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ascorbate/harilik müürlook
Link salvestatakse lõikelauale
Leht 1 alates 315 tulemused
Enhanced seed production under prolonged heat stress conditions in Arabidopsis thaliana plants deficient in cytosolic ascorbate peroxidase 2.
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Reactive oxygen species play a key role in the response of plants to abiotic stress conditions. Their level is controlled in Arabidopsis thaliana by a large network of genes that includes the H(2)O(2)-scavenging enzymes cytosolic ascorbate peroxidase (APX) 1 and 2. Although the function of APX1 has
From sequence analysis of three novel ascorbate peroxidases from Arabidopsis thaliana to structure, function and evolution of seven types of ascorbate peroxidase.
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Ascorbate peroxidases are haem proteins that efficiently scavenge H2O2 in the cytosol and chloroplasts of plants. Database analyses retrieved 52 expressed sequence tags coding for Arabidopsis thaliana ascorbate peroxidases. Complete sequencing of non-redundant clones revealed three novel types in
Partial purification and characterization of an ascorbate-reducible b-type cytochrome from the plasma membrane of Arabidopsis thaliana leaves.
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The plant plasma membrane (PM) contains more than one b-type cytochrome. One of these proteins has a rather high redox potential (can be fully reduced by ascorbate) and is capable of transporting electrons through the PM. Four genes encoding proteins with considerable homology to the sequences of
Expression analysis of the VTC2 and VTC5 genes encoding GDP-L-galactose phosphorylase, an enzyme involved in ascorbate biosynthesis, in Arabidopsis thaliana.
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Arabidopsis thaliana contains two GDP-L-galactose phosphorylase genes, VTC2 and VTC5, which are critical for ascorbate (AsA) biosynthesis. We investigated the expression levels of both VTC2 and VTC5 genes in wild-type A. thaliana and the AsA deficient mutants during early seedling growth. Ascorbate
Transient expression of Arabidopsis thaliana ascorbate peroxidase 3 in Nicotiana benthamiana plants infected with recombinant potato virus X.
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We have explored the transient over-expression of Arabidopsis thaliana ascorbate peroxidase 3 (APX3) in Nicotiana benthamiana using a viral vector based on the potato virus X (PVX). Plants infected with a PVX:APX3 hybrid had a similar progression of viral particles compared to control plants
Effects of leaf ascorbate content on defense and photosynthesis gene expression in Arabidopsis thaliana.
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Ascorbate deficiency in the Arabidopsis thaliana vtc1 mutant had no effect on photosynthesis, but modified defense pathways. The ascorbate content of vtc1 leaves was increased 14-fold after 10 mM ascorbate was supplied, without a concomitant change in redox state. High ascorbate modified the
Increased ascorbate content delays flowering in long-day grown Arabidopsis thaliana (L.) Heynh.
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Flowering requires the integration of different inductive stimuli, including light, temperature and hormones. In an attempt to assess whether ascorbate (ASC) could contribute to the control of flowering time, we analyzed the effects of increased ASC content on the transition to the reproductive
Ascorbate deficiency influences the leaf cell wall glycoproteome in Arabidopsis thaliana.
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The cell wall forms the first line of interaction between the plant and the external environment. Based on the observation that ascorbate-deficient vtc mutants of Arabidopsis thaliana have increased cell wall peroxidase activity, the cell wall glycoproteome of vtc2-2 was investigated. Glycoproteins
Jasmonic acid-induced hydrogen sulfide activates MEK1/2 in regulating the redox state of ascorbate in Arabidopsis thaliana leaves.
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In this paper, we investigated the relationship between hydrogen sulfide (H2S) and mitogen-activated protein kinase kinase (MEK1/2) in jasmonic acid (JA)-regulated the redox state of ascorbate in the leaves of Arabidopsis thaliana. The results showed that JA significantly enhanced
Antioxidant status, peroxidase activity, and PR protein transcript levels in ascorbate-deficient Arabidopsis thaliana vtc mutants.
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Ascorbate is the most abundant small molecule antioxidant in plants and is proposed to function, along with other members of an antioxidant network, in controlling reactive oxygen species. A biochemical and molecular characterization of four ascorbate-deficient (vtc) Arabidopsis thaliana mutants has
Genomic DNA structure of a gene encoding cytosolic ascorbate peroxidase from Arabidopsis thaliana.
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A genomic DNA clone encoding cytosolic ascorbate peroxidase was isolated from a genomic library of Arabidopsis thaliana, using a cDNA for the enzyme as a probe. Nucleotide sequence and primer extension analyses of this gene (APX1) revealed nine exons split by eight introns, one of which is inserted
Cytosolic ascorbate peroxidase from Arabidopsis thaliana L. is encoded by a small multigene family.
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A second cytosolic ascorbate peroxidase (cAPX; EC 1.11.1.11) gene from Arabidopsis thaliana has been characterised. This second gene (designated APX1b) maps to linkage group 3 and potentially encodes a cAPX as closely related to that from other dicotyledonous species as to the other member of this
Cloning of peroxisomal ascorbate peroxidase gene from barley and enhanced thermotolerance by overexpressing in Arabidopsis thaliana.
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A full-length cDNA clone (HvAPX1) encoding a peroxisomal type ascorbate peroxidase was isolated from barley (Hordeum vulgare cv. Haruna-nijyo) leaves by differential display. The deduced amino acid sequence of the HvAPX1 gene had 75.3% homology to that from the Gossypium hirsutum glyoxysomal APX
Cloning and sequencing of a cDNA encoding ascorbate peroxidase from Arabidopsis thaliana.
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A cDNA clone encoding ascorbate peroxidase (AP, EC 1.11.1.11) was isolated from a phage lambda gt11 library of cDNA from Arabidopsis thaliana by immunoscreening with monoclonal antibodies against the enzyme, and then sequenced. The cDNA insert hybridized to a 1.1 kb poly(A)+ RNA from leaves of A.
Ascorbate-mediated regulation of growth, photoprotection, and photoinhibition in Arabidopsis thaliana.
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The requirements for ascorbate for growth and photosynthesis were assessed under low (LL; 250 µmol m-2 s-1) or high (HL; 1600 µmol m-2 s-1) irradiance in wild-type Arabidopsis thaliana and two ascorbate synthesis mutants (vtc2-1 and vtc2-4) that have 30% wild-type ascorbate levels. The low ascorbate
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