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

doi:10.3969/j.issn.1000-5641.2015.02.014

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

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. 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-yan^{1, 3},YANG Shu-zhen²,ZHAO Ming-shui²,LUO Yuan²,CUI Min-yan¹,LI Yuan-yuan¹

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/Abstract

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 (P_n), 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

中图分类号:

王晓燕, 杨淑贞, 赵明水, 罗远, 崔敏燕, 李媛媛. 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[J]. 华东师范大学学报(自然科学版), 2015, 2015(2): 113-121.

WANG Xiao-Yan, YANG Shu-Zhen, ZHAO Ming-Shui, LUO Yuan, CUI Min-Yan, LI Yuan-Yuan. Comparative diurnal variations in photosynthesis and transpiration of endangered plant species, Ostrya rehderiana and Acer yangjuechi[J]. Journal of East China Normal University(Natural Sc, 2015, 2015(2): 113-121.

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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

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

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