2Diaz G, Azconaguilar C, Honrubia M. Influence of arbuscular mycorrhizae on heavy metal (Zn and Pb) uptake and growth of Lygeum spartum and Anthyllis cytisoides. Plant Soil, 1996, 180: 241～249.
3Whitfiled L, Richards A J, Rimmer D L. Effects of mycorrhizal colonization on Thymus polytrichus from heavy-metal-contaminated sites in northern England. Mycorrhiza, 2004, 14:47～54.
4Jentschke G, Marschner P, Vodnik D, et al. Lead uptake by Picea abies seedlings: effects of nitrogen source and mycorrhizas. J. Plant Physiol., 1998,153: 97～104.
5Marschner P, Godbold D L, Jentschke G. Dynamics of lead accumulation in mycorrhizal and non-mycorrhizal Norway spruce (Picea abies (L) Karst). Plant Soil, 1996,178:239～245.
6Joner E J, Leyval C, Briones R. Metal binding capacity of arbuscular mycorrhizal mycelium. Plant Soil, 2000, 226: 227～234.
7Joner E J, Leyval C. Time-course of heavy metal uptake in maize and clover as affected by root density and different mycorrhizal inoculation regimes. Biol. Fert. Soils, 2001,33: 351～357.
8DixonBardgett R D, Mawdsley J L, Edwards S, et al. Plant species and nitrogen effects on soil biological properties of temperate upland grasslands. Functional Ecology,1999, 13: 650～660.
9Vvierzbicka M. Comparison of lead tolerance in Alliumcepa with other plant species. Environ. Poll.,1999,104(1):41～52.
10Hen H M, Zheng C R, Tu C. Chemical methods and phytoremediation of soil contaminated with heavy metals. Chemosphere, 2000, 41(1-2):229～234.
