生态学杂志2017，Vol.36Issue(9)：2535-2541,7.DOI:10.13292/j.1000-4890.201709.009
大豆叶片光呼吸对光强和CO2浓度的响应
Response of photorespiration of Glycine max leaves to light intensity and CO2 concentration
摘要
Abstract
The light and CO2-responses of photorespiration rate (Rp) of soybean (Glycine max) leaves were studied under 2％ and 21％ O2.The results showed that Rp of soybean leaves increased almost linearly with increasing photosynthetically active radiation (PAR) when PAR was less than 600 μmol m-2 s-1 ;Rp reached the maximum value of 12.69 μmol CO2 · m-2 · s-1 when PAR was about 1200 μmol · m-2 · s-1,and then Rp decreased with increasing PAR.The function relationship between Rp and PAR was constructed.The fitted result showed that the maximum value of Rp(Pp-max) was 13.42 μtmol CO2 · m-2 · s-1,and the light intensity corresponding to Pp-max was 1207.74 μmol · m-2 · s-1.The fitted values were extremely in agreement with the measured values (P ＞0.05).As air CO2 concentration (Ca) (0-1200 μmol · mol-1) increased,Rp of soybean leaves increased firstly and then decreased.It reached a maximum value of 9.97 μmol CO2 · m-2 · s-1 when Ca was about 600 μmol · mol-1.The function relationship between Rp and Ca was also constructed.The fitted result showed that the Pp-max was 10.21 μtmol CO2 · m-2 s-1,and the Ca corresponding to the Pp-max was 625.74 μmol · mol-1.The fitted values also accorded with the measured values (P ＞0.05).Thus,it can be concluded that the constructed function relationships between Rp and PAR and between Rp and Ca would provide a powerful means for the quantitative study of photorespiration of plant leaves.关键词
光呼吸/大豆/CO2浓度/光强Key words
photorespiration/soybean/CO2 concentration/light intensity引用本文复制引用
叶子飘,王怡娟,王令俐,康华靖..大豆叶片光呼吸对光强和CO2浓度的响应[J].生态学杂志,2017,36(9):2535-2541,7.基金项目
国家自然科学基金项目(31560069)、江西省自然科学基金项目(20142BAB20402)和温州市重点科技创新团队项目(C20150008)资助. （31560069）
