KCl和NaCl对毕氏海蓬子生长和几种抗氧化酶活性的影响.pdfVIP

植物生理学通讯第44卷第l期，2008年2月 5l KCI和NaCI对毕氏海蓬子生长和几种抗氧化酶活性的影响 周峰’，周泉澄，华春，陈全战 南京晓庄学院生命科学系，南京211171 mm01．L‘1 提要：50～200 NaCI显著促进海蓬子生长和抗氧化酶【超氧化物歧化酶(SOD)、过氧化物酶(POD)和过氧化氢酶 (CAT)】活性，与NaCl浓度相同的KCI明显抑制海蓬子生长和此3种酶的活性，KCl下的超氧阴离-t-(oi)和丙二醛(MDA) 含量增加程度则明显高于同浓度的NaCI处理。据此认为，KCl伤害海蓬子的原因之一是抗氧化酶活性下降，不能及时清 除活性氧，以致活性氧和MDA积累，引起质膜伤害，海蓬子生长受抑和生长量下降。 关键词：毕氏海蓬子；KCl处理；NaCI处理；生长；抗氧化酶 Activi— EffectsofKCIandNaCIonGrowthandSeveralAntioxidative Enzyme tiesof Torr． Salicornia b远elovii ‘ ZHOU Quan—Cheng，HUAChun，CHENQuart—Zhan Feng’，ZHOU DepartmentofL玳Science,NanjingXiaozhuangCollege．Nanjing211171。China SalicorniawastreatedwithdifferentconcentrationsofKClandNaCl．The Abstract：Halophytebigelovii resultsdemonstratedthat5m-200mm01．L．1NaCl enhancedthe significantly growth，strperoxidedismutase(SOD)， the was peroxidase(POD)andcatalase(CAT)activitiesofbigelovii．Whilegrowthofbigeloviimarkedly the of and decreasedwhenthe weretreatedwith100一200mm01．LoKCLKClledto decreaseSOD．POD plants CATactivities．The anion(C巧)and wereincreased superoxide malondialdehyde(MDA)contentsmarkedly under100_200mm01．L—KCltreatment withthesameNaClconcentration．Theresults contrasting suggested that for wasthat山e ofantioxidantcouldnot thereactive onereasonKCl toxicity system enzymes scavenge in causedtheaccumulationofreactive andt11e of oxygenspeciestime．which