1. Sanità di Toppi L, Gabbrielli R (1999) Response to cadmium in higher plants. Environ Exp Bot 41:105–130
2. Peralta JR, Gardea-Torresdey JL, Tiemann KJ, Gomez E, Arteaga S, Rascon E, Parsons JG (2001) Study of the effects of heavy metals on seed germination and plant growth in alfalfa (Medicago sativa L.) grown in solid media. Bull Environ Contam Toxicol 66(6):727–734
3. Reichman SM (2002) The responses of plants to metal toxicity: a review focusing on copper, manganese and zinc. The Australian Minerals and Energy Environment Foundation, Melbourne, Australia, Occasional Paper 14:1–54
4. Liu D, Jiang W, Zhao FM, Lu C (1994) Effects of lead on root growth, cell division and nucleolus of Allium cepa. Environ Pollut 86:1–4
5. Metwally A, Safronova VI, Belimov AA, Dietz KJ (2005) Genotypic variation of the response to cadmium toxicity in Pisum sativum L. J Exp Bot 56(409):167–178