Fe^(2+)对紫背浮萍生长和生理生化特性的影响  

Effects of Fe^(2+) on the Growth and Physio-chemical Characters of Spirodela polyrrhiza

作　　者：徐晓晖[1] 林海芳[2] 邹克琴[1] 

机构地区：[1]中国计量学院生命科学学院,浙江杭州310018 [2]中国计量学院现代科技学院,浙江杭州310018

出　　处：《北方园艺》2012年第11期15-18,共4页Northern Horticulture

基　　金：浙江省自然科学基金资助项目(Y507691)

摘　　要：通过水培试验研究了不同浓度Fe2+处理下对紫背浮萍生长、光合色素含量、Fv/Fm值、过氧化物酶(POD)活性和丙二醛(MDA)含量的影响。结果表明:Fe2+在0.2～10mg/L浓度范围内,紫萍的生长、Fv/Fm、可溶性蛋白和MDA含量没有受到明显影响,光合色素含量和POD活性有所升高,表现出较强的抗性;Fe2+浓度超过20mg/L时开始对紫萍构成胁迫,使紫萍的生长抑制,光合色素含量、Fv/Fm、可溶性蛋白含量、POD活性下降,MDA含量升高,产生明显的毒性效应。The effect of Fe2＋ on the growth,the content of photosynthetic pigment,Fv/Fm,the activity of peroxide（POD）,the content of MDA of Spirodela polyrrhiza were studied in a solution culture system.The results showed that when the concentration of Fe2＋ was from 0.2 mg/L to 10 mg/L,Fe2＋ had limited effect on the growth,Fv/Fm,the content of soluble protein and MDA of Spirodela polyrrhiza,but could increase the content of pigment and the activity of peroxide（POD）.When the concentration of Fe2＋ was more than 20 mg/L,the growth was inhibited,the content of pigment,Fv/Fm,the activity of peroxide（POD） was decreased,and the content of MDA was increased significantly.These showed that the apparent toxic effect of Fe2＋.

关 键 词：Fe2+ 紫背浮萍 生理生化特性 

分 类 号：Q945.3[生物学—植物学] S181[农业科学—农业基础科学]