Cell wall uronic acid concentrations of resistant and sensitive cultivars of wheat and barley under boron toxicity

In this study, changes in cell wall uronic acid concentrations of boron (B) -tolerant and B-sensitive cultivars; of wheat and barley were analyzed in c ontrol (plants that were grown on water and received no B) and B-treated pl ants. Ten-day-old seedlings of wheat (Triticum aestivum L. 'Atay' (B-sensit ive) and 'Bolal' (B-tolerant)) and barley (Hordeum vulgare L. 'Hamidiye' (B -sensitive) and 'Anadolu' (B-tolerant)) were grown in H3BO3 solution (10 mM final concentration) or water for 3, 5, or 7 days. For determination of ch anges in cell wall uronic acid concentrations of wheat and barley cultivars , cell walls were extracted from root and leaf tissues of control and B-tre ated plants. Cell wall uronic acid concentrations of root and leaf tissues of each cultivar were statistically analyzed. Various reciprocal analyses w ere performed. These analyses were high-B-tolerant versus B-sensitive culti vars and control versus B-treated plants. In all reciprocal analyses, no si gnificant changes were observed. These data, thus, suggest that cell wall u ronic acid content does not contribute to detoxification of excess B in whe at and barley.