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naphthalene/nicotiana
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Pagina 1 a partire dal 28 risultati
Comparison of mechanisms controlling uptake and accumulation of 2,4-dichlorophenoxy acetic acid, naphthalene-1-acetic acid, and indole-3-acetic acid in suspension-cultured tobacco cells.
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Accumulation of radiolabelled naphthalene-1-acetic acid (1-NAA), 2,4-dichlorophenoxyacetic acid (2,4-D), and indole-3-acetic acid (IAA) has been measured in suspension-cultured tobacco (Nicotiana tabacum) cells. In this paper is presented a simple methodology allowing activities of the auxin influx
Hormonal characterization of a nonrooting naphthalene-acetic Acid tolerant tobacco mutant by an immunoenzymic method.
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The comparative analysis of plant hormones was undertaken on a 1-naphthaleneacetic acid tolerant mutant and normal tobacco (Nicotiana tabacum cv Xanthi) plantlets. The mutant plantlet was scrubby and impaired in its root morphogenesis. Degeneration of the root meristem was studied on tissue
Impermeant auxin analogues have auxin activity.
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Protein conjugates of 5-aminonaphthalene-1-acetic acid and of 5-azido-naphthalene-1-acetic acid have been prepared and evaluated for auxin activity in two types of assay. In standard elongation tests with pea (Pisum sativum L.) epicotyl sections the conjugates are inactive. However, if the epicotyls
Effect of Plant Growth Regulators on Calcium-stimulated Serine Transport into Tobacco Cells.
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The transport of serine into tobacco cells (Nicotiana tabacum L.) cultured in liquid medium was examined. Transport was inhibited approximately 50% by 2,4-dichlorophenoxyacetic acid, indoleacetic acid, alpha-naphthalene acetic acid, and kinetin at a concentration of 10 micrograms per milliliter.
Cytokinin controls the cell cycle at mitosis by stimulating the tyrosine dephosphorylation and activation of p34cdc2-like H1 histone kinase.
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In excised pith parenchyma from Nicotiana tabacum L. cv. Wisconsin Havana 38, auxin (naphthalene-1-acetic acid) together with cytokinin (6-benzylaminopurine) induced a greater than 40-fold increase in a p34cdc2-like protein, recoverable in the p13suc1-binding fraction, that had high H1 histone
Evidence that auxin-induced growth of tobacco leaf tissues does not involve cell wall acidification
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Interveinal strips (10 x 1.5 mm) excised from growing tobacco (Nicotiana tabacum L. cv Xanthi) leaves have an auxin-specific, epinastic growth response that is developmentally regulated and is not the result of ethylene induction (C.P. Keller, E. Van Volkenburgh [1997] Plant Physiol 113: 603-610).
Auxin-Induced Epinasty of Tobacco Leaf Tissues (A Nonethylene-Mediated Response).
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Interveinal strips (10 x 1.5 mm) excised from growing tobacco (Nicotiana tabacum L. cv Xanthi) leaves curled >300[deg] when incubated for 20 h in 5 to 500 [mu]M [alpha]-naphthalene acetic acid or 50 to 500 [mu]M indole-3-acetic acid. Epinasty was not induced without auxin or by the auxin analog
The Initiation of Auxin Autonomy in Tissue from Tobacco Plants Carrying the Auxin Biosynthesizing Genes from the T-DNA of Agrobacterium tumefaciens.
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Tobacco (Nicotiana tabacum cv Havana 425) plants containing the indole-3-acetic acid biosynthesizing genes (1 and 2) from the T-DNA of Agrobacterium tumefaciens strain T37-ADH(2) (mutated at the cytokinin biosynthesis gene 4) were used to study the physiological basis of the suppression and
Resistance of transgenic tobacco seedlings expressing the Agrobacterium tumefaciens C58-6b gene, to growth-inhibitory levels of cytokinin is associated with elevated IAA levels and activation of phenylpropanoid metabolism.
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We previously reported that the Agrobacterium tumefaciens C58-6b gene confers resistance to growth-inhibitory levels of exogenously applied N(6)-benzyladenine (BA, cytokinin) in transgenic tobacco (Nicotiana tabacum) seedlings. Here, we found that intracellular levels of indoleacetic acid (IAA,
Inhibition by Ethylene of Auxin-Promotion of Flower Bud Formation in Tobacco Explants Is Absent in Plants Transformed by Agrobacterium rhizogenes.
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The in vitro regeneration of flower buds was studied in pedicel explants from tobacco (Nicotiana tabacum L., cv Petit Havana) transformed with Agrobacterium rhizogenes, pRi 1855 (agropine type). At a low concentration (0.1 micromolar) of 1-naphthalene-acetic acid, pedicel strips from phenotypically
Development of rhizosecretion as a production system for recombinant proteins from hydroponic cultivated tobacco.
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Rhizosecretion is an attractive technology for the production of recombinant proteins from transgenic plants. However, to date, yields of plant-derived recombinant pharmaceuticals by this method have been too low for commercial viability. Studies conducted focused on three transgenic plant lines
Solubilization and Characterization of a Membrane-Bound Auxin-Binding Protein from Cell Suspension Cultures of Nicotiana tabacum.
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A membrane-bound auxin-binding protein (MABP) was solubilized by Triton X-100 from cell suspension cultures of Nicotiana tabacum L. Solubilization of MABP was dependent on the detergent concentration and more than 80% of naphthalene-1-acetic acid (NAA)-binding activity was recovered by an optimum
Temperature-sensitive expression of auxin-autotrophy by crown-gall teratoma cells of tobacco.
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Crown-gall teratoma tissues of tobacco (Nicotiana tabacum L.) grow in culture at 25° in the absence of added auxin or cell-division factors. The capacity of these tissues to grow without added auxin is temperature sensitive. At 35° auxin provided as α-naphthalene acetic acid or
Cytokinin effect on protein synthesis in vivo in higher plants.
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The influence of naphthalene-1-acetic acid and kinetin on protein synthesis in vivo was investigated by measuring the incorporation of radioactive amino acids into polypeptides of synthesizing polysomes. The second subculture of sterile pith tissue of Nicotiana tabacum L. cv. Wisconsin 38 grown on a
Auxin Conjugation by Tobacco Mesophyll Protoplasts : Correlations between Auxin Cytotoxicity under Low Density Growth Conditions and Induction of Conjugation Processes at High Density.
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Auxin induction of the proliferation of Nicotiana tabacum (cv Xanthi) mesophyll protoplasts and of protoplast-derived cells was studied. The growth-promoting properties and cytotoxicities at high concentrations of IAA and naphthaleneacetic acid were strongly affected by cell density. The induction
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