CO_2浓度升高对凤梨叶片生长和光合特性的影响  

Effects of Elevated CO_2 Concentration on the Growth and Photosynthetic Characteristics in Guzmania 'Danis'

作　　者：王精明[1,2] 李永华[3] 黄胜琴[3] 叶庆生[3] 

机构地区：[1]惠州学院生物系 [2]华南师范大学生命科学学院,广东广州510631 [3]华南师范大学生命科学学院

出　　处：《热带亚热带植物学报》2004年第6期511-514,共4页Journal of Tropical and Subtropical Botany

基　　金：广东省自然科学基金团队项目(003062);广东省自然科学基金重点项目(04105806);广东省自然科学基金项目(011461)资助

摘　　要：研究了CO2浓度升高对开顶式气室中凤梨叶片的生长与光合生理的影响。结果表明:高CO2浓度(1000±100μmolmol-1)下生长的凤梨植株的株高、叶面积、鲜重和干重均高于对照(360±30μmolmol-1),处理90d时分别为对照的120.19%、119.22%、177.91%和161.04%;凤梨叶片的净光合速率也增加了136%-259%,且促进了叶片中可溶性糖和淀粉的积累,但叶绿素含量则下降了33.91%。高CO2浓度处理的凤梨叶片中RuBP羧化酶活性没有明显变化,乙醇酸氧化酶活性则明显下降。Studies on the growth and photosynthetic characteristics in Guzmania 'Danis' were conducted in plastic greenhouse with top covered by shading net under elevated CO2 (1 000±100 μmol mol-1) and ambient CO2 (360±30 μmol mol-1) conditions. The results showed that the plant height, leaf area, fresh and dry weightsof plants under elevated CO2 were 120.19%, 119.22%, 177.91% and 161.04% of those under ambient CO2, respec-tively, as determined after 90 days of experiment. Under elevated CO2 condition, the net photosynthetic rateincreased to 136%-259% and chlorophyll content decreased to 33.91% in comparison with those under ambient CO2 during the experiments. Elevated CO2 stimulated the accumulation of soluble sugar and starch, but declined the activity of glycolate oxidase in leaves, however, the activity of RuBPCase increased only slightly.

关 键 词：风梨 CO2浓度升高 生长 净光合速率 

分 类 号：S682.3[农业科学—观赏园艺]