摘要
通过控制光强度、CO2浓度和温度等因素,研究华北平原冬小麦(Triticum aestivum)在抽穗期旗叶光合作用对光响应、CO2响应以及气孔导度对光的响应。结果表明:在控制环境条件下,光合速率随光强度的增加而增大直至饱和光强度,然后随光强度的增加而降低直至出现光抑制;光合速率随CO2浓度的增加而增加,达到饱和CO2浓度后,光合速率几乎不变;冬小麦叶片气孔导度随光强度的增加而增加直至饱和光强度,然后随光强度的增加而降低。在气温为20和25℃、CO2浓度相同(360μmol.mol-1)的条件下,冬小麦的最大光合速率几乎不变,但温度影响冬小麦的饱和光强度。
Photosynthetic response to irradiance and CO2,stomatal conductance response to irradiance used by flag leaves of winter wheat（Triticum aestivum） under control environmental conditions were studied in China Northern Plain while winter wheat was heading stage.Photosynthetic rates increased with light intensity below saturation light intensity.Then the photosynthetic rates decreased with light intensity above the saturation light intensity,appeared photoinhibition.Photosynthetic rates increased with C02 concentrations below saturation CO2 concentration.Then the photosynthetic rates almost kept stable above saturation CO2 concentration.It showed that the ambient temperature affected the saturation light intensity,but the maximum photosynthetic rate for winter wheat almost kept stable while the ambient temperature was 20 ℃ and 25 ℃,and the ambient CO2 concentration was the same,360 μmol mol^-1.
出处
《扬州大学学报（农业与生命科学版）》
CAS
CSCD
北大核心
2008年第3期33-37,共5页
Journal of Yangzhou University：Agricultural and Life Science Edition
基金
国家重点基础科学基金资助项目(2005CB121106)
江西省科技厅农业攻关项目(吉市科技字[2006]21号)
关键词
冬小麦
气孔导度
最大光合速率
光合能力
饱和光强度
饱和CO2浓度
光抑制
winter wheat
stomatal conductance
maximum photosynthetic rates
photosynthetic capacity
saturation light intensity
saturation CO2 concentration
photoinhibition
