Cu、Cd胁迫对油菜生长的影响及其生物有效性的开题报告摘要：本文旨在探讨Cu、Cd胁迫对油菜生长的影响及其生物有效性。实验结果表明：Cu、Cd胁迫显著抑制了油菜生物量的增长以及根系和叶片的形态结构和生理指标，其中Cd胁迫表现出更强的毒害效应；与对照组相比，Cu、Cd胁迫对油菜根系POD、SOD、CAT等抗氧化酶活性的提高及其生物膜脂质过氧化物含量的增加，提示油菜对Cu、Cd胁迫产生了抗氧化适应性。此外，Cu、Cd对油菜的生物有效性存在差异，其生物有效性表现为根吸收强于叶吸收，而Cd生物有效性表现出更为明显的抑制性。关键词：油菜、Cu、Cd、胁迫、生长、生物有效性Abstract:ThispaperaimstoexploretheeffectsofCuandCdstressonthegrowthofrapeseedandtheirbioavailability.TheexperimentalresultsshowedthatCuandCdstresssignificantlyinhibitedthegrowthofrapeseedbiomass,morphologicalstructureandphysiologicalindicatorsofrootsandleaves,amongwhichCdstressshowedstrongertoxicity.Comparedwiththecontrolgroup,CuandCdstressincreasedtheactivityofantioxidantenzymessuchasPOD,SOD,CATinrapeseedrootsandthecontentoflipidperoxideinbiologicalmembranes,indicatingthatrapeseedhadantioxidantadaptabilitytoCuandCdstress.Inaddition,thereweredifferencesinthebioavailabilityofCuandCdtorapeseed,andthebioavailabilityofCuandCdshowedthatrootabsorptionwasstrongerthanleafabsorption,whilethebioavailabilityofCdshowedamoreobviousinhibitoryeffect.Keywords:rapeseed,Cu,Cd,stress,growth,bioavailability