【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90d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〔(1000±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50d时,开花率为25%,处理90d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。更多还原

【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 dry mass 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.更多还原