资源描述：
《丛枝菌根在植物修复重金属污染土壤中的作用》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。
1、第27卷第2期生态学报Vol.27,No.22007年2月ACTAECOLOGICASINICAFeb.,2007丛枝菌根在植物修复重金属污染土壤中的作用12王发园,林先贵(1.河南科技大学农学院,洛阳471003;2中国科学院南京土壤研究所生物与生化研究室,南京210008)摘要:丛枝菌根(Arbuscularmycorrhizae,AM)是自然界中分布最广的一类菌根,AM真菌能与陆地上绝大多数的高等植物共生,常见于包括重金属污染土壤在内的各种生境中。在重金属污染条件下,AM真菌可以减轻重金属对植物的毒害,影响植物对重金属的吸
2、收和转运,在重金属污染土壤的植物修复中显示出极大的应用潜力。重点介绍了AM真菌对植物重金属耐性的影响及其在植物提取和植物稳定中的应用等方面的进展,讨论了未来研究所面临的任务和挑战。关键词:丛枝菌根;植物提取;植物稳定;重金属污染文章编号:100020933(2007)0220793209中图分类号:Q938,X171,X53文献标识码:ARoleofabuscularmycorrhizaeinphytoremediationofheavymetal2contaminatedsoils12WANGFa2Yuan,LINXian2G
3、ui1AgriculturalCollege,HenanUniversityofScienceandTechnology,Luoyang471003,China2DepartmentofSoilBiologyandBiochemistry,InstituteofSoilScience,ChineseAcademyofSciences,Nanjing210008,ChinaActaEcologicaSinica,2007,27(2):0793～0801.Abstract:Phytoremediation,includingphyt
4、oextraction,phytostabilizationandphytovolatilization,isaninsituremediationtechnologywithconsiderablepromisesforrestoringheavymetal2contaminatedsites.Inrecentyearstheapplicationofsymbioticmicroorganismssuchasmycorrhizalfungitoenhancephytoremediationefficiencyhasattrac
5、tedmoreandmoreattention.Itiswellknownthatarbuscularmycorrhizae(AM)areubiquitoussymbioticassociationsfoundinbothnaturalandagriculturalecosystems,includingheavymetalcontaminatedsites.AMfungiprovidedirectlinksbetweensoilandroots,andconsequentlymayhaveanessentialcontribu
6、tiontophytoremediationbyinfluencingheavymetalavailabilityandenhancingplanttolerance.ThemechanismsexertedbyAMfungitoattenuateheavymetalstressestoplantsmayincludechelation/immobilizationofheavymetalintheextraradicalmycelium,improvedmineralnutrition(especiallyP),changes
7、inrhizospherepH,regulationofmetaltransportergeneexpressions,etc.Furthermore,AMfungialsoaffectmetaluptakebyplantsfromsoilandtranslocationfromroottoshoot,however,mycorrhizaleffectsmaydependonelements,plantandfungalspecies/ecotypes.Fortheremediationofagriculturalsoils,p
8、hytoextractionisanidealstrategy.Inthiscase,AMfungimaystimulatephytoextractionbyessentiallyimprovingplantgrowthandincreasingtotalmet
