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

  • Received Date: 2004-10-08
  • Rev Recd Date: 2005-01-17
  • Publish Date: 2005-08-20
通讯作者: 陈斌, bchen63@163.com
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    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

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 .]

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.

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