分子植物育种,2023年,第21卷,第3期,第978-987页MolecularPlantBreeding,2023,Vol.21,No.3,978-987研究报告ResearchReport镉胁迫对八角金盘生长及生理特性的影响张敏李燕宁朋程小毛黄晓霞*西南林业大学园林园艺学院,国家林业与草原局西南风景园林工程技术研究中心,昆明,650224*通信作者,huangxx@swfu.edu.cn摘要本研究通过对常用绿化植物八角金盘一年生实生苗进行不同浓度CdCl2溶液[CK(0μmol/LCd2+),Cd1(20μmol/LCd2+),Cd2(40μmol/LCd2+),Cd3(80μmol/LCd2+)和Cd4(120μmol/LCd2+)]处理,探究镉胁迫对八角金盘生长及生理特性的影响。结果显示,20μmol/L镉胁迫对八角金盘植株影响较小,表现为株高、叶片数、叶面积、最大光化学效率(Fv/Fm)、实际光化学效率(Y(Ⅱ))等变化不显著;40、80μmol/L镉胁迫处理下,其生长指标下降,丙二醛(MDA)含量上升,抗氧化酶活性和可溶性蛋白含量上升,说明此浓度下植株可通过自身抗氧化机制等来适应镉胁迫;120μmol/L镉胁迫下,植株株高、叶面积显著降低,叶绿素含量、Fv/Fm、Y(Ⅱ)、可溶性蛋白含量均显著下降至最低,MDA含量累积较高,说明在高浓度镉胁迫下植株生长严重受抑,且膜脂过氧化严重。本研究结果可为八角金盘在镉污染土壤条件下的推广种植提供理论参考。关键词八角金盘(Fatsiajaponica);镉胁迫;生长形态;生理特性EffectsofCadmiumStressonGrowthandPhysiologicalCharacteristicsofFatsiajaponicaZhangMinLiYanNingPengChengXiaomaoHuangXiaoxia*SouthwestLandscapeArchitectureEngineeringResearchCenterofStateForestryandGrasslandAdministration,CollegeofLandscapeArchitecture,HorticultureSouthwestForestryUniversity,Kunming,650224*Correspondingauthor,huangxx@swfu.edu.cnDOI:10.13271/j.mpb.021.000978AbstractInthisstudy,inordertoinvestigatetheeffectofcadmiumstressonthegrowthandphysiologicalcharacteristicsofFatsiajaponica,wetreatedtheirseedingplantswithdifferentconcentrationofCdCl2solution[CK(0μmol/LCd2+),Cd1(20μmol/LCd2+),Cd2(40μmol/LCd2+),Cd3(80μmol/LCd2+)andCd4(120μmol/LCd2+)]undercadmiumstress.Theresultsshowedthatcadmiumstresswith20μmol/LCd2+hadlittleeffectonF.japonicagrowthandphysiologicalindexes,andshowednosignificantchangesinplantheight,numberofleaves,theleafareas,themaximumphotochemicalefficiencyofPSII(Fv/Fm)andact...