Mitochondria are the main target for oxidative damage in leaves of wheat (Triticum aestivum L.)

Photosynthesis, respiration, and other processes produce reactive oxygen species (ROS) that can cause oxidative modifications to proteins, lipids, and DNA. The production of ROS increases under stress conditions, causing oxidative damage and impairment of normal metabolism. In this work, oxidative d...

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Bibliographic Details
Published in:Journal of experimental botany 2004-08, Vol.55 (403), p.1663-1669
Main Authors: Bartoli, Carlos Guillermo, Gómez, Facundo, Martínez, Dana Ethel, Guiamet, Juan José
Format: Article
Language:English
Subjects:
Ascorbic acid
Ascorbic Acid - analysis
Biological and medical sciences
Chloroplasts
Chloroplasts - metabolism
Dehydration
drought
Flood damage
Fundamental and applied biological sciences. Psychology
Leaves
Metabolism
Mitochondria
Mitochondria - metabolism
Organelles
Oxidation-Reduction
oxidative damage
Oxidative Stress
Oxygen Consumption
Peroxisomes
Peroxisomes - metabolism
Photosynthesis, respiration. Anabolism, catabolism
Plant Leaves - metabolism
Plant physiology and development
Plants
Reactive oxygen species
Reactive Oxygen Species - metabolism
Research Papers: Cell and Molecular Biology, Biochemistry and Molecular Physiology
Thylakoids
Triticum - metabolism
Triticum aestivum L
wheat
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Summary:Photosynthesis, respiration, and other processes produce reactive oxygen species (ROS) that can cause oxidative modifications to proteins, lipids, and DNA. The production of ROS increases under stress conditions, causing oxidative damage and impairment of normal metabolism. In this work, oxidative damage to various subcellular compartments (i.e. chloroplasts, mitochondria, and peroxisomes) was studied in two cultivars of wheat differing in ascorbic acid content, and growing under good irrigation or drought. In well-watered plants, mitochondria contained 9–28-fold higher concentrations of oxidatively modified proteins than chloroplasts or peroxisomes. In general, oxidative damage to proteins was more intense in the cultivar with the lower content of ascorbic acid, particularly in the chloroplast stroma. Water stress caused a marked increase in oxidative damage to proteins, particularly in mitochondria and peroxisomes. These results indicate that mitochondria are the main target for oxidative damage to proteins under well-irrigated and drought conditions.
ISSN:0022-0957
1460-2431
1460-2431
DOI:10.1093/jxb/erh199