瞬时CO_2浓度变化对杏属植物光合生理影响研究  

The Photosynthetic Characteristics of Fifteen Apricot Cultivars Under Instantaneous Change of CO_2 Concentration Conditions

作　　者：孙猛[1] 吕德国[2] 刘威生[1] 

机构地区：[1]辽宁省果树科学研究所,辽宁熊岳115009 [2]沈阳农业大学园艺学院,沈阳110161

出　　处：《中国农学通报》2014年第16期108-112,共5页Chinese Agricultural Science Bulletin

基　　金：公益性行业(农业)科研专项"杏和李产业技术研究与试验示范"(201003058)

摘　　要：为探讨CO2浓度瞬时变化对杏碳同化能力、水分利用能力的影响,进一步了解杏属植物在未来大气CO2浓度升高和全球变暖情况下的生长潜力和生态优势,利用Li-6400便携式光合测定仪对15个2年生杏品种进行瞬时CO2浓度倍降和倍升处理的光合参数测定。结果表明,瞬时CO2浓度变化显著影响杏属植物光合作用,在瞬时CO2浓度升高情况下,最大净光合速率(Amax)升高,呼吸速率(Rd)下降,光补偿点(LCP)降低,表光量子效率(AQY)提高,水分利用效率(WUE)显著增强,但光饱和点(LSP)变化不显著,不同品种Gs和Tr反应有一定差异。适当增加CO2浓度能提高杏属植物对弱光和水分的利用能力,促进光合作用,增加同化物积累,加速碳素循环。To study the effect of CO2 concentration on carbon assimilation and water use efficiency of apricots, and to learn more about potential and ecological advantages of apricots under elevated atmospheric CO2 and global warming, the author measured photosynthesis parameters of 15 2-year-old apricot varieties with a Li- 6400 portable gas analyzer under natural CO2 concentration, half CO2 concentration, doubled CO2 concentration and tripled CO2 concentration. The results showed that there was a significant change on photosynthesis of apricots under the instantaneous variable CO2 concentration conditions. While CO2 concentration was elevated, the maximum photosynthesis rate, apparent quantum yield and water use efficiency increased, dark respiration rate and light compensation point decreased, light saturation point increased non- significantly, and the response of stomatal conductance and transpiration rate had some differences. Under the appropriately elevated CO2 concentration conditions, lower light and water were made better use, photosynthesis was promoted, assimilates of leaves were increased and carbon cycle was accelerated.

关 键 词：杏 光合作用 瞬时CO2浓度变化 

分 类 号：S662.2[农业科学—果树学]