Aluminum-induced cell death of barley-root border cells.pdf
Plant Cell Rep (2005) 24: 189–194 DOI -005-0939-7 BIOTIC AND ABIOTIC STRESS L. Tamas´ · S. Bud´ıkova´ · J. Huttova´ · I. Mistr´ık · M. Simonoviˇ covˇ a´ · B. Sirokˇ a´ Aluminum-induced cell death of barley-root border cells is correlated with peroxidase- and oxalate oxidase-mediated hydrogen peroxide production Received: 28 September 2004 / Revised: 24 January 2005 / Accepted: 9 February 2005 / Published online: 10 March 2005 C Springer-Verlag 2005 Abstract The function of root border cells (RBC) during Introduction aluminum (Al) stress and the involvement of oxalate oxidase, peroxidase and H2O2 generation in Al toxicity Metals are serious environmental pollutants that can occur were studied in barley roots. Our results suggest that RBC in the soil naturally or as industrial by-products. At plant effectively protect the barley root tip from Al relative physiological concentrations, several metals are essential to the situation in roots cultivated in hydroponics where micronutrient elements involved in a variety of metabolic RBC are not sustained in the area surrounding the root tip. processes. However, at elevated concentrations, these met- The removal of RBC from Al-treated roots increased root als can be toxic to many plant species. Aluminum (Al) growth inhibition, Al and Evans blue uptake, inhibition of is one of the most abundant elements t
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