Diurnal variation of leaf gas exchange in <em>Cyclobalanopsis multinervis</em> and <em>Michelia foveolata</em> seedlings under different shadings

LI Xiao-zheng; PENG Feng; XU Ying-chun; HAO Ri-ming

Volume 22 Issue 4

Feb. 2017

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LI Xiao-zheng, PENG Feng, XU Ying-chun, HAO Ri-ming. Diurnal variation of leaf gas exchange in Cyclobalanopsis multinervis and Michelia foveolata seedlings under different shadings[J]. Journal of Zhejiang A&F University, 2005, 22(4): 380-384.

Citation:

LI Xiao-zheng, PENG Feng, XU Ying-chun, HAO Ri-ming. Diurnal variation of leaf gas exchange in Cyclobalanopsis multinervis and Michelia foveolata seedlings under different shadings[J]. Journal of Zhejiang A&F University, 2005, 22(4): 380-384.

Diurnal variation of leaf gas exchange in Cyclobalanopsis multinervis and Michelia foveolata seedlings under different shadings

1.
.Department of Civil Engineering , Guangxi Vocational &Technical College of Communication, Nanning 530023 , Guangxi , China;
2.
Horticultural College of Nanjing Agricultural University , Nanjing 210095, Jiangshu, China;
3.
. Institute of Botany , Jiangsu Province and Chinese Academy of Sciences , Nanjing 210014, Jiangshu, China

Received Date: 2004-10-08
Rev Recd Date: 2005-01-17
Publish Date: 2005-08-20

Abstract

Leaf gas exchange of photosynthesis in Cyclobalanopsis multinervis and Michelia foveolata seedlings were studied by ecophysiological techniques under full light , one-layer shading and two-layer shading .The curves of leaf gas exchange diurnal variation in C .multinervis and M .foveolta were changed by shading .Photosynthetic rate of C .multinervis decreased obviously during daytime .With the increasing of shading , photosynthetic rate of M . foveolta decreased before noon , its photosynthetic rate was the highest at 11 :00 am under one layer shading . Moreover there was no significant difference of photosynthetic rates under full light and two-layer shading treatments after noon .Transpiration rate and stomatal conductance were decreased obviously by shading during daytime , but photosynthetic diurnal variation of intercellular CO2 concentration was contrary to that of photosynthetic rate . Photosynthetic rates of C .multinervis and M .foveolta decreased obviously at 1 :00 pm, which led to `midday depression of photosynthetic rate' .This study showed the diurnal variation of leaf gas exchange in C .multinervis and M .foveolata seedlings under different shadings and provided the scientific foundations for taking measures of scientific planting and management .[ Ch , 9 fig .12 ref .]
- plant physiology,
- shading,
- Cyclobalanopsis multinervis,
- Michelia foveolata,
- gas exchange

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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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Diurnal variation of leaf gas exchange in Cyclobalanopsis multinervis and Michelia foveolata seedlings under different shadings

1. .Department of Civil Engineering , Guangxi Vocational &Technical College of Communication, Nanning 530023 , Guangxi , China;

2. Horticultural College of Nanjing Agricultural University , Nanjing 210095, Jiangshu, China;

3. . Institute of Botany , Jiangsu Province and Chinese Academy of Sciences , Nanjing 210014, Jiangshu, China

Received Date: 2004-10-08

Rev Recd Date: 2005-01-17

Publish Date: 2005-08-20

Key words:

Abstract: Leaf gas exchange of photosynthesis in Cyclobalanopsis multinervis and Michelia foveolata seedlings were studied by ecophysiological techniques under full light , one-layer shading and two-layer shading .The curves of leaf gas exchange diurnal variation in C .multinervis and M .foveolta were changed by shading .Photosynthetic rate of C .multinervis decreased obviously during daytime .With the increasing of shading , photosynthetic rate of M . foveolta decreased before noon , its photosynthetic rate was the highest at 11 :00 am under one layer shading . Moreover there was no significant difference of photosynthetic rates under full light and two-layer shading treatments after noon .Transpiration rate and stomatal conductance were decreased obviously by shading during daytime , but photosynthetic diurnal variation of intercellular CO2 concentration was contrary to that of photosynthetic rate . Photosynthetic rates of C .multinervis and M .foveolta decreased obviously at 1 :00 pm, which led to `midday depression of photosynthetic rate' .This study showed the diurnal variation of leaf gas exchange in C .multinervis and M .foveolata seedlings under different shadings and provided the scientific foundations for taking measures of scientific planting and management .[ Ch , 9 fig .12 ref .]

Diurnal variation of leaf gas exchange in Cyclobalanopsis multinervis and Michelia foveolata seedlings under different shadings

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