植物学报 ›› 2012, Vol. 47 ›› Issue (3): 257-263.DOI: 10.3724/SP.J.1259.2012.00257

• 研究报告 • 上一篇    下一篇

翅果油树叶性特征的动态变化

苗艳明, 吕金枝, 毕润成*, 闫桂琴*   

  1. 山西师范大学生命科学学院, 临汾 041000
  • 收稿日期:2011-10-17 修回日期:2012-03-02 出版日期:2012-05-01 发布日期:2012-07-06
  • 通讯作者: 毕润成;闫桂琴
  • 基金资助:

    山西省留学基金项目

Dynamic Changes of Traits of Leaves from Elaeagnus mollis

Yanming Miao, Jinzhi Lü, Runcheng Bi*, Guiqin Yan*   

  1. School of Life Science, Shanxi Normal University, Linfen 041000, China
  • Received:2011-10-17 Revised:2012-03-02 Online:2012-05-01 Published:2012-07-06
  • Contact: Runcheng Bi; Guiqin Yan

摘要: 以山西翼城翅果油树(Elaeagnus mollis)自然保护区的翅果油树为研究对象, 利用LI-3000A叶面积测定仪测量其单叶面积, 用Li-6400便携式光合作用测定系统测定单位叶面积饱和光合速率(Aarea), 用H2SO4-H2O2消煮法测定叶氮含量, 计算叶性参数比叶面积(SLA)、单位叶重量饱和光合速率(Amass)、光合氮利用率(PNUE)和单位重量叶氮含量(Nmass)的值, 并研究它们与径级之间的关系。结果表明: 随着翅果油树径级的增加, SLANmassAareaAmassPNUE值先下降后上升, 当翅果油树径级为7.5 cm左右时, SLANmassAareaAmassPNUE值均降到最小值, 表明径级为7.5 cm左右的翅果油树其光合能力最弱、光合氮利用率较低且生存压力较大。翅果油树叶性参数是研究翅果油树种群动态变化的有效指标, 可为研究翅果油树种群动态提供更为便捷的方法。

Abstract: We investigated leaf traits of Elaeagnus mollis in the Elaeagnus mollis Nature Reserve of Yicheng County, Shanxi Province. Leaf areas were estimated with use of a Li-3000A Leaf Area Meter, and the maximum photosynthetic rate per unit area (Aarea) was measured by Li-6400 portable photosynthesis system. N content was measured by the H2SO4-H2O2 method. We also calculated the SLA, the maximum photosynthetic rate per unit mass (Amass), photosynthetic N use efficiency (PNUE) and leaf N content per unit mass (Nmass). As well, we analyzed the interaction between them and size classes. With increasing size of E. mollis, SLA, Aarea, Nmass and PNUE decreased and then increased. With size of about 7.5 cm, SLA, Aarea, Nmass and PNUE reached the minimum value, so the photosynthetic capacity and PNUE were comparatively low under this condition, and the survival pressure became greater. Leaf trait variables of E. mollis are effective targets to study population dynamics changes and are convenient for study.

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