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时间:2020-03-25
《氟污染对玉米幼苗生长及生理特性的影响.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、农业环境科学学报2010,29(2):216-222JournalofAgro-EnvironmentScience氟污染对玉米幼苗生长及生理特性的影响杜海荣1,杨田甜2,吕荣芳2,吴林园1,王荣富1(1,安徽农业大学生命科学学院,合肥236000;2.扬州大学生物科学与技术学院,江苏扬州225009)摘要:为探讨氟污染对农作物的影响,以玉米为供试材料,采用砂基培养的方法,研究了不同浓度的氟(F)对玉米幼苗形态、生物量、光合参数、叶绿素含量、抗氧化酶活力以及丙二醛含量的影响。结果表明,与对照相比,低浓度F(≤O.25mmol·L--)对玉米幼苗生长无明显抑制
2、现象;随着溶液中F浓度的增加,玉米幼苗生长显著受到抑制,叶长、株高生长变慢,叶面积减小;根系和地上部干物质积累下降;叶片中叶绿索合成受阻,光合速率降低;同时丙二醛(MDA)含量增加;过氧化物酶(POD)活性明显升高。而超氧化物歧化酶(SOD)和过氧化氢酶(CAT)活性均表现出一定的下降趋势。说明氟的存在不利于植物的正常生长,研究结果还为进一步揭示氟污染机理以及氟污染的综合治理提供了理论依据。关键词:氟污染;玉米幼苗;生长;生理特性中图分类号:X503.231文献标志码:A文章编号:1672—2043(2010)02-0216-07EffectsofFluor
3、idePollutionontheGrowthandPhysiologicalCharacteristicsofMaizeSeedlingsDUHai-mn91,YANGTian-tian2,LVRong-fan92,WULin-yuanl,WANGRong-ful(1.CollegeofLifeScience,AnhuiAgriculturalUniversity,Hefei236000,China;2.CollegeofTechnologyandBiologyScience。YangzhouUniversity,Yangzhou225009,China)
4、Abstract:Fluoride(F),acommonphytotoxicair,waterandsoilpollutantiscommonlyreleasedtotheenvironmentbyanumberofindustrialprocesses.ThemaizeWasusedasanexperimentalmaterialandtIIeeffectsofdifferentconcentrationsoffluoride(0,0.25,0.5,5,10mmol·L-1)onthegrowthandphysiologicalcharacteristic
5、sofmaizeseedlingswerestudiedusingsandcultivation,theplantmodality,biomass,parametersofphotosynthesis,chlorophyllcontents,activitiesofthreeanti-oxidativeenzymesandmalondialdehyde(MDA)contentswerealldetermined.Theresultswereasfollows:contrastingtOthecontrolofmaizeseedlingswithoutF,wh
6、entheFconcentrationWaslowerthan0.25mmol·L一.thegrowthofseedlingsWasstimulated.WiththeincreaseofFconcentration,theseedlinggrowthWasobviouslyrestrained,thatWas,theleaflengthandplantheishtsloweddownmarkedly,theleafareareduced,thereot/shootdryweightaccumulationdecreasedandthechlorophyll
7、synthesisinleaveswaginhibitedandtllephotosynthesisratedecreasedaswell.Ontheotherhand.theMDAcontentandtheperoxidase(POD)activitiesincreasedwhilesupemxidedismutase(SOD)andca“llase(CAT)activitiesdecreasedunderhigherFconcentration.There—suhsindicatedthatthehighFconcentrafionW88notcondu
8、civetothegrowthofmaizeseed
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