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时间:2018-04-15
《干旱胁迫对_紫叶_狼尾草生长发育及生理特性的影响》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、福建农业学报29(8):752~756,2014文章编号:1008-0384(2014)08-752-05FujianJournalofAgriculturalSciences张苏州.干旱胁迫对‘紫叶’狼尾草生长发育及生理特性的影响[J].福建农业学报,2014,29(8):752-756.ZHANGS-Z.EffectofDroughtStressonGrowingDevelopmentandPhysiologicalCharacteristicsofPennisetumsetaceum[J].FujianJournalofAgriculturalSciences,2014,29
2、(8):752-756.干旱胁迫对‘紫叶’狼尾草生长发育及生理特性的影响张苏州(深圳市中国科学院仙湖植物园,广东深圳518004)摘要:以观赏草‘紫叶’狼尾草Pennisetumsetaceum‘Rubrum’为试验材料,研究不同程度干旱胁迫对其生长发育及叶绿素含量、脯氨酸含量、丙二醛含量、根系活力的影响。结果表明:5%聚乙二醇处理与CK之间,除脯氨酸含量差异显著外,其他生长发育及生理指标差异不显著;10%、20%聚乙二醇处理,紫叶狼尾草株高、分蘖数、根长、地上部鲜重和干重、地下部鲜重和干重以及根系活力较5%聚乙二醇处理、CK明显降低,叶绿素含量显著下降,而脯氨酸、丙二醛含量显著增
3、加,但是紫叶狼尾草的生长发育尚未出现枯萎状态。综合而言,紫叶狼尾草具有很强的抗旱性,能承受一定程度的干旱胁迫。关键词:‘紫叶’狼尾草;干旱胁迫;生理指标中图分类号:S688.9文献标识码:AEffectofDroughtStressonGrowingDevelopmentandPhysiologicalCharacteristicsofPennisetumsetaceumZHANGSu-zhou(FairylakeBotanicalGarden,Shenzhen&ChineseAcademyofScience,Shenzhen,Guangdong518004,China)Abstr
4、act:Theeffectsofdifferentdegreesdroughtstressongrowingdevelopment,chlorophyllcontent,prolinecontent,MDAcontentandrootactivitywereresearchedbyapplicationornamentalgrassPennisetumsetaceum'Rubrum'asthetestmaterial.Theresultsshowedthattherewassignificantdifferenceinprolinecontentbetweentreatment5%
5、polyethyleneglycol(PEG)andCK,andtherewerenodifferenceinothergrowingdevelopmentandphysiologicalindexes.Theplantheight,tiller,rootlength,abovegroundfreshanddrybiomass,undergroundfreshanddrybiomass,rootactivityofPennisetumsetaceum'Rubrum'bytreatmentof10%and20%PEGdecreasedsignificantlythanthatbytr
6、eatmentof5%PEGandCK.Atthesametimethechlorophyllcontentof10%and20%PEGreducedsignificantly,butthecontentofprolineandMDAcontentincreasedsignificantly.Pennisetumsetaceum'Rubrum'canstillgrowanddevelopnormally,whichwasnotwither.Insummarize,Pennisetumsetaceum'Rubrum'hasstrongdroughtresistance,whichca
7、nenduredroughtstresstosomedegree.Keywords:Pennisetumsetaceum‘Rubrum’;droughtstress;physiologicalcharacteristics‘紫叶’狼尾草Pennisetumsetaceum旱,且抗旱能力较强;抗病虫害能力强,几乎未见‘Rubrum’是狼尾草属绒毛狼尾草P.setaceum的报道有病虫害发生。‘紫叶’狼尾草在干旱或降水园艺栽培变种。株型柔美;叶片全年紫红色,极具不均衡地区
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