Habiba M. El-Saht
Department of Botany, Faculty of Sciences, University of Mansoura, Mansoura, Egypt
ABSTRACT
This paper describes the changes in protein content, nucleic acids (RNA and DNA) content as well as the activity of glucose-6-phosphate dehydrogenase (G6PDH) and glyceraldehyde-3-phosphate dehydrogenase (G3PDH) in seedling (5-d-old) of sensitive-cultivar contender and in tolerant-cultivar Giza 3 treated with increasing concentrations of aluminium. Rapid increase in G6PDH (EC 1.1.1.49) and G3PDH (EC 1.1.1.40) activities were observed in Al-resistant cultivar, while no change in the activities of the two enzymes were observed in Al-sensitive cultivar during 5 days of germination. Rapid decreases in protein, RNA and DNA contents in sensitive-cultivar and in resistant-cultivar (at 150 M Al), were observed in seedlings treated with Al. On the other hand, significant increases in protein, RNA and DNA contents were observed in resistant cultivar treated with 50 and 100 μ M Al. These results suggest that rapid induction of G6PDH and G3PDH in the Al-resistant cultivar by Al may play a role in the mechanism of Al resistant, possibly by regulation of the pentose phosphate pathway and alteration in either lipid composition of plasma membrane (El-Saht, under publication), or alteration in nucleic acids and protein contents.
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How to cite this article
Habiba M. El-Saht, 2001. Effects of Aluminium Toxicity in Two Cultivars of Phaseolus vulgaris with Different Resistance to Aluminium
II: Effects on Protein, Nucleic Acids and Certain Respiratory Enzymes. Pakistan Journal of Biological Sciences, 4: 24-26.
DOI: 10.3923/pjbs.2001.24.26
URL: https://scialert.net/abstract/?doi=pjbs.2001.24.26
DOI: 10.3923/pjbs.2001.24.26
URL: https://scialert.net/abstract/?doi=pjbs.2001.24.26
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