Effect of overnight temperature on leaf photosynthesis in seedlings of Swietenia macrophylla King

编号 zgly0000305627

文献类型 期刊论文

文献题名 Effect of overnight temperature on leaf photosynthesis in seedlings of Swietenia macrophylla King

学科分类 220.1050;树木生理学

作者 ZHANGCheng-Jun  CarlosHenriqueB.deA.Prado  ZUYuan-Gang  GUOJia-Qiu  CarlosCesarRonquim  LeonnardoLopesFerreira 

作者单位 KeyLaboratoryofForestPlantEcology 

母体文献 Journal of Forestry Research（林业研究：英文版） 

年卷期 2003,14(2)

页码 130-134

年份 2003 

分类号 Q945.11 

关键词 大叶桃花心木  温度  幼苗  叶片  光合作用  表观量子产量  羧化效率  二氧化碳浓度 

文摘内容 After exposure of one-year old seedlings of Swietenia macrophylla to an overnight temperature (13 ℃, 19 ℃, 25 ℃,31 ℃ or 35 ℃), the leaf net photosynthetic rate (Pn) was researched through measuring photosynthetic light-response curves at360μmol·mol^-1 CO2, and photosynthetic CO2-response curves at light-saturated intensity (1500 μmol·mol^-1·m^-2·s^-1). The optimal temperature for photosynthesis measured at 360μmol·mol^-1 CO2 was from 25 ℃ to 31 ℃, but which was from 31℃ to 35 ℃ at saturating CO2 concentration. At temperature of below 25 ℃, the decline in Pn was mainly due to the drop in carboxylation effi-cfency (Ce), while as temperature was over 31 ℃, the reduction in Pn resulted from both decrease in Ce and increase in leaf respiration. The CO2-induced stimulation of photosynthesis was strongly inhibited at temperatures below 13 ℃. The results showed that, the leaf photosynthesis of tropical evergreen plants should not be accelerated at low temperature in winter season with elevated CO2 concentration in the future。