Alva A K and Chen E Q 1995 Effects of external copper concentration on uptake of trace elements by citrus seedlings. Soil Sci. 159, 59–64.
Google Scholar
Ali E A 1993 Damage to plants due to industrial pollution and their use as bioindicators in Egypt. Environ. Pollut. 81, 251–255.
Google Scholar
Baumeister W and Ernst W 1978 Mineralstoffe und Pflanzenwachstum. Fisher, Stuttgart, Germany. 416p.
Google Scholar
Bokori J 1994 Occurrence of cadmium in nature and its more important physiological characteristics. Magy. Allatorv. Lapja 49, 69–73.
Google Scholar
Broyer T C, Johnson C N and Paull R E 1972 Some aspects of lead in plant nutrition. Plant and Soil 36, 301.
Google Scholar
Chizzola R 1988 Metallic elements in herbs and spices grown in Austria. International Symposium on Heavy Metals and Pesticide Residue in Medicinal, Aromatic and Spice Plants Novi Sad Yugoslavia, May 25–28.
Davies J G and Parker M B 1993 Zinc toxicity symptom development and portioning of biomass and zinc in peanut plants. J. Plant Nutr. 12, 2353–2369.
Google Scholar
Davies B E 1993 Radish as an indicator plant for derelict land: uptake of zinc at toxic concentrations. Commun. Soil Sci. Plant Anal. 24, 1883–1895.
Google Scholar
Faber A and Niezgoda J I 1982 Contamination of soils and plants in a vicinity of the zinc and lead smelter. Rocz. Glebozn. 33, 93.
Google Scholar
Foy C D, Scott B J and Fisher J A 1988 Genetic differences in plant tolerance to manganese toxicity. In Manganese in Soils and Plant. Eds. R D Graham, R J Hannam and N CUreh. p 293. Kluwer Academic Publ., Dordrecht, the Netherlands.
Google Scholar
Gupta V K and Dixit M L 1992 Influence of soil applied cadmium on growth and nutrient composition on plant species. J. Indian Soc. Soil Sci. 4, 878–880.
Google Scholar
Isermann K 1977 Method to reduce contamination and uptake of lead by plants from car exhaust gases. Environ. Pollut. 12, 199.
Google Scholar
Ishenko G S, Butnik A S and Afanas'eva T F 1992 Evaluation of joint contamination of wheat crops by lead, cadmium, stroncium-90 and caesium-137. Agrokhimiya 6, 99–10.
Google Scholar
Kabata-Pendias A and Pendias H 1992 Trace Elements in Soils and Plants. IInd edit., CRC press. 365p.
Loneragan J F 1975 The availability and absorption of trace elements in soil-plant systems and their relation to movement and concentration of trace elements in plants. In Trace Elements in Soil-Plant-Animal Systems. Eds. D J D Nicholas and A R Egan. p 109. Academic Press, New York, USA.
Google Scholar
Luna C M, Gonzalez C A and Trippt V S 1994 Oxidative damage caused by an excess of copper in oat leaves. Plant and Cell Physiol. 1, 11–15.
Google Scholar
Lyszcz S and Ruszkowska M 1991 Different responses of some plant species to excess of zinc. Roczniki-Gleeboz 4, 215–221.
Google Scholar
Malysowa E and Patorczyk-Pytlik B 1991 Reaction of two oat varieties to cadmium content in the soil. Polish J. Soil Sci. 24, 205–210.
Google Scholar
Misra A 1992 Effect of zinc stress in Japanese mint as related to growth, Photosynthesis, chlorophyll contents and secondary plant products-the monotherpenes. Photosynthetica 26, 225–234.
Google Scholar
Misra A 1993 Iron deficiency and toxicity in Japanese mint Mentha arvensis L. J. Herbs Spices Med. Plants, 1, 65–75.
Google Scholar
Morishita T and Boratynski J K 1992 Accumulation of cadmium and other metals in organs of plants growing around metal smelters in Japan. Soil Sci. Plant Nutr. 4, 781–785.
Google Scholar
Narwal R P, Mahendra S, Singh J P, Dahiya D J and Singh M 1993 Cadmium-zinc interaction in maize grown on sewer water irrigated soil. Arid Soil Res. Rehabil. 2, 125–131.
Google Scholar
Rascio N, Vecchia F-dalla, Feretti M, Merlo L, Chisi R and Dalla-Vecchia F 1993 Some effects of cadmium on maize plants. Arch. Environ. Contam. Toxicol. 25, 244–249.
Google Scholar
Ren F C, Liu T C, Liu H Q and Hu B Y 1993 Influence of zinc on the growth, distribution of elements. and metabolism of one-year old American ginseng plants. J. Plant Nutr. 16, 393–405.
Google Scholar
Riedel G 1993 Effect of excessive contents of soil cadmium and zinc on the vitality of balsam poplar hybrids (Populus maximiwiczii × P. trichocarpa). Forstarchiv. 64, 17–20.
Google Scholar
Salim R, Al-Subu M M and Atallah A 1993 Effects of root and foliar treatments with lead, cadmium, and copper on the uptake distribution and growth of radish plants. Environ. Int. 19, 393–404.
Google Scholar
Salim R, Al-Subu M M, Douleh A, Chnavier L and Hagemeyer J 1992 Effects of root and foliar treatments of carrot plants with lead and cadmium on the growth, uptake and the distribution of uptake of metals in treated plants. J. Environ. Sci. Health, Part A. Environ. Sci. Eng. 27, 1739–1758.
Google Scholar
Salim R, AI-Subu M M Douleh A and Khalaf S 1992 Effects of growth and uptake of broad beans (Vicia fabae L.) by root and foliar treatments of plant with lead and cadmium. J. Environ. Sci. Health, Part A. Environ. Sci. Eng. 27, 1619–1642.
Google Scholar
Santos C M dos Neto M M P M, de-Varennes A, Marques-dos-Santos C, Dos Santos C M and DeVarennes A 1993 Some effects of different levels of lead on berseem. In Optimization of plant nutrition, Eds. M L van Beusichem and M A C Fragoso. Kluwer Academic Publishers, Dordrecht, The Netherlands. pp 517–521.
Google Scholar
Sengalevitch G 1993 Heavy metal pollution of the soils in the vicinities of non-ferrous metals combine near Plovdiv. Zemcdelie 1/2, 18–23.
Google Scholar
Shariatpanahi M and Anderson A C 1986 Accumulation of cadmium, mercury and lead by vegetables following long-term land application of waste-water. Sci. Total Environ. 52, 41–47.
Google Scholar
Sovljanski R, Lazic S, Macko U and Obradovic S 1990 Heavy metal content in medicinal and spice plants cultivated in Yugoslavia. Herba Hun. 29, 59–62.
Google Scholar
Sovljanski R, Kisgeci J, Obradovic S, Lazic S and Macko U 1989 The heavy metals contents and quality of hop cones treated by pesticides during vegetation. Acta Hortic. 249, 81–88.
Google Scholar
Zheljazkov V and Nielsen N 1993 Studies on the effect of heavy metals (Cd, Pb, Cu, Mn, Zn and Fe) upon the growth, productivity and quality of lavender (Lavandula vera D.C.) production. A paper presented at the 24rd International Symposium on Essential Oils, July 20–23, Berlin. J. Essential Oil Res. (In press).