Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 19 of 19 for “"Ascorbate peroxidase"”.
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Effect of light stress on the homoiochlorophyllous resurrection plant Craterostigma wilmsii
… carotenoid (x + c) content, anthocyanin content, ascorbate peroxidase activity, and ultrastructure, were assessed. Shaded inner whorl leaves do not experience lightchlorophyll interactions, carotenoids and anthocyanin pigments do not accumulate and ascorbate peroxidase activity remains low in them …
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Cucurbit Downy Mildew (Pseudoperonospora cubensis): Cucumber Resistance
… genes encoding a basic PR-1 protein, a cytosolic ascorbate peroxidase protein and three resistance (R) gene proteins, in nineteen cultivars. All of the selected genes were analyzed using real-time PCR. The relative expression levels of the R-genes varied between cultivars. The basic PR-1 protein …
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Photoprotective role of beta -carotene and antioxidant enzymes: A shield against ultraviolet damage in Dunaliella bardawil
… nm), independently, for 24 hour test periods. Ascorbate and glutathione concentrations, ascorbate peroxidase activity, photosynthetic oxygen evolution and fluorescence parameters were monitored following exposure to UV and various light treatments to assess changes in photosynthetic processes. …
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Mechanisms Regulating the Response of Arabidopsis thaliana to Heat Stress
… and the cytosolic ROS scavenging enzyme, ascorbate peroxidase 1. Interestingly, MBF1c directly interacts with a heat-inducible trehalose phosphate synthase, TPS5, and mutants deficient in TPS5 are thermosensitive. These results indicate the existence of a tightly coordinated heat …
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Effects of Organic Soil Amendments on Soil Physiochemical and Crop Physiological Properties of Field Grown Corn (Zea mays) and Soybean (Glycine Max)
… (+37%), lower superoxide dismutase (-29%) and ascorbate peroxidase (-17%) activities, and lower malondialdehyde (-33%) contents relative to the control and low nitrogen treatments. There were no observed differences in catalase activity, which was likely due to the evolutionary advantage of C4 …
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Study of Thermotolerance Mechanism in Gossypium Hirsutum Through Identification of Heat Stress Genes
… cultivars show a lower expression. Similarly, Ascorbate Peroxidase I and Annexin 8, the two general stress proteins are also highly induced in at least one of the heat tolerant cultivars in response to heat treatment. No obvious differences were found in photochemical efficiency of PSII in the …
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Live cell proximity biotinylation enables proteomic analysis of mitochondria-endoplasmic reticulum contact sites
… and complex purification by using an engineered ascorbate peroxidase (APEX) to tag proximal endogenous proteins with biotin for subsequent purification and identification by mass spectrometry. Although this method worked well in membrane-enclosed compartments, it was insufficiently specific when …
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Physiology and Biochemistry of Lead Accumulation in Sesbania Drummondii
… activities of antioxidant enzymes such as ascorbate peroxidase (APX), guaiacol peroxidase (GPX), catalase (CAT), and superoxide dismutase (SOD). Growth in the presence of Pb resulted in a significant elevation in activities of APX, GPX, CAT and SOD, as well as glutathione (GSH) content. …
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Antioxidant responses of pea (Pisum sativum L.) protoplasts
… glutathione reductase activity decreased 70% and ascorbate peroxidase activity decreased 90%. The relationship of these changes to oxidative damage to the photosynthetic machinery remains to be assessed.
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Enhancement of Carotenoid Biosynthesis and Antioxidant Responses in Diatoms by Light Modulation
… activity of antioxidant enzymes such as ascorbate peroxidase, catalase, and superoxide dismutase. They act in complementarity of the antioxidant molecules synthesis. A high concentration of ascorbic acid, phenolics compounds and among them flavonoids were found in diatoms. These molecules …
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Enzyme engineering by directed evolution and applications in cellular imaging and proteomic mapping
… of BirA and promiscuous labeling of horseradish peroxidase towards capturing fluorescent live cellular migration tracks on the traversed extracellular matrix. We then utilized yeast display to develop a selection method for evolving peroxidases with improved activity to address the sensitivity …
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Engineered heme peroxidases as genetically encoded probes with diverse applications in cell biology
… to GFP has been developed for EM. Horseradish peroxidase (HRP), a multifunctional reporter enzyme widely used in bioanalytical assays, has been utilized for EM because of its ability to generate electron-dense deposits. In addition, HRP produces extremely sensitive chemiluminescent, …
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Photosynthetic and oxidative stress in the green alga Dunaliella tertiolecta: The effects of UV-B and UV-A radiation
… solar flux. Lastly, the discovery of least two ascorbate peroxidase (APX) isoforms suggests that like higher plants, green algae also possess APX isoenzymes. This is the first report documenting the presence of multiple APX isoforms within green algae.</p>
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THE DIVALENT CATION TRANSPORTER NRAMP IN PARASITE PERKINSUS MARINUS: GENOMIC, MOLECULAR, STRUCTURAL, FUNCTIONAL AND EVOLUTIONARY ASPECTS
… PmNramp isotypes, superoxide dismutases (PmSOD), ascorbate peroxidase (PmAPX) and heat shock proteins (PmHSP70 and PmHSP90) were trans-spliced with a trans-splicing leader (SL) highly similar to dinoflagellate SL. No change in transcription level of those genes was detected by real-time …
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Identification and analysis of mechanisms involved in a broad-spectrum disease resistant mutant of the winter wheat cv. Guardian
… of ROS scavenging enzymes (4, 24 hai), such as ascorbate peroxidase and a superoxidase dismutase isoform (CuZnSOD) in M66 which were absent from ‘Guardian’. Chitinase (PR protein) was also upregulated (24 hai) in M66 compared to ‘Guardian’.Monosomic and ditelosomic analysis of M66 revealed that …
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Responses of gas exchange and the antioxidant system of soybean cultivars to ozone and/or sulfur dioxide
… glutathione: GSH, GSSG; reduced and oxidized ascorbate: AA, dHAA) concentrations and enzymes (glutathione reductase: GRase; ascorbate peroxidase: APase; superoxide dismutase: SOD) activities were analyzed. Gas exchange rates of all cultivars were significantly inhibited by pollutants exposure. …
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Effects of Nitrate and Cytokinin on Nitrogen Metabolism and Heat Stress Tolerance of Creeping Bentgrass
… N. The activities of superoxide dismutase (SOD), ascorbate peroxidase (APX), and guaiacol peroxidase (POD) in roots were enhanced by high N at 19, 22, and 24% levels, respectively, relative to low N. Twenty-eight days of heat stress resulted in either the development of new isoforms or enhanced …
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Modulation of soybean and maize antioxidant activities by Caffeic acid and nitric oxide under salt stress
… were found to be superoxide dismutase (SOD), ascorbate peroxidase (APX), glutathione peroxidase (GPX), and glutathione reductase (GR), which contributed to the scavenging of ROS in soybean nodules under salt stress. The work reported in Chapter 2 has been published in a peer-reviewed journal …
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Label-free proteomic analysis of Xerophyta schlechteri leaf tissue under dehydration stress
… the activity of enzymatic antioxidants, namely, ascorbate peroxidase (APX), catalase (CAT), glutathione reductase (GR) and superoxide dismutase (SOD) were done at selected RWC points. There was a significant increase in antioxidant enzyme activity for APX, CAT, GR and SOD in the dehydrated plant …