Fe^(2+)对水稻苗期根系的影响及保护酶POD活性变化  

Peroxidase Effects Rice in Iron Poisoning

作　　者：龙应霞[1] 刘荣鹏[1] 刘洋[1] 

机构地区：[1]黔南民族师范学院生命科学系,贵州都匀558000

出　　处：《黔南民族师范学院学报》2011年第3期55-59,共5页Journal of Qiannan Normal University for Nationalities

摘　　要：不同Fe2+浓度胁迫对水稻幼苗期根的毒害程度不同,测定不同浓度下水稻幼苗期根系的POD活性,从而得出POD在水稻亚铁毒害中的作用。结果表明:外源Fe2+浓度高于200 mg/L时,植株体内过多游离Fe2+存在会诱发多种自由基产生,造成氧化胁迫,损伤蛋白质,包括POD等酶类。The different concentrations Fe^2＋stress on the root of rice seedling stage at different levels of poison and determine the activities of POD of the rice seedling stage root at different concentrations.Thus draws the poison to rice POD of Ferrous ions.The results show that： When exogenous Fe2＋concentrations is higher than 200 mg / L,plants will have too much free Fe2＋ which induced a variety of free radicals.And they cause oxidative stress,damage proteins,including enzymes such as POD.

关 键 词：水稻 亚铁离子 毒害 过氧化物酶 

分 类 号：Q945[生物学—植物学]