Aluminium induced changes in protein profiles of the first leaf in Al-sensitive and Al-tolerant barley cultivars

Protein composition in Al-sensitive and Al-resistant barley cultivars were examined in several cell compartments of the first leaf after Al stress. No differences were found in protein profiles of cell wall and peripheral mem brane fractions between control and Al treated plants of both barley cultiv ars growing in solution with 100 mu mol L-1 AlCl3. One cytoplasmic protein with molecular mass of 28 kDa and one 29 kDa integral membrane proteins wer e activated only in sensitive cultivar, while in resistant plants the prote in profiles of barley leaves remained without changes. These results indica te that Al stress applied to the root of Al-sensitive barley cultivar might be spread to the upper part of a plant and, as a consequence of Al or othe r kind of secondary stress protein composition in leaves can be influenced.