cytochrome oxidase/tobak

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Development and enzyme activity of protein bodies in proteinoplasts of tobacco root cells.

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The development of protein bodies in proteinoplasts of tobacco (Nicotiana tabacum L. var. Wis. 38) roots was investigated with TEM, HVEM, and enzyme cytochemistry. These plastids contain a three-dimensional network of fenestrated tubules which originate from invaginations of the inner membrane of

Interspecific somatic hybrid plants between eggplant (Solanum melongena) and Solanum torvum.

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Mesophyll protoplasts of eggplant (cv Black Beauty) and of Solanum torvum (both 2n=2x=24) were fused using a modification of the Menczel and Wolfe PEG/DMSO procedure. Protoplasts post-fusion were plated at 1 × 10(5)/ml in modified KM medium, which inhibited division of S. torvum protoplasts. One

Non-random chloroplast segregation inNicotiana tabacum (+)N. rustica somatic hybrids selected by dual nuclear-encoded resistance.

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Nicotiana tabacum (+)N. rustica interspecific somatic hybrids were produced by fusion of leaf mesophyll protoplasts of transgenic methotrexate-resistantNicotiana tabacum L. with leaf mesophyll protoplasts of transgenic kanamycin-resistantN. rustica L. Somatic hybrids were selected on the basis of

Mitochondrial DNA patterns are similar in gametosomatic and somatic hybrids of two Nicotiana species.

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The segregation and recombination patterns of mitochondrial genome in the somatic hybrids of Nicotiana tabacum and N. rustica were studied by RFLP analysis using four heterologous mitochondrial DNA probes, namely cytochrome oxidase subunit I (COI), cytochrome oxidase subunit II (COII), 26s rDNA and

Transmission of organelles in triploid hybrids produced by gametosomatic fusions of two Nicotiana species.

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Gametosomatic hybrids produced by the fusion of microspore protoplasts of Nicotiana tabacum Km(+)Sr(+) with somatic cell protoplasts of N. rustica were analysed for their organelle composition. For the analysis of mitochondrial (mt)DNA, species-specific patterns were generated by Southern

AtCOX17, an Arabidopsis homolog of the yeast copper chaperone COX17.

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We have identified a new plant gene, AtCOX17, encoding a protein that shares sequence similarity to COX17, a Cu-binding protein from yeast (Saccharomyces cerevisiae) and vertebrates that mediates the delivery of Cu to the mitochondria for the assembly of a functional cytochrome oxidase complex. The

Variable abundance of a mitochondrial DNA fragment in cultured tobacco cells.

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The relative abundance of a cloned 4.5 kilobase (kb) pair mitochondrial DNA sequence in two suspension cultures of tobacco (Nicotiana tabacum cv Turkish samsun and Nicotiana tabacum NT-1) has been examined. This sequence is 70-fold reduced in NT-1 relative to Turkish samsun; the reduction is

Mitochondrial complex I impairment and differential carbon monoxide sensitivity of cytochrome c oxidase in wild type and CMS II mutants of Nicotiana sylvestris.

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Plant mitochondria unlike their animal counterpart have some unique features with highly branched respiratory chain. The present work was undertaken in order to investigate the effect of loss/dysfunction of plant mitochondrial complex I on the relative flux of electrons through alternative oxidase

Respiratory ATP cost and benefit of arbuscular mycorrhizal symbiosis with Nicotiana tabacum at different growth stages and under salinity.

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Growth and maintenance partly depend on both respiration and ATP production during oxidative phosphorylation in leaves. Under stress, ATP is needed to maintain the accumulated biomass. ATP production mostly proceeds from the cytochrome oxidase pathway (COP), while respiration via the alternative

The induction of manganese superoxide dismutase in response to stress in Nicotiana plumbaginifolia.

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Superoxide dismutases (SODs) are metalloproteins that catalyse the dismutation of superoxide radicals to oxygen and hydrogen peroxide. The enzyme has been found in all aerobic organisms examined, where it plays a major role in the defence against toxic reduced oxygen species which are generated in

Roles for Plant Mitochondrial Alternative Oxidase Under Normoxia, Hypoxia, and Reoxygenation Conditions

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Alternative oxidase (AOX) is a non-energy conserving terminal oxidase in the plant mitochondrial electron transport chain (ETC) that has a lower affinity for oxygen than does cytochrome (cyt) oxidase. To investigate the role(s) of AOX under different oxygen conditions, wild-type (WT) Nicotiana

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