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时间:2020-04-19
《酚酸对烟苗根系生长及叶片光合特性的影响.pdf》由会员上传分享,免费在线阅读,更多相关内容在应用文档-天天文库。
1、l4广东农业科学2014年第2期酚酸对烟苗根系生长及叶片光合特性的影响王茂胜,李明。,杨秀祥,汪汉成!,邱忠智,蒋选利(1.贵州大学农学院,贵州贵阳550025:2.贵州省烟草科学研究院/烟草行业烟草分子遗传重点实验室,贵州贵阳550081:3.中国烟草公司贵州省公司,贵』I'1贵阳550004;4.贵州省兴义市烟草公司,贵州兴义562400)摘要:为了解酚酸类他感物质对烟苗生长发育的影响,研究了苯甲酸、对羟基苯甲酸和水杨酸对烟苗根系发育、气体交换特征、叶绿素荧光参数及叶绿素含量的影响。结果表明,3种酚酸随着浓度的增加,烟苗叶片叶绿素含量(SPAD值)均呈先
2、增加后降低趋势;3种酚酸能够显著抑制烟苗根系发育,随着浓度增加,根尖数、总根长和总根表面积呈先升后降或直接降低的趋势;3种酚酸能够降低净光合速率(Pn),苯甲酸差异不显著;3种酚酸对叶绿素荧光参数均有影响,随着浓度的增加,Fv/Fm有降低趋势,但差异不显著,qP和~PSII呈显著下降趋势.NPQ呈显著升高趋势。本试验证明了3种酚酸对烟苗根系发育、光合作用有抑制作用关键词:烤烟;根系提取物;自毒作用;化感作用;酚酸中图分类号:$572文献标识码:A文章编号:1004—874X(2014)02—0014—05Efectofphenolicacidontheroo
3、tgrowthandphotosyntheticcharacteristicsoftobaccoseedlingWANGMao—sheng,LIMing,YANGXiu-xiang,WANGHan—eheng,QIUZhong~zhi.JIANGXuan—li(1.AgriculturalCollegeofGuizhouUniversity,Guiyang550025,China;2.GuizhouTobaccoResearchlnstitute/KeyLaboratoryofMolecularGenetics.GuizhouAcademyofTobacco
4、Science,Guiyang550081,China;3.ChinaTobaccoCorporationGuizhouCompany,Guiyang550004.CnⅡ:4.XingyiTobaccoMonopolyBureau,Xingyi562400,China)Abstract:Inordertoinvestigatetheinfluenceofphenolicallelochemicalsonthegrowthanddevelopmentoftobaccoseedlings,effectofbenzoicacid,p-hydroxybenzoica
5、cidandsalicylicacidonseedlingrootgrowth,characteristiesofgasexchange,chlorophyllfluorescenceparametersandchlorophyllcontentoftobaccowereanalyzedinthisstudy.ResultshowedthatchlorophyllcontentofseedlingleaffSPADvalue1firstincreasedandthendecreasedwiththeenhanceHientofthethreephenolic
6、acids;Threephenolicacidsallsignificantlyinhibitedthegrowthoftobaccoseedlingroot,suchastipnumber,totalrootlengthandtotalrootsurfaceareawhichshowedthetrendoffirstincreasedandthendecreasedordecreaseddirectly;threephenolicacidsalldecreasedthenetphotosyntheticrate(Pn),therewasnosignific
7、antdifferenceinthetreatmentofbenzoicacid;threephenolicacidsal1hadeffeetonchlorophyllfluorescenceparameters.theFv/Fmvaluedecreasedwiththeincreasingofconcentrations,whilewithnosignificantdiference,qPandPSIIvaluessignificantlydecreased.Ourstudyexhibitedthatallthreephenolicacidsinhibit
8、edthedevelopingoftobaccose
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