镉胁迫对银条生物量及光合特性的影响  

Effects of Cadmium Stress on Biomass and Photosynthetic Characteristics of Stachys floridana

作　　者：刘会超[1] 刘孟刚[1] 姚连芳[1] 贾文庆[1] 

机构地区：[1]河南科技学院园林学院,河南新乡453003

出　　处：《华北农学报》2010年第4期162-165,共4页Acta Agriculturae Boreali-Sinica

基　　金：河南省创新人才工程项目(2005126-49);河南科技学院博士基金资助项目(HK05-1226)

摘　　要：通过盆栽试验,研究了CdCl2胁迫对银条叶片光合特性的影响。结果表明,随着CdCl2浓度的增加,银条生物量下降明显,叶片光合速率(Pn)、蒸腾速率(Tr)和气孔导度(Gs)降低,在镉浓度为250mg/L时分别为对照的25.00%,35.52%,54.02%;水分利用效率(WUE)呈现先升高再降低的变化趋势,而胞间CO2浓度(Ci)只在高浓度(≥200mg/L)时才逐步升高,但增幅相对较小,在2.40%～9.15%之间。With pot cultivation,the effects of cadmium stress on the leaf photosynthetic characteristics of Stachys floridana were studied. The results showed that with the increasing of cadmium concentration,the biomass of Stachys floridana decreased significantly . Cadmium reduced the photosynthetic rate（Pn） ,transpiration rate（Tr） and stomatal conductance（ Gs） to 25. 00% ,35. 52% ,54. 02% respectively at a concentration of 250 mg/L. The water use efficiency （WUE） was firstly increased,and then decreased. The intercellular CO2 concentration（Ci） was gradually escalate with the higher cadmium concentration（greater than or equal to 200 mg/L） ,but the increasing of intercellular CO2 concentration （Ci） was relatively less and the increase amplitude was 2. 40%-9. 15% .

关 键 词：银条 镉胁迫 光合特性 

分 类 号：S63[农业科学—蔬菜学]