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《狼尾草典型生理生化特征对阿特拉津胁迫的响应.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、2015,34(11):2083—2088农业环境科学学报2015年11月——————————————————————————————————————————●JoHrnalofAgro-EnvironmentScience●卜————————————————————————————————————————一狼尾草典型生理生化特征对阿特拉津胁迫的响应马兵兵,姜昭,叶思源,刘晓雪,马昱亨,张颖‘(东北农业大学资源与环境学院,哈尔滨150030)摘要:通过盆栽试验考察狼尾草生长(生物量及根冠比)及典型生理指
2、标(叶绿素、丙二醛及脯氨酸含量)对不同浓度阿特拉津污染胁迫的响应规律。结果显示,高浓度阿特拉津胁迫下狼尾草生物量(≥100mg·kg。)、根冠比(≥200mg·kg一)两类生长指标与对照处理相比达到显著性抑制水平。阿特拉津胁迫(≤200mg·kg-1)对狼尾草叶片中叶绿素含量的影响较小,各污染处理样品叶绿素含量与对照组的差异不显著;阿特拉津污染胁迫水平达到100mg·kg。1时,狼尾草叶片中脯氨酸含量达到最大值(39.38斗g·kg-1),同时丙二醛含量与对照处理相比呈现显著升高的趋势。上述结果表明:只
3、有在较高浓度阿特拉津(≥100mg·kg。)胁迫水平条件下,狼尾草典型生长及生理指标才逐渐受到极显著影响,从植物生长与生理角度揭示了狼尾草对阿特拉津具有较强的耐受能力。关键词:狼尾草;阿特拉津;胁迫;生物量;丙二醛;脯氨酸;响应中图分类号:X53文献标志码:A文章编号:1672—2043(2015)11-2083—06doi:10.11654/jaes.2015.11.007TypicalPhysiologicalandBiochemicalCharacteristicsofPennisetumamer
4、icanumL.(CV.K.Schum)UnderAtrazineStressesMABing—bing,JIANGZhao,YESi—yuan,LIUXiao—xue,MAYu-heng,ZHANGYing+(SchoolofResource&Environment,NortheastAgriculturMUniversity,Harbin150030,China)Abstract:Atrazineisoneofthemostwidelyusedherbicidesforcontrollingbroa
5、dleafweeds.Hence,increasedusesoftheherbicidehavere-suitedinseveresoilpollution.Inordertoeva]uatetheimpactofatrazinestressesonPennisetum删抛r/co/gl/,mL.(CV.K.Schum),aplantusedforremediatingatrazinecontaminatedsoil,apotexperimentwasconductedtoinvestigatether
6、esponsesoftypicalphysiologicalandbiochemicalcharacteristicsoftheplanttodifferentconcentrationsofatrazine.Comparedtothecontroltreatment,atrazineat100mg·kg一1and200mg·kg—significantlyreducedplantbiomassandroot/shootratio,respectively,showingthatthesensitivi
7、tyofrootstoatrazinestresswasgreaterthanthatoftheshoots.However,atrazineshowedslightinhibitionofchlorophyllcontentoftheplant.At100mg‘kg—atrazine,theprolinecontentinleavesreachedthemaximum(39.38Ixg·g。FW),andMDAcontentalsosignificantlyincreased,comparedtoth
8、econ—tr01.Theseresultsindicatedthatthegrowth,physiologicalandbiochemicalindicatorsofP.u/her/c(//gl/,mL.ev.K.Schum)couldbesignifi—cantlyaffectedbyatrazineathighlevels(≥100mg。kg“).r11lisresearchshedlightontheapplicationofP.O
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