植物光合作用对大气CO2浓度升高的反应

近年来大气中ＣＯ２浓度急剧增加使人们重新对研究ＣＯ２浓度升高对植物光合作用影响感兴趣。预计在未来的１００ａ中，大气ＣＯ２浓度还将不断增长并达到当今的２倍。ＣＯ２排放量的增加不仅加剧了地球上的温室效应，也将改变全球生态系统中碳的平衡。离浓度ＣＯ２对植物光剑作用的影响表现为短期和长期效应。短时间地供给高浓度ＣＯ２促进阿 光合作用，而长时间生长在高浓度ＣＯ２下抒使某些植物光合能力下降，出现了光合适应现象

RESPONSE OF PHOTOSYNTHESIS TO ELEVATED ATMOSPHERIC CO2

The substantial role of atmospheric CO 2 for photosynthesis had been admitted during the early nineteenth century.The rapid increase in atmospheric CO 2 concentration raises the interest again in photosynthetic response to CO 2 concentrations.Plant response to elevated CO 2 according to species,development stage and interaction of other factors,such as temperature,light,water and soil nutrient availability.Short term(minutes to days)exposure to elevated CO 2 often stimulates photosynthetic rate while photosynthetic acclimation may occur under long term(months to seasons)exposure.Mechanism of photosynthetic acclimation is not clear now.Feedback inhibition by end product and resources reallocation are proposed.The interacted effects of CO 2 elevation and other environmental factors make it more feasible.In this review,we will discuss how photosynthesis of plant response to elevated CO 2 and the interaction of other factors such as temperature with elevated CO 2 on photosynthetic acclimation.