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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 | |
| 引用本文： | 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 |
| 作者姓名： | 王晓燕 杨淑贞 赵明水 罗远 崔敏燕 李媛媛 |
| 作者单位： | 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 |
| 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(p0.05),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(p0.05),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(p0.05),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 |
| 收稿时间： | 2014-03-31 |
Comparative diurnal variations in photosynthesis and transpiration of endangered plant species,Ostrya rehderiana and Acer yangjuechi |
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| 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 Science), 2015, 2015(2): 113-121 | |
| Authors: | WANG Xiao-yan YANG Shu-zhen ZHAO Ming-shui LUO Yuan CUI Min-yan LI Yuan-yuan |
| Affiliation: | 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 |
| 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. |
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