ABDB14F3F3F65BFD8073EFFC7CE90F&yid=67289AFF6305E306&vid=2A8D03AD8076A2E3&iid=94C357A881DFC066&sid=811F346FF129CCCC&eid=D610BE6A5A0C75BF&journal_id=1001-9332&journal_name=应用生态学报&referenced_num=0&reference_num=35