园艺学报 ›› 2005, Vol. 32 ›› Issue (02): 335-338.

• 研究报告 • 上一篇    下一篇

CO2 浓度升高对红掌光合速率与生长发育的影响

王精明1, 2;李永华1;黄胜琴1;刘丽娜1;叶庆生1   

  1. (1 华南师范大学生命科学学院, 广州510631; 2 惠州学院生物系, 惠州516015 )
  • 收稿日期:2004-03-16 修回日期:2004-09-27 出版日期:2005-04-25 发布日期:2005-04-25

Effects of Eleva ted CO2 Concentration on Photosynthetic Rate, Growth andDevelopment in Anthurium andraeanum Lind. Leaves

Wang Jingming1, 2;Li Yonghua2;Huang Shengqin2;Liu Lina2; Ye Qingsheng1   

  1. (1College of Life Sciences, South China Normal University, Guangzhou 510631, China; 2Department of Biology, Huizhou College, Huizhou 516015, China)
  • Received:2004-03-16 Revised:2004-09-27 Online:2005-04-25 Published:2005-04-25

摘要: 本试验以开顶式塑料薄膜温室为设施, 研究了高CO2 浓度对红掌叶片光合速率、植株生长、光合酶活性和花期的影响。结果表明: 处理90 d时, 对照组〔大气CO2 浓度( 360 ±30) μmol·mol- 1 〕红掌的株高、叶面积、株干样质量、株鲜样质量与处理前相比分别增加了16.4%、36.1%、101.2%和84.2% , 而高CO2 浓度组〔( 1 000 ±100 ) μmol·mol- 1 〕则分别增加了72.9%、65.6%、217.6%和199.1%。高CO2 浓度组的净光合速率比对照增加46.27%, 气孔导度下降, 促进了叶片中可溶性糖和淀粉积累, 叶绿素含量比对照下降, 而对Rubisco活性影响较小, 乙醇酸氧化酶活性则明显下降。高CO2 浓度处理50 d时, 开花率为25%, 处理90 d时已达到80%以上, 而在整个试验期间对照组未见开花。因此, 高浓度CO2 处理提高了红掌叶片的光合速率和碳水化合物的积累, 促进了营养生长, 提前了花期。

关键词: 红掌, 光合速率, 生长发育

Abstract: The effects of elevation of CO2 on photosynthetic characteristics, growth rate and flowering of Anthurium andraeanum Lind. were studied in open-top plastic chambers. The results showed that plant grown under ambient CO2 〔(360 ±30) μmol·mol- 1 〕at 90 d after treatment, the plant height , leaf area, fresh
and drymass have increased by 16.4% , 36.1% , 101.2% and 84.2% respectively than that 0 d after treatment. However, plant grown under elevated CO2 condition 〔(1 000 ±100) μmol·mol- 1 〕at that period, their physiological characteristics increased significantly by 72.9% , 65.6% , 217.6% and 199.1% respectively. Comparing with the ambient CO2 , elevated CO2 caused a marked rise in net photosynthetic rate (46.27% ) and more soluble sugar and starch accumulation in leaves, but significantly reduced their stomata conductance and chlorophyll content. In addition, elevated CO2 had little effect on Rubisco activity, and glycolate oxidase activity apparently decreased in leaves. There area great difference in flowering between ambient
and elevated CO2 condition. No flowering occurred in the former, but the flowering percentage of the latter were 25% at 50 d and 80% at 90 d. It was considered that increase in CO2 concentration in a certain extent might be most beneficial for increasing photosynthetic rate and carbohydrate accumulation, and therefore, the vegetative growth and flowering were eventually promoted.

Key words: Anthurium andraeanum Lind., Net photosynthetic rate, Growth and development