光和CO2作用下C3和C4作物气孔导度-光合速率耦合关系的差异

doi:10.7668/hbnxb.2008.01.016

华北农学报 ›› 2008, Vol. 23 ›› Issue (1): 71-75. doi: 10.7668/hbnxb.2008.01.016

光和CO₂作用下C₃和C₄作物气孔导度-光合速率耦合关系的差异

王建林¹, 林荣芳¹, 于贵瑞², 房全孝¹, 姜德锋¹, 齐华³, 王秋凤², 李举华¹, 刘兆丽¹

1. 青岛农业大学, 山东青岛 266109;
2. 中国科学院地理科学与资源研究所, 北京 100101;
3. 沈阳农业大学, 辽宁沈阳 110161

收稿日期:2007-12-28 出版日期:2008-02-28
作者简介:王建林(1976-),男,河北唐山人,副教授,博士,硕士生导师,主要从事植物生理生态方面研究。
基金资助:
国家杰出青年基金(30225012);山东省中青年科学家奖励基金(2005BSB01177)

Variations in Relationship Between Stomotal Conductance and Photosynthesis Rate in C₃ and C₄ Crops under Different Light and CO₂ Conditions

WANG Jian-lin¹, LIN Rong-fang¹, YU Gui-rui², FANG Quan-xiao¹, JIANG Defeng¹, QI Hua³, WANG Qiu-feng², LI Ju-hua¹, LIU Zhao-li¹

1. Qingdao Agricultural University, Qingdao 266109, China;
2. Institute of Geographic Sciences and Natural resources Research, Chinese Academy of Sciences, Beijing 100101, China;
3. Shenyang Agricultural University, Shenyang 110161, China

Received:2007-12-28 Published:2008-02-28

摘要/Abstract

摘要： 气孔控制着光合作用和蒸腾作用两个相互耦合的过程,气孔导度与光合速率的耦合关系是理解陆地生态系统碳循环和水循环及其耦合关系的基础。利用LI-6400光合仪控制光强和CO₂浓度变化,分析了C₃和C₄₂浓度变化条件下,Ball-Berry模型也能很好地模拟气孔导度与光合速率二者的耦合关系。气孔导度与净光合速率之间的耦合系数体现了不同作物之间水-碳交换比例的差异,反映了气孔限制和内部生理生化过程限制在不同作物上所占的比例。由于该系数在C₃作物和C₄₃作物中,陆生C₃作物和水生C₃作物也存在一定差异,因此作物的生态功能类型可以大体划分为3类:C₄₃作物和水生C₃作物。这种生态功能类型的划分为提高碳循环、水循环以及水碳耦合循环模型在区域尺度上应用的精度是有益的。

关键词: C₃作物, C₄

Abstract: The coupled processes of leaf photosynthesis and transpiration are controlled by stomotal,and the relation2ship between stomotal conductance and photosynthesis rate is the basis of understanding carbon and water cycle in terres2trial ecosystem. The differences in the relationship between stomotal conductance and photosynthesis rate in C3and C₄plant species were studied under controlled light density and CO₂concentration by LI26400 Portable Photosynthesis Sys2tem. The results showed:Ball2Berry model can reasonably simulate the relation between stomotal conductance and photo2synthesis rate even under various CO₂concentration conditions. The coefficient between stomotal conductance and photo2synthesis rate revealed the difference in the ratio of water2carbon exchange,and in the limitations of stomotal and interphysiochemical processes between the different crop types.Because obvious differences in the coefficient between stomotalconductance and photosynthesis rate were found between C₃and C4crops,and between terricolous and aquicolous C₃crops,the crop ecotype can be generally distinguished three types:C4,terricolous and aquicolous C₃crops. The differentia2tion of crop ecotype will improve the accuracy in modeling carbon and water cycle in regional scale.

Key words: C₃crop, C₄crop, Stomotal conductance, Photosynthesis rate, Ecotype

中图分类号:

Q945

王建林, 林荣芳, 于贵瑞, 房全孝, 姜德锋, 齐华, 王秋凤, 李举华, 刘兆丽. 光和CO₂作用下C₃和C₄作物气孔导度-光合速率耦合关系的差异[J]. 华北农学报, 2008, 23(1): 71-75. doi: 10.7668/hbnxb.2008.01.016.

WANG Jian-lin, LIN Rong-fang, YU Gui-rui, FANG Quan-xiao, JIANG Defeng, QI Hua, WANG Qiu-feng, LI Ju-hua, LIU Zhao-li. Variations in Relationship Between Stomotal Conductance and Photosynthesis Rate in C₃ and C₄ Crops under Different Light and CO₂ Conditions[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2008, 23(1): 71-75. doi: 10.7668/hbnxb.2008.01.016.

http://www.hbnxb.net/CN/Y2008/V23/I1/71

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光和CO₂作用下C₃和C₄作物气孔导度-光合速率耦合关系的差异

Variations in Relationship Between Stomotal Conductance and Photosynthesis Rate in C₃ and C₄ Crops under Different Light and CO₂ Conditions

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