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

WANG Xiao-yan; YANG Shu-zhen; ZHAO Ming-shui; LUO Yuan; CUI Min-yan; LI Yuan-yuan; 

doi:10.3969/j.issn.1000-5641.2015.02.014

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May 2015

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Article Navigation > Journal of East China Normal University (Natural Sciences) > 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 Sciences), 2015, (2): 113-121. doi: 10.3969/j.issn.1000-5641.2015.02.014

Citation:

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 Sciences), 2015, (2): 113-121. doi: 10.3969/j.issn.1000-5641.2015.02.014

Citation:

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 Sciences), 2015, (2): 113-121. doi: 10.3969/j.issn.1000-5641.2015.02.014

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

doi: 10.3969/j.issn.1000-5641.2015.02.014

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 Date: 2014-03-31
Publish Date: 2015-03-25

Abstract

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.
- Ostrya rehderianaAcer yangjuechiphotosynthesistranspirationdiurnal variation,

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