[1]陈苏雅.稀土铈(Ce~(3+))、钕(Nd~(3+))对水花生叶片Cu~(2+)毒害效应的影响[J].南京师大学报(自然科学版),2009,32(01):99-104.
　Chen Suya.Toxic Effect of Cu2+ on Alternanthera philoxeroides Alleviated by Different Concentration of Ce3+ and Nd3+[J].Journal of Nanjing Normal University(Natural Science Edition),2009,32(01):99-104.
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稀土铈(Ce~(3+))、钕(Nd~(3+))对水花生叶片Cu~(2+)毒害效应的影响()
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《南京师大学报（自然科学版）》[ISSN:1001-4616/CN:32-1239/N]

卷:
第32卷
期数:
2009年01期
页码:
99-104
栏目:
生物学
出版日期:
2009-03-30

文章信息/Info

Title:
Toxic Effect of Cu2+ on Alternanthera philoxeroides Alleviated by Different Concentration of Ce3+ and Nd3+
作者:
陈苏雅;
南京师范大学科技处, 江苏南京210046
Author(s):
Chen Suya
Department of Science and Technology,Nanjing Normal University,Nanjing 210046,China
关键词:
C e 3+ ;  Nd 3+ ;  Cu 2+ ;  水花生;  毒害;  缓解
Keywords:
C e 3+ ;  Nd 3+ ;  Cu 2+ ;  Alternanthera ph ilox ero ides (M art. ) G riseb. ;  tox ic effect;  relieve
分类号:
X173
摘要:
研究了不同浓度Ce 3+ 、Nd 3+对水花生(Alternanthera philoxeroides(Mart.)Griseb.)叶片Cu 2 +毒害的影响.结果表明,在Cu 2+毒害下,水花生的叶绿素和可溶性蛋白含量下降,保护酶系统(POD、SOD、CAT)活性降低,O2.-产生速率和膜脂过氧化产物MDA含量上升,H2O2含量降低,一定浓度(2.5～7.5mg/L)的Ce 3+、Nd 3+处理,都能不同程度地缓解这些现象.而更高浓度的Ce 3+、Nd 3+处理的缓解作用不断减弱,甚至加重Cu2+毒害.相比之下,单一Ce3的作用效果优于单一Nd3+ . 总的看来, C e 3+ 、Nd 3+ 的最适浓度为5~ 715 mg /L. Ce 3+ 、Nd 3+ 缓解重金
属毒害的作用可能与调节蛋白质的表达及活性氧代谢有关.
Abstract:
Alternanthera ph ilox eroides were cultiv ated in so lu tion o f 2m g /L Cu 2+ and different concentration of Ce 3+ and Nd 3+ for 7 days to inv estig ate the action of rare earths on the tox ic e ffect of heavy m eta .l Resu lts show that, under the low concentration of Ce3+ and Nd3+ , the conten t of chlorophy l,l so lub le prote in and H2O2, the activ ity o f pro tective enzym es ( SOD, POD, CAT ) are higher than tha t o f single Cu treatm ent, the accum ulation o fMDA and the O-#2 generating ra te are less com pa red w ith Cu po ison. H ow ever, w ith h igher concentrations o f Ce 3+ and Nd 3+ , the re liev ing effec t is ge tting weaker and w eaker, even aggravates the tox ic effect. Gene ra lly, the optimum concentration o f Ce 3+ and Nd 3+ is 5~ 715 m g /L forA lternanthera ph ilox eroides, and C e 3+ is better than Nd 3+ . The expression o f pro te in and m etabo lism o f ac tive oxyg en are responsib le for the reliv ing effect m entioned above.

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备注/Memo

备注/Memo:
通讯联系人: 陈苏雅, 硕士, 研究方向: 科技管理及重金属毒害. E-m ail: suyabeckh am@ yahoo. com. cn
更新日期/Last Update: 2013-04-23