Relationship between metal contents of soil and phyllospheric micro-organisms on Upper-Tisza area

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Article Title:	Relationship between metal contents of soil and phyllospheric micro-organisms on Upper-Tisza area
Authors:	Márta D. Tóth¹a*, Sándor Balázsy¹a, Olga Terek², Ostap Patsula², Judit L. Halász¹a, Zoltán Dinya¹c, László Simon¹b
Affiliation:	¹College of Nyíregyháza, Hungary a Institute of Biology, b Department of Land Management and Rural Development, Nyíregyháza, c Agrar and Molecular Research Institute ²Ivan Franko National University, Faculty of Plant Physiology, L’viv
Abstract:	The aim of study in 2007-2009 were investigated the relationship of soil-plant-metal content in dominant plants and soils on the Tisza river and flood-basin. Between 2007-2009 in soils of flood-basin 20.6-24.6 mg/kg Cr, 0.40- 1.15 mg/kg Cd, 28.4-66.7 mg/kg Cu, and 89.7-180.3 mg/kg Zn was found. The metal concentration range in roots of dominant plant species (Atremisia vulgaris L., Rubus caesius, Solidago canadensis) found in floodplains were 0.9-4.7 for Cr, 1.6-8.1 for Cd, 22.7-31.5 for Cu, and 106-186 for Zn in mg/kg. The leaves contained 0.7-3.9 Cr, 1.2-1.6 Cd, 0.6-42.8 Cu, and Zn 24.9-203.5 in mg/kg. Our study showed, that the high level of metals as soil contaminations and the high plants metal contents harmful in river compartment. Dominant bacteria were mostly Gram-negative micro-organisms: Pseudomonas, Enterobacter, Bacillus and Coryneform genera. The metal contents and number of bacteria showed positive correlation colonizing the leaves surfaces of plants.
Keywords:	micro-organisms, plant surfaces, metal contamination, floodplain, Upper Tisza
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*Correspondence:	Márta D. Tóth, College of Nyíregyháza, Institute of Biology, Str. Sóstói 31/B., H-4400, Nyíregyháza, Hungary, Tel: +36 06 42/599-400, Fax: +36 06 42/402-485, e-mail:dobrone@nyf.hu