DINGJia-hong,XUEZheng-lian,YANGChao-ying.EffectofSalicylicAcidonMembraneLipidPeroxidationinRiceSeedlingsunderCopperStress[J].HEILONGJIANG AGRICULTURAL SCIENCES,2013,(01):14-18.
水杨酸对铜胁迫下水稻幼苗膜脂过氧化作用的影响
- Title:
- EffectofSalicylicAcidonMembraneLipidPeroxidationinRiceSeedlingsunderCopperStress
- 文章编号:
- 1002-2767（2013）01-0014-05
- Keywords:
- rice; salicylicacid; copperstress; membranelipidperoxidation
- 分类号:
- X503.23
- 文献标志码:
- A
- 摘要:
- 为了探讨水杨酸在缓解重金属胁迫中的作用，以水稻为材料，通过水培试验，研究了在重金属铜处理下水杨酸对水稻幼苗膜脂过氧化作用的影响。结果表明：随着铜浓度的提高，水稻幼苗叶片的膜完整性被破坏，电导率增加，最大为对照组的2.62倍，同时MDA含量显著提高，表明膜脂过氧化作用加剧。而对铜处理的水稻幼苗滴加水杨酸时，水稻叶片的电导率、MDA均比单独铜处理有所下降，说明水杨酸在一定程度上保护了膜系统的完整性，降低了水稻幼苗的膜脂过氧化作用。同时水杨酸还提高了铜处理水稻幼苗的POD、CAT和SOD的活性，强化了植物体内保护酶的功能，增强了水稻幼苗对抗重金属毒害的能力
- Abstract:
- InordertoinvestigatetheeffectofSAinrelievingheavymetalstress,theeffectofsalicylicacidonmembranelipidperoxidationinriceseedlingsleafundercopperstresswerestudiedbywatercultureexperimentwithriceasmaterial.TheresultsshowedthatwiththeelevationofCu2+concentration,themembraneintegrityofriceseedlingsleafwasdestroyedandtheelectricconductivityincreased,themaximumwas2.62timesofthecontrolgroup,meanwhiletheMDAcontentwasraisedsignificantly,whichindicatedthatthemembranelipidperoxidationwasintensified.Butwhensalicylicacidwasdropwisedduringthewaterculture,theelectricconductivityandMDAcontentwerebothdecreased,whichillustratedthesalicylicacidcouldprotecttheintegrityofmembranesystemincertaindegreeandreleasethemembranelipidperoxidationofriceseedlingsleaf.Atthesametime,salicylicacidalsoincreasedPOD,CATandSODactivityofriceseedlingleaf,enrichedprotectiveenzymeinplantandreinforcedtheabilityofriceseedlingoppositiontoheavymetalpoison.
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备注/Memo
收稿日期：2012-09-07
基金项目：安徽省高校省级自然科学研究资助项目（KJ2010B286）；省级自然科学研究资助项目（KJ2009B089Z）；安徽工程大学校青年基金资助项目（2005yq018）
第一作者简介：丁佳红(1977-)，女，安徽省宿州市人，硕士，讲师，从事环境污染生态学方面的研究。E-mail:djiahong@163.com。