大气CO_2浓度升高对植物某些生理过程影响的研究进展  

Research Progress in Effects of Increased Atmospheric CO_2 Concentration on Certain Physiological Process of Plants

作　　者：彭晓邦[1] 张硕新[1] 

机构地区：[1]西北农林科技大学林学院,陕西杨陵712100

出　　处：《西北林学院学报》2006年第1期68-71,共4页Journal of Northwest Forestry University

基　　金：国家林业局"十五"重点项目"陕西秦岭火地塘森林景观特征及生态功能研究"(2001-04)

摘　　要：生长在高浓度CO2环境下的植物,其生理生态及形态等方面将会发生相应的变化。表现在光合速率提高,呼吸作用受抑制,气孔密度减小,水分利用效率增加。这些生物要素和生态过程的变化会引起群落内植物间对资源原有的竞争关系发生变化,对资源竞争的格局发生变化,最终将会导致森林结构和功能的改变。不同光合途径(C3、C4及CAM)及不同植被类型的植物随CO2浓度发生的上述指标的变化在长期反应与短期反应方面具有很大差异。Plants growing in high （CO2） levels may change with their physiological and morphological features. Photosynthetic rate may be enhanced while respiration inhibited. Stomatal density may become lower while water-use efficiency （WUE） increases with （CO2） increasing. The change of biological foctors and ecological process could influeace the resources competition among plants within community. The change in competition situation with in community would finally result in alterations in forest structure and function. Plants with different photosynthesis paths （C3, C4 and CAM） and different vegetation types have different response to the elected （CO2）. Long-term and short-term responses of the same plants may differ on the other hand.

关 键 词：光合作用 呼吸作用 水分利用效率 群落结构与功能 

分 类 号：S718.43[农业科学—林学]