辣椒光合系统对重金属Cd^(2+)胁迫的响应

Response of Photosynthesis System of Capsicum annuum L. to Cd^(2+) Stress

该实验以保连1号和湘椒8号两个辣椒品种为试验材料,研究了不同浓度的Cd2+在不同处理时间下对两个辣椒品种的净光合速率(Pn)、细胞间隙CO2浓度(Ci)、气孔导度(Gs)、蒸腾速率(Tr)和叶绿素含量等光合作用指标的影响.结果表明,Cd2+胁迫严重影响辣椒光合系统各参数,同时降低了叶绿素的含量,且辣椒品种之间耐镉能力存在一定的差距,Cd2+对湘椒8号的影响比对保连1号的要小得多.

Under 0, 10, 50, 100, 150 mg/L Cd^2＋ stress condition, Pn, Ci, Gs, Tr, and chlorophyll content are compared between two pepper （ Capsicum annuum L. ） varieties-Baolian No. 1 and Xiangjiao No.8. The result shows that Pn, Ci, Gs, Tr and chlorophyll content of leaves all decrease with Cd^2＋ stress, and the influence of Cd^2＋ stress to Xiangjiao No.8 is not as much as that to Baolian No. 1.