亚铁对杂交水稻幼苗生长和部分生理生化特性的影响  

Effects of EDTA-Fe^(2+) on Growth and Physio-chemical Characteristic of Hybrid Rice Seedling

作　　者：王贵民[1] 陈国祥[1] 杨艳华[1] 刘少华[1] 邵志广[2] 

机构地区：[1]南京师范大学生命科学学院,南京210097 [2]江苏省丹阳师范学校,丹阳212300

出　　处：《南京师大学报（自然科学版）》2003年第2期56-60,共5页Journal of Nanjing Normal University(Natural Science Edition)

基　　金：江苏省高校自然科学研究计划项目(02KJB180006);江苏省高校资源生物技术重点实验室开放课题(KJS01036).

摘　　要：　通过溶液培养研究不同浓度的螯合态亚铁(EDTA Fe2+)胁迫对水稻幼苗的生长、光合速率、丙二醛和超氧阴离子的含量及抗氧化酶活性的影响.结果表明:高浓度螯合态亚铁(EDTA Fe2+)胁迫明显抑制水稻地上部分和根系的生长,水稻叶片MDA和O 2的含量增高、光合速率下降.CAT,SOD在低浓度的条件下活性升高,高浓度条件下活性下降,在水稻抗铁毒害中起到一定保护作用;而POD在致死浓度条件下仍具较高的活性,在水稻抗铁毒害中起到主要保护作用.A solution culture experiment was conducted to study the effects of different concentrations of EDTAFe2+on the growth,photosynthetic rate,concentrion of MDA O2,activities of SOD?CAT and POD in the hybrid rice seedling leaves. The results showed that higher EDTAFe2+concentrations obviously inhibited the growth of shoot and root;And the contents of MDA and O2 were higher than the control. Under lower EDTAFe2+concentrations stress,the leaf photosynthetic rate and the activities of protective enzymes were increased under higher EDTAFe2+stress,however,the photosynthetic rate decreased. Higher EDTAFe2+stresses affected the activity of SOD and CAT more than POD. Under lethal EDTAFe2+concentration,The POD kept higher activity.It indicated that POD acted a mostly important role in the detoxification of EDTAFe2+ stress.

关 键 词：杂交水 稻幼苗生长 生理生化特性 螯合态亚铁 光合速率 丙二醛 超氧阴离子 抗氧化酶 抗铁毒害 

分 类 号：S511[农业科学—作物学] Q945.78[生物学—植物学]