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Inhibition of catalase activity as an early response of Arabidopsis thaliana cultured cells to the phytotoxin fusicoccin.

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In Arabidopsis thaliana cells, fusicoccin (FC) treatment induced an early and marked increase in the extracellular H(2)O(2) level. It also increased the huge hypo-osmotic stress-induced oxidative wave and, in addition, prevented the H(2)O(2) peak drop. These effects were apparently not linked to

Catalase deficiency drastically affects gene expression induced by high light in Arabidopsis thaliana.

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In plants, hydrogen peroxide (H(2)O(2)) plays a major signaling role in triggering both a defense response and cell death. Increased cellular H(2)O(2) levels and subsequent redox imbalances are managed at the production and scavenging levels. Because catalases are the major H(2)O(2) scavengers that

Comprehensive analysis and transcript profiling of Arabidopsis thaliana and Oryza sativa catalase gene family suggests their specific roles in development and stress responses.

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Stress induces the generation of Reactive Oxygen Species (ROS) that ultimately hampers the growth, development, and productivity of the plant. As an antioxidant enzyme, catalase converts hydrogen peroxide to water and keeps ROS level down to protect cells from stress-induced apoptosis. Here, a

Catalase is encoded by a multigene family in Arabidopsis thaliana (L.) Heynh.

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The catalase multigene family in Arabidopsis includes three genes encoding individual subunits that associate to form at least six isozymes that are readily resolved by nondenaturing gel electrophoresis. CAT1 and CAT3 map to chromosome 1, and CAT2 maps to chromosome 4. The nucleotide sequences of

Interaction of SOS2 with nucleoside diphosphate kinase 2 and catalases reveals a point of connection between salt stress and H2O2 signaling in Arabidopsis thaliana.

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SOS2, a class 3 sucrose-nonfermenting 1-related kinase, has emerged as an important mediator of salt stress response and stress signaling through its interactions with proteins involved in membrane transport and in regulation of stress responses. We have identified additional SOS2-interacting

Catalases CAT1 and CAT3 are not key enzymes in alleviating gamma irradiation-induced DNA damage, H2O2 accumulation, or lipid peroxidation in Arabidopsis thaliana.

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Gamma irradiation increased catalase activities at 0.1 kGy and decreased them at 10 kGy in Arabidopsis wild type and catalase-deficient mutants, cat3-1 and cat1 cat3. Irradiation induced DNA damage, H2O2 accumulation, and lipid peroxidation in both mutants as well as the wild type. Thus catalases

Senescence-specific regulation of catalases in Arabidopsis thaliana (L.) Heynh.

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Oxygen free radicals are thought to play an essential role in senescence, especially those derived from peroxisomes. Therefore, the activities of different isoforms of the peroxisomal hydrogen peroxide (H2O2)-scavenging enzyme catalase (CAT) were analysed during senescence of Arabidopsis. CAT2

Comprehensive functional analysis of the catalase gene family in Arabidopsis thaliana.

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In Arabidopsis, catalase (CAT) genes encode a small family of proteins including CAT1, CAT2 and CAT3, which catalyze the decomposition of hydrogen peroxide (H2O2) and play an important role in controlling homeostasis of reactive oxygen species (ROS). Here, we analyze the expression profiles and

Nucleotide Sequence of a cDNA for Catalase from Arabidopsis thaliana.

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Increase in catalase-3 activity as a response to use of alternative catabolic substrates during sucrose starvation.

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Periods of carbohydrate deprivation are commonly encountered by plant cells. Plants respond to this nutrient stress by the mobilization of stored carbohydrates and the reallocation of other cellular macromolecules to degradative pathways. Previously we identified a number of metabolic genes that are

Functional analysis of a wheat group 3 late embryogenesis abundant protein (TdLEA3) in Arabidopsis thaliana under abiotic and biotic stresses

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Late embryogenesis abundant (LEA) proteins are highly hydrophilic and thermostable proteins that could be induced by abiotic stresses in plants. Previously, we have isolated a group 3 LEA gene TdLEA3 in wheat. The data show that TdLEA3 was largely disordered under fully hydrated conditions and was

Primary stress responses in Arabidopsis thaliana exposed to gamma radiation.

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As the environment is inevitably exposed to ionizing radiation from natural and anthropogenic sources, it is important to evaluate gamma radiation induced stress responses in plants. The objective of this research is therefore to investigate radiation effects in Arabidopsis thaliana on individual

Annexin-like protein from Arabidopsis thaliana rescues delta oxyR mutant of Escherichia coli from H2O2 stress.

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Reactive oxygen species are common causes of cellular damages in all aerobic organisms. In Escherichia coli, the oxyR gene product is a positive regulator of the oxyR regulon that is induced in response to H2O2 stress. To identify genes involved in counteracting oxidative stress in plants, we

Antioxidant response of Arabidopsis thaliana seedlings to oxidative stress induced by carbon ion beams irradiation.

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Due to the fact that carbon ion beams irradiation as an important type of ionizing radiation can potentially cause oxidative stress in plants, it is significant to evaluate the antioxidant response of plants to carbon ion beams radiation. Therefore, the objective of this study is to investigate the

A genetic framework for H2O2 induced cell death in Arabidopsis thaliana.

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BACKGROUND To survive in a changing environment plants constantly monitor their surroundings. In response to several stresses and during photorespiration plants use reactive oxygen species as signaling molecules. The Arabidopsis thaliana catalase2 (cat2) mutant lacks a peroxisomal catalase and under

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