不同黄化程度桃叶片生理指标及矿质养分含量差异研究.pdf

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1、西南农业学报2014年27卷4期1522SouthwestChinaJournalofAgriculturalSciencesV01．27N4文章编号：1001—4829(2014)04—1522—05不同黄化程度桃叶片生理指标及矿质养分含量差异研究陈栋，涂美艳，李靖，孙淑霞，谢红江，江国良(四川省农业科学院园艺研究所·农业部西南地区园艺作物生物学与种质创制重点实验室，四川成都610066)摘要：以‘北京13号’桃为材料，探讨了不同黄化程度叶片相关生理指标及矿质元素含量差异以及与黄化程度的关系。结果表明：chl和chla、ehlb含量随着叶片黄化程度加剧均明显下降；叶片SOD活性

2、随黄化程度加剧，呈下降一上升一再下降一再上升趋势变化，而叶片CAT活性与SOD活性变化趋势刚好相反；叶片POD活力、POD比活力随黄化程度加剧均下降。随黄化程度加剧，叶片全N、P、K、zn含量均上升，Ca、Mg、Fe、Mn含量明显下降，N／Fe、P／Fe、MFe、Zn／Fe比值上升，Ca／Fe比值迅速下降，K／Fe和Mn／Fe比值在黄化初期上升，重度黄化时再下降。相关性分析表明，桃叶片叶绿素含量与叶片POD活力、POD比活力以及全ca、Mg、Fe含量呈极显著正相关，与叶片全N、P、K、zn含量呈显著负相关；叶片Fe含量与叶片全N、P、Zn含量呈显著负相关，与叶片全Ca、Mg、Mn

3、含量呈显著正相关。关键词：黄化叶片；叶绿素；酶活性；矿质养分；相关性中图分类号：S662．1文献标识码：AStudyonDiferencesofPhysiologicalIndicatorsandMineralNutrientContentofDiferentYellowingDegreeofPeachLeavesCHENDong，TUMei-yan，LIJing，SUNShu-xla，XIEHong-jiang，JIANGGuo·liang‘(HorticultureInstitute，SichuanAcademyofAgriculturalSciences·KeyLabora

4、toryofHorticulturalCropsBiologyandGermplasmEnhance-mentinSouthwest，MinistryofAgriculture，SichuanChengdu610066，China)Abstract：‘Beijing13’peachw88used88thematerialtodiscussthediferencesofphysiologicalindicatorsandmineraldementscontentre-latedwiththediferentyellowingdegreeofleavesandtheirrelatio

5、ntotheyellowingdegree．’I1leresultsshowedthat：thecontentofcMort~phyUandchla，chlbsignificantlydecreasedwithleafefiolationdegreeincreasing；LeafSODactivityshowedthedown—up—down-upchangingtendencywithaggravationoftheyelowingdegree，leafCATandSODactivitiesshowedthechangingtendencyofthereverse；I~fPOD

6、vig-or，PODspecificvitalitydecreasedwithaggravationoftheyelowingdegree．Withetiolationdegreeaggravated，thetotalN，P，K，zinccon—tentofleavesincreased，thetots]Ca，Mg，Fe，Mncontentofleavessignifcantlydecreased；1’heN／Fe，P／Fe，Mg／Fe，zinc／Feratioin—creased，andtheCa／Feratiodecreasedrapidly，theK／FeandMn／Fer

7、atioincreasedintheearlystageofyelowinganddecreasedintheheavyyellowing．111eresultsofcorrelationanalysisshowedthatthechlorophylcontenthadsignifcantlypositivecorrelationwithPODvigor．PODspecifcvitalityandCa，Mg，Fecontentofleaves，andhadsignificantl