Nevertheless, other enzymes (peroxidases) including peroxiredoxins and glutathioneperoxidases, which use thioredoxins or glutaredoxins as reducing substrates, also contribute to H2O2 removal in plants. (wikipedia.org)
The ascorbate-glutathione cycle, sometimes Foyer-Halliwell-Asada pathway, is a metabolic pathway that detoxifies hydrogen peroxide (H2O2), a reactive oxygen species that is produced as a waste product in metabolism. (wikipedia.org)
Germination of selected vegetable seeds including corn (Zea mays L.), squash (Cucurbita pepo L.), and tomato (Solanum lycopersicum L.) was studied in water with different concentrations of hydrogen peroxide (H2O2) solution ranging from 0, 0. (researchgate.net)
The use of hydrogen peroxide (H2O2) is recently recommended for use in drip irrigation particularly for cleaning of drip emitters. (researchgate.net)
Peroxiredoxins1
2011 ). On the other side, plants have developed some enzymatic systems including superoxide dismutases (SOD), catalases (CAT), ascorbate peroxidases (APX), peroxiredoxins and non-enzymatic mechanisms to protect against oxidative damage caused by these ROS (Agrawal et al. (springeropen.com)
Peroxidase activity registered a significant increase by threefold in mitochondria and fourfold in soluble fraction in both Se and mimosine groups. (typeset.io)
Molecules2
In water solutions, this substance is present as a monovalent anion, ascorbate- (Asc-), which easily donates electrons to oxidized molecules and scavenges reactive oxygen species (ROS). (deepdyve.com)
2016) also suggested that H2O2 molecules play dual roles in plant physiological and developmental processes. (researchgate.net)
Since glutathione, ascorbate and NADPH are present in high concentrations in plant cells it is assumed that the glutathione-ascorbate cycle plays a key role for H2O2 detoxification. (wikipedia.org)
Water3
In the first step of this pathway, H2O2 is reduced to water by ascorbate peroxidase (APX) using ascorbate (ASC) as the electron donor. (wikipedia.org)
showed that the effect of H2O2 on corn seed germination was significantly greater than for seed treated with aerated water but no H2O2. (researchgate.net)
Relatively less known are the effects of H2O2 in irrigation water on seed germination, seedling growth and establishment. (researchgate.net)
Plant1
To understand the mechanism of tolerance to deferent stresses in tea plant, a new glutathione peroxidase gene of tea plant was cloned and its expression pattern was analyzed under abiotic and biotic stresses. (springeropen.com)
The enhanced effects on germination with H2O2 have a) been reported for seed with pathogenic infestations (Szopniska, 2014) i.e. a biocidal effect, and b) mediated through the oxidation of germination inhibitors present in the seed coat or/and in the pericarp, i.e. a seed treatment effect. (researchgate.net)
Increase1
Exogenous ascorbate also induces a moderate increase in programmed cell death symptoms in intact roots, but it does not activate Ca2+ influx currents in patch-clamped root protoplasts. (deepdyve.com)
Growth1
tested 24-h seed pre-treatments with H2O2 with 50 mM being optimal with improved seed germination, seedling vigour and growth in corn, squash (Cucurbita pepo L.) and tomato (Solanum lycopersicum L.). Increased germination and seedling growth of peas (Pisum sativum L. 'Alaska') was shown by Barba-Espin et al. (researchgate.net)
GLUTATHIONE6
The ascorbate-glutathione cycle, sometimes Foyer-Halliwell-Asada pathway, is a metabolic pathway that detoxifies hydrogen peroxide (H2O2), a reactive oxygen species that is produced as a waste product in metabolism. (wikipedia.org)
The cycle involves the antioxidant metabolites: ascorbate, glutathione and NADPH and the enzymes linking these metabolites. (wikipedia.org)
Dehydroascorbate is reduced to ascorbate by dehydroascorbate reductase (DHAR) at the expense of GSH, yielding oxidized glutathione (GSSG). (wikipedia.org)
Since glutathione, ascorbate and NADPH are present in high concentrations in plant cells it is assumed that the glutathione-ascorbate cycle plays a key role for H2O2 detoxification. (wikipedia.org)
Nevertheless, other enzymes (peroxidases) including peroxiredoxins and glutathioneperoxidases, which use thioredoxins or glutaredoxins as reducing substrates, also contribute to H2O2 removal in plants. (wikipedia.org)
Reactive1
Chromium(VI) reduction by ascorbate: role of reactive intermediates in DNA damage in vitro. (nih.gov)
Electron3
In the first step of this pathway, H2O2 is reduced to water by ascorbate peroxidase (APX) using ascorbate (ASC) as the electron donor. (wikipedia.org)
the net electron flow is from NADPH to H2O2. (wikipedia.org)
Reaction of chromium(VI) with one equivalent of ascorbate was studied by electron paramagnetic resonance spectroscopy in the presence of 0.10 M 5,5-dimethyl-1-pyrroline-1-oxide (DMPO) at room temperature in 0.10 M (N-[2-hydroxyethyl]piperazine-N'-[2-ethanesulfonic acid]) (HEPES) and 0.05 M tris(hydroxymethyl)aminomethane hydrochloride (Tris-HCl) buffers (pH 7.0 room temperature). (nih.gov)
Plants2
Ünyayar, Serpil 2018-05-29 00:00:00 Drought-stressed plants accumulate cyclitols such as myo-inositol, pinitol, quercitol in the cytosol. (deepdyve.com)
Exogenous myo-inositol significantly decreased H2O2, membrane damage and proline levels and AP (except for 5 µM) and CAT activity, compared with untreated plants. (deepdyve.com)