满江红对Ce^(3+)胁迫的生理生化应答反应研究  

Study on the Physiological and Biochemical Responses of Azolla imbricata(Roxb.)Nakai to Ce^(3+) Stress

作　　者：王学[1] 

机构地区：[1]山东理工大学生命科学学院,山东淄博255049

出　　处：《安徽农业科学》2010年第2期704-705,共2页Journal of Anhui Agricultural Sciences

基　　金：国家自然科学基金(30900071);山东理工大学博士科研启动经费(4041-406027)

摘　　要：[目的]探讨了满江红对Ce3+胁迫的生理生化应答反应机制。[方法]以水生蕨类植物满江红[Azollaimbricata(Roxb.)Nakai]为试验材料,研究了其叶绿素含量、光合放氧速率和抗氧化酶(SOD、CAT、POD)活性随Ce3+浓度的变化情况。[结果]随着Ce3+浓度的升高,SOD、CAT、POD活性均出现不同程度的应激性升高,而后降低;叶绿素含量、光合放氧速率呈现出先升后降的变化趋势。[结论]在低浓度Ce3+处理下,满江红通过增强其抗氧化能力,提高了其对Ce3+胁迫的抵抗力;但随着Ce3+浓度的加大,满江红的抗氧化能力逐渐减弱,表现出抑制效应。[ Objective ] The purpose was to discuss the mechanism of physiological and and biochemical responses of Azolla imbricata （ Roxb. ） Nakai to Ce^3＋ Stress. [ Method ] With Azolla imbricata （Roxh.）Nakai as tested materials,the toxic effect of different gradient concentrations of Ce^3＋ stress on chlorophyll contents,photosythentic O2 evolution rate,and antioxidase system （SOD,CAT,POD） was studied. [ Result ] The results showed that Ce^3＋ stimulated the activities of SOD,CAT,POD at lower concentration,and decreased drastically at the higher concentration. With increase in the stress,chlorophyll contents and photosythentic O2 evolution rate took on a trend of rise first and fall later. [ Conclusion ] At lower concentration,Ce^3＋ enhanced the resistance of Azolla imbricata （Roxb.）Nakai to Ce^3＋ stress by increasing the activities of antioxidant enzymes. However,with the increase of Ce^3＋ concentration ,antioxidant enzymes activities declined gradually.

关 键 词：满江红 Ce3+ 生理生化 

分 类 号：Q945[生物学—植物学]