植物生态学报 ›› 2008, Vol. 32 ›› Issue (6): 1356-1361.DOI: 10.3773/j.issn.1005-264x.2008.06.016

• 研究论文 • 上一篇    下一篇

光合作用光响应模型的比较

叶子飘1,*(), 于强2   

  1. 1 井冈山大学数理学院, 江西吉安 343009
    2 中国科学院地理科学与资源研究所, 北京 100101
  • 收稿日期:2007-09-30 接受日期:2008-02-27 出版日期:2008-09-30 发布日期:2008-11-30
  • 通讯作者: 叶子飘
  • 作者简介:*(yezp@jgsu.edu.cn)
  • 基金资助:
    江西省科技厅农业攻关项目(吉市科技字[2006]21号);中国高技术发展计划项目(O6F60080AH)

COMPARISON OF NEW AND SEVERAL CLASSICAL MODELS OF PHOTOSYNTHESIS IN RESPONSE TO IRRADIANCE

YE Zi-Piao1,*(), YU Qiang2   

  1. 1College of Sciences, Jinggangshan University, Ji’an, Jiangxi 343009, China
    2Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China
  • Received:2007-09-30 Accepted:2008-02-27 Online:2008-09-30 Published:2008-11-30
  • Contact: YE Zi-Piao

摘要:

用美国Li-Cor公司生产的Li-6400光合作用测定仪控制CO2浓度和温度, 测量了华北平原冬小麦(Triticum aestivum)的光响应数据。分别用C3植物光响应新模型、直角双曲线模型、非直角双曲线模型和Prado-Moraes模型拟合这些实测数据, 分析了由直角双曲线模型、非直角双曲线模型和Prado-Moraes模型拟合这些数据得到的最大净光合速率(The maximum net photosynthetic rate)远大于实测值, 而光饱和点(Light saturation point)远小于实测值的原因。结果表明, 由C3植物光响应新模型拟合的结果与实测数据符合程度最高(R2=0.999 4和R2=0.998 7); 表观量子效率(Apparent quantum yield)不是一个理想的表示植物利用光能的指标, 建议用植物光响应曲线在光补偿点处的量子效率作为表示植物光能利用的指标。

关键词: 光响应新模型, 冬小麦, 最大净光合速率, 光饱和点, 表观量子效率

Abstract:

Aims Our objective is to compare a new photosynthetic light-response model with the non-rectangular hyperbola, rectangular hyperbola, and Prado-Moraes model in fitting data and obtaining the maximum net photosynthetic rate and the light saturation point.

Methods We measured the light-response of photosynthetic rate of winter wheat (Triticum aestivum) under the same chamber CO2 concentration and different air temperatures in North China Plain using a gas analyzer Li-6400. The measured data were simulated by the new photosynthetic light-response model and the non-rectangular hyperbola, rectangular hyperbola and Prado-Moraes models, respectively.

Important findings The new photosynthetic light-response model shows advantage over the non-rectangular hyperbola, rectangular hyperbola, and Prado-Moraes models in fitting data on the maximum net photosynthetic rate and the light saturation point. The main photosynthetic parameters calculated by the new one were very close to the measured data (R2=0.999 4 and R2=0.998 7). Results showed that the apparent quantum was not an ideal indicator to assess the light use efficiency of plants. We suggest the apparent quantum yield be replaced by the quantum yield at the light compensation point due to the unity of the quantum yield for any C3plantspecies under certain environmental conditions.

Key words: new photosynthetic light-response model, winter wheat (Triticum aestivum), the maximum net photosynthetic rate, light saturation point, apparent quantum yield