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Effect of aluminum on protein oxidation, non-protein thiols and protease activity in seedlings of rice cultivars differing in aluminum tolerance.
- Source :
-
Journal of plant physiology [J Plant Physiol] 2014 Apr 15; Vol. 171 (7), pp. 497-508. Date of Electronic Publication: 2014 Mar 13. - Publication Year :
- 2014
-
Abstract
- The effect of toxic concentrations of aluminum (Al) was investigated on contents of protein-thiols, non-protein and total thiols, protein carbonylation and protease activity in the seedlings of Al-sensitive (Al-S) Indica rice cv. HUR-105 and Al-tolerant (Al-T) cv. Vandana grown in sand cultures. Al treatment of 178 μM and 421 μM for 3-12 days caused a significant decline in the level of protein thiols, rise in non-protein thiols (NPTs) as well as protein carbonyl content and an insignificant alteration in the level of total thiols in cv. HUR-105 seedlings. However, in the seedlings of Al-T cv. Vandana, no significant alteration could be observed on any of these parameters with Al treatment. Al treatment inhibited protease activity in roots, whereas the opposite trend was seen in shoots. New isozymes of protease appeared in shoots of cv. Vandana with increased level of Al treatment. Our results show a link between protein thiols and NPTs and suggest the role of NPTs in the repair and protection of protein thiols. Inhibitory effect of Al on protease activity in roots could be a major reason for Al rhizotoxic effects. Al tolerance in rice appears to be associated with lesser content of protein thiols in roots, smaller amount of carbonylated proteins in roots as well as shoots and higher protease activity in shoots.<br /> (Copyright © 2013 Elsevier GmbH. All rights reserved.)
- Subjects :
- Environmental Pollutants toxicity
Oryza genetics
Oryza metabolism
Plant Proteins genetics
Plant Roots drug effects
Plant Roots metabolism
Protein Carbonylation drug effects
Proteolysis drug effects
Sulfhydryl Compounds metabolism
Aluminum toxicity
Oryza drug effects
Oryza enzymology
Plant Proteins metabolism
Seedlings drug effects
Seedlings enzymology
Subjects
Details
- Language :
- English
- ISSN :
- 1618-1328
- Volume :
- 171
- Issue :
- 7
- Database :
- MEDLINE
- Journal :
- Journal of plant physiology
- Publication Type :
- Academic Journal
- Accession number :
- 24655385
- Full Text :
- https://doi.org/10.1016/j.jplph.2013.12.009