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ubiquinone/nicotiana
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15 risultati
[Hormonal status of tobacco variety Samsun NN exposed to synthetic coenzyme Q10 (ubiquinone 50) and TMV infection].
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Hormonal system status has been analyzed in leaf disks of hypersensitive tobacco Nicotiana tabacum L. variety Samsun NN during the development of resistance to tobacco mosaic virus (TMV) induced by synthetic coenzyme Q10 (ubiquinone 50). The absolute and relative content of abscisic acid (ABA),
A homologue of the nuclear coded 49 kd subunit of bovine mitochondrial NADH-ubiquinone reductase is coded in chloroplast DNA.
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The mitochondrial NADH-ubiquinone reductase (complex I) is an assembly of approximately 26 different polypeptides. In vertebrates and invertebrates, seven of its subunits are the products of genes in the mitochondrial DNA, and homologues of these genes have been found previously in the chloroplast
[Effect of ubiquinone 50 and viral infection on phytohemagglutinin activity in development of induced resistance in tobacco plants].
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The effects of ubiquinone 50 (synthetic coenzyme Q10) and viral infection on phytohemagglutinin activity were studied in the tobacco (Nicotiana tabacum L.) cultivar Samsun NN, which carries the necrosis-formation locus and exhibits hypersensitivity to tobacco mosaic virus (TMV) and ubiquinone (Q10).
The 49 K subunit of NADH: ubiquinone reductase (complex I) from Neurospora crassa mitochondria: primary structure of the gene and the protein.
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The primary structure of the 49 K subunit of the respiratory chain NADH:ubiquinone reductase (complex I) from Neurospora crassa was determined by sequencing cDNA, genomic DNA and the N-terminus of the mature protein. The sequence lengths correlate to a molecular mass of 54,002 daltons for the
Genetic modification of tomato with the tobacco lycopene β-cyclase gene produces high β-carotene and lycopene fruit.
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Transgenic Solanum lycopersicum plants expressing an additional copy of the lycopene β-cyclase gene (LCYB) from Nicotiana tabacum, under the control of the Arabidopsis polyubiquitin promoter (UBQ3), have been generated. Expression of LCYB was increased some 10-fold in ripening fruit compared to
The mitochondrial external NADPH dehydrogenase modulates the leaf NADPH/NADP+ ratio in transgenic Nicotiana sylvestris.
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Plant mitochondria contain alternative external NAD(P)H dehydrogenases, which oxidize cytosolic NADH or NADPH and reduce ubiquinone without inherent linkage to proton pumping and ATP production. In potato, St-NDB1 is an external Ca2+-dependent NADPH dehydrogenase. The physiological function of this
Dyella tabacisoli sp. nov., a bacterium isolated from an arable soil sample of Nicotiana tabacum L.
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A Gram-stain-negative, aerobic, non-motile and rod-shaped bacterium, designated strain L4-6T, was isolated from an arable soil sample of tobacco in Huize, south-western China and subjected to polyphasic taxonomic characterization. The cells showed oxidase-positive and catalase-positive reactions.
Targeting the NAD7 subunit to mitochondria restores a functional complex I and a wild type phenotype in the Nicotiana sylvestris CMS II mutant lacking nad7.
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The mitochondrial DNA of the Nicotiana sylvestris CMSII mutant carries a 72-kb deletion comprising the single copy nad7 gene that encodes the NAD7 subunit of the respiratory complex I (NADH-ubiquinone oxidoreductase). CMSII plants lack rotenone-sensitive complex I activity and are impaired in
In the Nicotiana sylvestris CMSII mutant, a recombination-mediated change 5' to the first exon of the mitochondrial nad1 gene is associated with lack of the NADH:ubiquinone oxidoreductase (complex I) NAD1 subunit.
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We previously reported that the Nicotiana sylvestris CMSII mutant mitochondrial DNA carried a large deletion. Several expressed sequences, most of which are duplicated, and the unique copy of the nad7 gene encoding the NAD7 subunit of the NADH:ubiquinone oxidoreductase complex (complex I) are found
Induction of mitochondrial alternative oxidase in response to a cell signal pathway down-regulating the cytochrome pathway prevents programmed cell death.
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Treatment of tobacco (Nicotiana tabacum L. cv Petit Havana SR1) cells with cysteine (Cys) triggers a signal pathway culminating in a large loss of mitochondrial cytochrome (cyt) pathway capacity. This down-regulation of the cyt path likely requires events outside the mitochondrion and is effectively
Salicylic acid is an uncoupler and inhibitor of mitochondrial electron transport.
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The effect of salicylic acid (SA) on respiration and mitochondrial function was examined in tobacco (Nicotiana tabacum) suspension cell cultures in the range of 0.01 to 5 mm. Cells rapidly accumulated SA up to 10-fold of the externally applied concentrations. At the lower concentrations, SA
L-galactono-1,4-lactone dehydrogenase is required for the accumulation of plant respiratory complex I.
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Mitochondrial NADH-ubiquinone oxidoreductase (complex I) is the largest enzyme of the oxidative phosphorylation system, with subunits located at the matrix and membrane domains. In plants, holocomplex I is composed of more than 40 subunits, 9 of which are encoded by the mitochondrial genome (NAD
A homologue of a nuclear-coded iron-sulfur protein subunit of bovine mitochondrial complex I is encoded in chloroplast genomes.
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The chloroplast genomes of Marchantia polymorpha, Nicotiana tabacum, and Oryza sativa contain open reading frames (ORFs or potential genes) encoding homologues of some of the subunits of mitochondrial NADH:ubiquinone oxidoreductase (complex I). Seven of these subunits (ND1-ND4, ND4L, ND5, and ND6)
A structural model of the membrane-bound aromatic prenyltransferase UbiA from E. coli.
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The membrane-bound enzyme 4-hydroxybenzoic acid oligoprenyltransferase (ubiA) from E. coli is crucial for the production of ubiquinone, the essential electron carrier in prokaryotic and eukaryotic organisms. On the basis of previous modeling analyses, amino acids identified as important in two
Respiratory complex I deficiency results in low nitric oxide levels, induction of hemoglobin and upregulation of fermentation pathways.
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The cytoplasmic male-sterile (CMS) mutant of Nicotiana sylvestris which lacks NAD7, one of the subunits of respiratory complex I (NADH: ubiquinone oxidoreductase, EC 1.6.5.3), is characterized by very low (~10 times lower as compared to the wild type plants) emissions of nitric oxide (NO) under
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