草业学报2013，Vol.22Issue(2)：307-312,6.
4个地理种源白刺气体交换特性比较
Comparative analysis on gas exchange characteristics of four geographical provenances of Nitraria tangutorum
摘要
Abstract
Photosynthesis is one of the important activities which affect plant growth. The open gas exchange system, Locpro Portable Photosynthesis System, was used to study the change in daily photosynthesis and light-response curves of four geographic provenances (Jinta: JT, Linze: LZ, Minqin: MQ, Jiuzhoutai: JZT) of Nitraria tangutorumon. The daily change of net photosynthetic rate (Pn) and transpiration rate (Tr) of the four geographical provenances were single-peak curves. The Pn, stomatal conductance (Gs), water use efficiency (WUE), light saturation point (LSP) and light compensation point (LCP) of these provenances differed from Jinta, Linze and Minqin to Jiuzhoutai geographical provenance. The capacity of Jinta provenance using high intensity illumination was the highest, and its LSP was up to (1 800±68) μmol/m2 · s. The capacity of Jiuzhoutai provenance using low light was higher than that of any other provenance and its LCP was (25. 52± 17) μmol/m2 · s. The results from the four geographical provenances showed that N. tangutorum is a helio-phyte and wide domain species with high adaptability to illumination. It is concluded that photosynthesis of N. tangutorum is very sensitive to variations of water because in the Jinta provenance original habitat it grew in the drought and had a high photosynthetic ability.关键词
地理种源/白刺/气体交换/光响应曲线Key words
geographical provenances/ Nitraria tangutorum/ gas exchange/ light-response curve分类
农业科技引用本文复制引用
种培芳,苏世平,高暝,李毅,孙兆成..4个地理种源白刺气体交换特性比较[J].草业学报,2013,22(2):307-312,6.基金项目
科技部农业科技成果转化资金项目(2009GB2G100375),甘肃省财政厅高等学校基本科研业务费项目和国际科技合作与交流专项项目(2012DFR30830)资助. （2009GB2G100375）
