华东师范大学学报(自然科学版) ›› 2015, Vol. 2015 ›› Issue (2): 113-121.doi: 10.3969/j.issn.1000-5641.2015.02.014

• 生态学 生命科学 • 上一篇    下一篇

濒危植物天目铁木和羊角槭的光合及蒸腾特性日动态比较

王晓燕1, 3,杨淑贞2,赵明水2,罗远2,崔敏燕1,李媛媛1   

  1. 1. 华东师范大学 生态与环境科学学院,浙江天童国家森林生态系统野外观测研究站,上海200241;
    2. 浙江天目山国家级自然保护区管理局,浙江临安311311;3. 台州学院 生命科学学院,浙江台州318000
  • 收稿日期:2014-03-31 出版日期:2015-03-25 发布日期:2015-05-28
  • 通讯作者: 李媛媛,女,博士,副教授,研究方向为保护生物学和分子生态学. E-mail:yyli@des.ecnu.edu.cn
  • 作者简介:王晓燕,女,博士,研究方向为分子生态学. E-mail: wxy3470117@163.com
  • 基金资助:

    浙江省临安市科委项目

Comparative diurnal variations in photosynthesis and transpiration of endangered plant species, Ostrya rehderiana and Acer yangjuechi

WANG Xiao-yan1, 3,YANG Shu-zhen2,ZHAO Ming-shui2,LUO Yuan2,CUI Min-yan1,LI Yuan-yuan1   

  1. 1. Tiantong National Field Observation Station for Forest Ecosystem, School of Ecological and  Environmental Sciences, East China Normal University, Shanghai200241, China;
    2. Management Bureau of Tianmushan National Nature Reserve, Lin′an Zhejiang311311, China; 
    3. School of Life Science, Taizhou University, Taizhou Zhejiang318000, China
  • Received:2014-03-31 Online:2015-03-25 Published:2015-05-28

摘要: 分别对浙江西天目山濒危植物天目铁木(Ostrya rehderiana)和羊角槭(Acer yangjuechi)进行叶片气体交换参数日动态测定,探讨其光合与蒸腾作用的影响因素,比较光能利用效率和水分利用效率.结果显示,天目铁木的净光合速率日动态有午休现象;当光合有效辐射没有显著差异时,天目铁木的净光合速率显著大于羊角槭(p<0.05),与其林冠层阳生环境相适应;二者光能利用效率日变化无明显差异,但弱光条件下,羊角槭的光能利用效率高于天目铁木(p<0.05),与其林下层耐阴植物的特性相符;二者的水分利用效率日动态不同,羊角槭高于天目铁木(p<0.05),表明羊角槭蒸腾活动降低而导致.

关键词: 天目铁木, 羊角槭, 光合作用, 蒸腾, 日动态

Abstract: In order to compare the differences of gas exchange between suntolerant and shadetolerant plants, diurnal variations in photosynthetic and transpiration indices were measured using LI6400 portable photosynthesis system in two endangered species, Ostrya rehderiana Chun (suntolerance) and Acer yangjuechi Fang et P. L. Chiu (shadetolerance). Our results showed that O. rehderiana was a bimodal curve in diurnal change of photosynthesis rate (Pn), while A. yangjuechi was a unimodal curve.  A. yangjuechi had a higher light use efficiency (RUE) than O. rehderiana under a relatively weak light (p<0.05), suggesting A. yangjuechi had an increased net photosynthesis rate (P n) in weaker light conditions, e.g. under a longterm shade circumstance. The water use efficiency (WUE) was also higher in A. yangjuechi than in O. rehderiana (p<0.05). This indicated A. yangjuechi had a lower transpiration in shaded conditions.

Key words: Ostrya rehderiana, Acer yangjuechi, photosynthesis, transpiration, diurnal variation

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