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. , Finlay , R. , Botton , B. and Chalot , M. ( 2000 ): Differential responses of ectomycorrhizal fungi to heavy metals in vitro . – Mycol. Res. 104 : 1366 – 1371 . http://dx.doi.org/10.1017/s0953756200003166

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Liao, V. H. C., Chien, M. T., Tseng, Y. Y., Ou, K. L. (2006) Assessment of heavy metal bioavailability in contaminated sediments and soils using green fluorescent protein-based bacterial biosensors. Environ. Pollut. 142 , 17

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Simon, L. (2001): Effects of natural zeolite and bentonite on the phytoavailability of heavy metals in chicory. pp. 261-271. In: Iskandar, I. K. (ed.), Environmental Restoration of Metals Contaminated Soil

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additions on heavy metal availability in light textured soils: implications for crop yields and metal uptakes. Environ. Pollut. , 121 , 413–423. Shepherd M. A. Effects of past

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Alcántara, E., Romera, F. J., Canete, M., de la Guardia, M. D. (1994): Effects of heavy metals on both induction and function of root Fe(III) reductase in Fe-deficient cucumber ( Cucumis sativus L.) plants

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63 1511 1522 Kirbağ-Zengin, F., Munzuroğlu, Ö. (2005) The effects of some heavy metals (Ni +2 , Co +2 , Cr +3 , Zn +2 ) on the amount of chlorophyll

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157 131 135 Naár Z. and Bíró B. 2006. Species composition of indigenous Trichoderma fungi affected by Cd, Ni and Zn heavy metals in calcareous

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640 Chaudhary, P., Dudeja, S. S., Kapoor, K. K. (2004): Effectivity of host- Rhizobium leguminosarum symbiosis in Haryana soils receiving sewage water/sludge containing heavy metals

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Misra, S., Zafarullah, M., Price-Haugghey, J., Gedamu, L. (1989) Analysis of stress-induced gene expression in fish cell lines exposed to heavy metals and heat shock. Biochem. Biophys. Acta 1007 , 325

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Three different insecticides: dimethoate, cypermethrin and amitraz were given, alone or combined with the heavy metals Pb, Hg and Cd, to male Wistar rats per os for 12 weeks from their 4th week of life. After the treatment period, the left hemisphere of the rats was exposed in urethane anaesthesia, and spontaneous and evoked cortical activity was recorded from the primary sensory areas. The effects of dimethoate on the spontaneous activity, and of dimethoate and amitraz on the evoked responses, were increased by the metal combination treatment, whereby the metals alone had no effect on the spontaneous and mild effect on the evoked activity. Finally, the animals were dissected, organ weights measured, and relative organ weights calculated. The weight gain of all treated groups was significantly retarded compared to the control. Several organ weights were also significantly reduced, mainly in groups receiving insecticide plus metal treatment. The toxic interactions observed in this work indicate that combined human exposure to environmental pesticide residues and heavy metals may have unexpectedly severe effects.

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