Chin Bull Bot ›› 2012, Vol. 47 ›› Issue (3): 257-263.doi: 10.3724/SP.J.1259.2012.00257

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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:2012-07-06 Published:2012-05-01
  • Contact: Runcheng Bi; Guiqin Yan E-mail:sxrcbi@126.com; gqyan@126.com

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.

CLC Number: 

  • Q945

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