Potassium starvation induces oxidative stress inSolanum lycopersicumL. roots.

21:55 EDT 19th September 2014 | BioPortfolio

Summary of "Potassium starvation induces oxidative stress inSolanum lycopersicumL. roots."

The relationship between potassium deficiency and the antioxidative defense system has received little study. The aim of this work was to study the induction of oxidative stress in response to K(+) deficiency and the putative role of antioxidants. The tomato plants were grown in hydroponic systems to determine the role of reactive oxygen species (ROS) in the root response to potassium deprivation. Parameters of oxidative stress (malondialdehyde and hydrogen peroxide (H(2)O(2)) concentration), activities of antioxidant enzymes (superoxide dismutase (SOD), catalase (CAT), ascorbate peroxidase (APX), dehydroascorbate reductase (DHAR) and glutathione reductase (GR)) and antioxidant molecules (ascorbate (ASC) and glutathione) were investigated. H(2)O(2) was subcellularly located by laser confocal microscopy after potassium starvation in roots. During the first 24h, H(2)O(2) induced the cascade of the cellular response to low potassium, and ROS accumulation was located mainly in epidermal cells in the elongation zone and meristematic cells of the root tip and the epidermal cells of the mature zones of potassium starved roots. The activity of the antioxidative enzymes SOD, peroxidase and APX in potassium deprivation significantly increased, whereas CAT and DHAR activity was significantly depressed in the potassium starvation treatment compared to controls. GR did not show significant differences between control and potassium starvation treatments. Based on these results, we put forward the hypothesis that antioxidant molecule accumulations probably scavenge H(2)O(2) and might be regenerated by the ASC-glutathione cycle enzymes, such as DHAR and GR.

Affiliation

Department of Stress Biology and Plant Pathology, CEBAS-CSIC, Campus de Espinardo, P.O. Box 164, 30100 Espinardo-Murcia, Spain.

Journal Details

This article was published in the following journal.

Name: Journal of plant physiology
ISSN: 1618-1328
Pages: 1366-74

Links

PubMed Articles [10226 Associated PubMed Articles listed on BioPortfolio]

Rice RCN1/OsABCG5 mutation alters accumulation of essential and nonessential minerals and causes a high Na/K ratio, resulting in a salt-sensitive phenotype.

Mineral balance and salt stress are major factors affecting plant growth and yield. Here, we characterized the effects of rice (Oryza sativa L.) reduced culm number1 (rcn1), encoding a G subfamily ABC...

Epithelial-mesenchymal transition induces endoplasmic-reticulum-stress response in human colorectal tumor cells.

Tumor cells are stressed by unfavorable environmental conditions like hypoxia or starvation. Driven by the resulting cellular stress tumor cells undergo epithelial-mesenchymal transition. Additionally...

A proteomic view of cell physiology of the industrial workhorse Bacillus licheniformis.

Bacillus licheniformis is known for its high protein secretion capacity and is being applied extensively as a host for the industrial production of enzymes such as proteases and amylases. In its natur...

Effect of oxidative stress on expression and function of human and rat organic anion transporting polypeptides in the liver.

Reactive oxygen species (ROS) have physiological function and involve alteration of physical state. However, it is not clear effect of oxidative stress on pharmacokinetics. Organic anion transporting ...

Effect of different modes of delivery on cord blood oxidative stress markers.

Normal pregnancy has been associated with oxidative stress injury. Oxidative stress has been linked with poor perinatal outcome and birth asphyxia. The severity of this oxidative stress in newborn may...

Clinical Trials [1363 Associated Clinical Trials listed on BioPortfolio]

Study of the Ability of Clarithromycin to Induce Oxidative Stress

The purpose of the study is to examine whether Klacid® (Clarithromycin) will induce oxidative stress (stress from oxygen) in healthy subjects. This is done by measuring the content of a p...

The Effect of Niacin Administration on Oxidative Stress in Patients With Hypercholesterolmia, as Measured by the Use of a Novel Biomarker

1. Treatment of Hypercholesterolemic patients with niacin will cause a significant decrease in oxidative stress and a decrease in the atherogenecity in blood samples of the patie...

The Comparison of Oxidative Stress Between Inhalation Anesthetics

Oxidative stress is an unavoidable event during cardiac surgery. Isoprostanes have been demonstrated to be a reliable biomarker for the evaluation of oxidative stress in vivo.The aims of t...

Quantitative in Vivo Biomarkers of Oxidative Stress in Diabetes

Oxidative stress has been implicated in the development and complications of diabetes. Hyperglycemia and insulin resistance or insufficiency in diabetes can cause oxidative stress by exces...

Evaluation of Oxidative Stress and Effect of Levothyroxine Treatment on Oxidative Stress in Hashimoto Disease

Oxidative stress leads to or accompanies with numerous disease. Oxidative balance in subclinical hypothyroid or euthyroid state in Hashimoto disease are not known. Effect of levothyroxine...

Medical and Biotech [MESH] Definitions

A disturbance in the prooxidant-antioxidant balance in favor of the former, leading to potential damage. Indicators of oxidative stress include damaged DNA bases, protein oxidation products, and lipid peroxidation products (Sies, Oxidative Stress, 1991, pxv-xvi).

A condition due to decreased dietary intake of potassium, as in starvation or failure to administer in intravenous solutions, or to gastrointestinal loss in diarrhea, chronic laxative abuse, vomiting, gastric suction, or bowel diversion. Severe potassium deficiency may produce muscular weakness and lead to paralysis and respiratory failure. Muscular malfunction may result in hypoventilation, paralytic ileus, hypotension, muscle twitches, tetany, and rhabomyolysis. Nephropathy from potassium deficit impairs the concentrating mechanism, producing polyuria and decreased maximal urinary concentrating ability with secondary polydipsia. (Merck Manual, 16th ed)

Permanganic acid (HMnO4), potassium salt. A highly oxidative, water-soluble compound with purple crystals, and a sweet taste. (From McGraw-Hill Dictionary of Scientific and Technical Information, 4th ed)

The appearance of carbonyl groups (such as aldehyde or ketone groups) in PROTEINS as the result of several oxidative modification reactions. It is a standard marker for OXIDATIVE STRESS. Carbonylated proteins tend to be more hydrophobic and resistant to proteolysis.

A direct-acting oxidative stress-inducing agent used to examine the effects of oxidant stress on Ca(2+)-dependent signal transduction in vascular endothelial cells. It is also used as a catalyst in polymerization reactions and to introduce peroxy groups into organic molecules.

Search BioPortfolio:
Loading
Advertisement
Advertisement

Searches Linking to this Article