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当前位置: 首页 > 文章 > 丛枝菌根真菌对紫花苜蓿吸收菲和芘的影响 农业环境科学学报 2012 (10) 1920-1926
Position: Home > Articles > Effects of Arbuscular Mycorrhizal Fungi on the Uptake of Phenanthrene and Pyrene by Alfalfa Journal of Agro-Environment Science 2012 (10) 1920-1926

丛枝菌根真菌对紫花苜蓿吸收菲和芘的影响

作  者：
孙艳娣;凌婉婷;刘娟;宗炯
单  位：
南京农业大学土壤有机污染控制与修复研究所
关键词：
丛枝菌根真菌;多环芳烃;植物吸收;土壤
摘  要：
采用横式三隔室盆栽试验方法,研究了丛枝菌根真菌(AMF)根内球囊霉(Glomus intraradices,G.i)对紫花苜蓿(Medicago sativaL.)吸收土壤中菲和芘的影响。结果表明:G.i可与紫花苜蓿形成良好的共生体,侵染率平均达61.20%,不同强度菲和芘污染对G.i菌根侵染率的影响差异不显著;接种G.i的植株根系干重增加59.08%。接种G.i增加了根系和茎叶中菲和芘的含量及积累量,根系和茎叶中菲积累量与其生物量(干重计)间呈显著正相关;与菲相比,接种G.i处理后植株芘含量和积累量的增幅更大。G.i限制了菲和芘从植株根系向茎叶的传输,对芘尤为明显,接种G.i植株根系向茎叶转运芘的比例比不接种对照降低了13.85%～37.47%。
译  名：
Effects of Arbuscular Mycorrhizal Fungi on the Uptake of Phenanthrene and Pyrene by Alfalfa
作  者：
SUN Yan-di,LING Wan-ting,LIU Juan,ZONG Jiong(Institute of Organic Contaminant Control and Soil Remediation,Nanjing Agriculture University,Nanjing 210095,China)
关键词：
arbuscular mycorrhizal fung(iAMF);polycyclic aromatic hydrocarbons(PAHs);plant uptake;soil
摘  要：
The arbuscular mycorrhizal fung(iAMF)-mediated uptake of polycyclic aromatic hydrocarbons(PAHs)by alfalfa(Medicago sativa L.)was investigated using horizontal three-compartment microcosm systems.Glomus intraradices(G.i)was selected,and phenanthrene and pyrene were experimented as representative PAHs.The alfalfa roots were clearly colonized by G.i in soils contaminated by test PAHs,and the mycorrhizal colonization rate amounted to 61.20%.The concentrations and accumulation amounts of phenanthrene and pyrene in plant root and shoot increased with the G.i inoculation,and more significant enhancement was shown for pyrene.Significant positive correlations were observed between the accumulation of phenanthrene in plan(troot or shoot)and the plant biomass.The G.i inoculation limited the translocation of PAHs from root to shoot,especially for pyrene.Compared with the control treatment without AMF inoculation,the ratio of pyrene translocated from mycorrhiza-colonized root to shoot decreased 13.85%～37.47%.The higher concentrations and accumulation amounts of phenanthrene and pyrene in mycorrhiza-colonized versus nonmycorrhiza-colonized plants indicated that the extended hyphae of arbuscular mycorrhizal fungi into PAH-spiked soil might absorb and transport PAHs to roots,resulting in enhanced residue of PAHs in roots.

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