Gas exchange with <EM>Phyllostachys pubescens</EM> on Mount Tianmu，Zhejiang Province

LIN Qiong-ying; CHEN Jian-xin; YANG Shu-zhen; WEN Guo-sheng

Volume 25 Issue 4

Aug. 2008

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LIN Qiong-ying, CHEN Jian-xin, YANG Shu-zhen, WEN Guo-sheng. Gas exchange with Phyllostachys pubescens on Mount Tianmu，Zhejiang Province[J]. Journal of Zhejiang A&F University, 2008, 25(4): 522-526.

Citation:

LIN Qiong-ying, CHEN Jian-xin, YANG Shu-zhen, WEN Guo-sheng. Gas exchange with Phyllostachys pubescens on Mount Tianmu，Zhejiang Province[J]. Journal of Zhejiang A&F University, 2008, 25(4): 522-526.

Gas exchange with Phyllostachys pubescens on Mount Tianmu，Zhejiang Province

1.
School of Forestry and Biotechnology，Zhejiang Forestry College，Lin’an 311300，Zhejiang，China;
2.
Management Office，National Nature Reserve of Mount Tianmu，Lin’an 311300，Zhejiang，China

Publish Date: 2008-08-20

Abstract

Moso bamboo（Phyllostachys pubescens） is a fast growing bamboo species with important economic and ecological value. The objective is to grasp of the spatio-temporal dynamics of photosynthesis in moso bamboo leaf. In autumn 2006，a Li-6400 portable photosynthesis system was set up in natural field conditions to determine diurnal variation of gas exchange and response of photosynthesis to light intensities in different layers of the bamboo canopy （1st－7th branches from low to up was upper layer，8th - 14th was middle layer，and≥15th was upper layer）. Results showed that for diurnal changes in autumn，the net photosynthetic rate（Pn） had a double-peaked curve with peaks at about 09:00（am） and about 15:00 （pm） and a “midday depression” from 11:00 －14:00，which was due to the absence of irradiance and closure of some stomata. Also，the diurnal transpiration rate was a single-peaked curve，while the diurnal water use efficiency（WUE） was a double-peaked curve. Additionally，light response in the upper and lower layers of the bamboo stand showed that with the same photosynthetic photon flux density，Pn was greater in the upper layer. Adaptations of leaves in the two layers may have caused the difference light intensities with leaves in the upper layer better adapted to the stronger light. ［Ch，6 fig. 22 ref.］
- botany,
- Phyllostachys pubescens（moso bamboo）,
- gas exchanges,
- diurnal variation,
- light response,
- photosynthesis midday depression

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通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

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Gas exchange with Phyllostachys pubescens on Mount Tianmu，Zhejiang Province

1. School of Forestry and Biotechnology，Zhejiang Forestry College，Lin’an 311300，Zhejiang，China;

2. Management Office，National Nature Reserve of Mount Tianmu，Lin’an 311300，Zhejiang，China

Publish Date: 2008-08-20

Key words:

Abstract: Moso bamboo（Phyllostachys pubescens） is a fast growing bamboo species with important economic and ecological value. The objective is to grasp of the spatio-temporal dynamics of photosynthesis in moso bamboo leaf. In autumn 2006，a Li-6400 portable photosynthesis system was set up in natural field conditions to determine diurnal variation of gas exchange and response of photosynthesis to light intensities in different layers of the bamboo canopy （1st－7th branches from low to up was upper layer，8th - 14th was middle layer，and≥15th was upper layer）. Results showed that for diurnal changes in autumn，the net photosynthetic rate（Pn） had a double-peaked curve with peaks at about 09:00（am） and about 15:00 （pm） and a “midday depression” from 11:00 －14:00，which was due to the absence of irradiance and closure of some stomata. Also，the diurnal transpiration rate was a single-peaked curve，while the diurnal water use efficiency（WUE） was a double-peaked curve. Additionally，light response in the upper and lower layers of the bamboo stand showed that with the same photosynthetic photon flux density，Pn was greater in the upper layer. Adaptations of leaves in the two layers may have caused the difference light intensities with leaves in the upper layer better adapted to the stronger light. ［Ch，6 fig. 22 ref.］

Gas exchange with Phyllostachys pubescens on Mount Tianmu，Zhejiang Province

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通讯作者: 陈斌, bchen63@163.com

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Gas exchange with Phyllostachys pubescens on Mount Tianmu，Zhejiang Province

1. School of Forestry and Biotechnology，Zhejiang Forestry College，Lin’an 311300，Zhejiang，China;

2. Management Office，National Nature Reserve of Mount Tianmu，Lin’an 311300，Zhejiang，China

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Gas exchange with Phyllostachys pubescens on Mount Tianmu，Zhejiang Province

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通讯作者: 陈斌, bchen63@163.com

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Gas exchange with Phyllostachys pubescens on Mount Tianmu，Zhejiang Province

1. School of Forestry and Biotechnology，Zhejiang Forestry College，Lin’an 311300，Zhejiang，China; 2. Management Office，National Nature Reserve of Mount Tianmu，Lin’an 311300，Zhejiang，China

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1. School of Forestry and Biotechnology，Zhejiang Forestry College，Lin’an 311300，Zhejiang，China;

2. Management Office，National Nature Reserve of Mount Tianmu，Lin’an 311300，Zhejiang，China