ADAPTABILITY STUDY OF DIFFERENT GLOMUS MOSSEAE STRAINS TO SOIL HEAVY METAL CONTENT

required. Using plants in remediation of soils is regarded as an environmental friendly cleanup method (Gdspdr et al., 2004) and used w dely due to its va ious types (phytostabil zation, phytoextraction, rhizofiltration etc.) according to the aim of remediation (Simon et al., 2005). As the availability of heavy metals to plants and their toxicity depend on the reaction of the microbial activities in the rhizosphere (SchtltzendUbel et al., 2002), the efficiency of phytoremediation can be enhanced using by adequate selected, metal-tolerant inoculums of root symbionts such as arbuscular mycorrhizal fungi (AMF). AMF form obligatory mutualistic associations with a wide range of plant species. Many studies indicated the ability of AMF in improving of the nutrient supply of plants and protecting their hosts against heavy metal toxicity (Marschner et al., 1994; Leyval et al., 1997). However, to date little is known about what kind of factors may play the important roles in developing of tolerance and adaptation to heavy metals. The aim of this study was to compare the adaptability to the high soil Cd content of the five Glomus mosseae strains isolated from different soil types. The changing of infectivity and effectiveness of the strains were investigated in a pot experiment in soils treated with Cd at three levels (0, 50, 100 mg kg"1) harvested after 11 and 20 weeks.