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acetic acid/tobaksläktet
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Sida 1 från 131 resultat
Wounding Nicotiana tabacum Leaves Causes a Decline in Endogenous Indole-3-Acetic Acid.
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We have previously observed that auxin can act as a repressor of the wound-inducible activation of a chimeric potato proteinase inhibitor II-CAT chimeric gene (pin2-CAT) in transgenic tobacco (Nicotiana tobacum) callus and in whole plants. Therefore, this study was designed to examine endogenous
The relationship of indole-3-acetic acid content and growth of crown-gall tumor tissues of tobacco in culture.
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We have measured the content of the auxin, indole-3-acetic acid (IAA), in cloned, crown-gall teratoma line of Nicotiana tabacum L. cv. "Turkish" by a highly specific and sensitive radioimmunoassay. This tissue line, which does not require auxin for continuous growth in culture, exhibits two phases
Morphogenic responses of debudded tobacco plants to gibberellic Acid and indole-3-acetic Acid.
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Stem applications of indole-3-acetic acid (IAA) or gibberellic acid (GA) did not prevent or alter tumor or teratoma formation in debudded tobacco plants (Nicotiana tabacum L., var. One Sucker). The materials produced intense (in case of GA) and moderate (in case of IAA) stem proliferations when
A Microscale Technique for Gas Chromatography-Mass Spectrometry Measurements of Picogram Amounts of Indole-3-Acetic Acid in Plant Tissues.
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A microscale technique has been developed for routine quantifications of picogram amounts of indole-3-acetic acid (IAA) in plant tissues by combined gas chromatography-mass spectrometry. Low- and high-resolution selected-ion-monitoring and selected-reaction-monitoring mass spectrometry techniques
Inhibition of the indole-3-acetic acid-induced epinastic curvature in tobacco leaf strips by 2,4-dichlorophenoxyacetic acid.
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It has been reported that auxin induces an epinastic growth response in plant leaf tissues. Leaf strips of tobacco (Nicotiana tabacum L. 'Bright Yellow 2') were used to study the effects of indole-3-acetic acid (IAA), the principal form of auxin in higher plants, and a synthetic auxin,
A specific radioimmunoassay for nanogram quantities of the auxin, indole-3-acetic acid.
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We have developed a specific radioimmunoassay [RIA] for indole-3-acetic acid (IAA) in the 0.2 ng to 12 ng range which, in principle, can be extended to other indole auxins as well. Methods are presented for obtaining suitable antibody, for the RIA procedure, and for measuring IAA in methanolic
Indole-3-acetic Acid Synthesis in Tumorous and Nontumorous Species of Nicotiana.
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The synthesis of indole-3-acetic acid (IAA) in the enzyme extracts of Nicotiana glauca, Nicotiana langsdorffii, their F1 hybrid, their amphidiploid hybrid, and the nontumorous mutant of the hybrid was investigated. Tryptamine, a possible precursor of IAA biosynthesis in Nicotiana tabacum, was not
Endogenous indole-3-acetic Acid in the stem of tobacco in relation to flower neoformation as measured by mass spectroscopic assay.
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The contents of free indole-3-acetic acid (IAA) and alkali-labile, conjugated IAA were measured in relation to a ;floral gradient' present in epidermis and subepidermis tissues of flowering plants of Nicotiana tabacum by capillary gas-chromatographic spectrometric analysis by selected ion monitoring
Effect of 1,2-benzisoxazole-3-acetic acid on plant regeneration from protoplasts of Nicotiana tabacum.
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Benzisoxazole-3-acetic acid, a new synthetic growth regulator, was administered to protoplast cultures from Nicotiana tabacum and subsequently to the developed microcalluses, to test its activity on plant regeneration from protoplasts in different culture conditions. Such activity, compared to that
Bound Form Indole-3-acetic Acid Synthesis in Tumorous and Nontumorous Species of Nicotiana.
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The synthesis of H(2)O-soluble and NaOH-hydrolyzable bound forms of indole-3-acetic acid (IAA) in petiole slices of Nicotiana glauca, Nicotiana langsdorffii, and their tumorous and nontumorous hybrids in the presence of exogenous (14)C-IAA was investigated. The synthesis of conjugates progressively
Electrical patterns of tobacco cells in media containing indole-3-acetic acid or 2,4-dichlorophenoxyacetic acid : Their relation to organogenesis and herbicide action.
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A simple, inexpensive, and stable drive-unit for a vibrating probe is described. It was used to measure transcellular electrical currents and their stability in cells from suspension cultures of Nicotiana tabacum L. var. virginica. The cells were highly variable in size, morphology and
Mechanism of indole-3-acetic acid oxidation by plant peroxidases: anaerobic stopped-flow spectrophotometric studies on horseradish and tobacco peroxidases.
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Indole-3-acetic acid (IAA) is a powerful plant growth regulator. The oxidative decarboxylation of IAA by plant peroxidases is thought to be a major degradation reaction involved in controlling the in vivo level of IAA. Horseradish peroxidase isoenzyme C and an anionic tobacco peroxidase isolated
The relative importance of tryptophan-dependent and tryptophan-independent biosynthesis of indole-3-acetic acid in tobacco during vegetative growth.
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A quantitative study of indole-3-acetic acid (IAA) turnover, and the contribution of tryptophan-dependent and tryptophan-independent IAA-biosynthesis pathways, was carried out using protoplast preparations and shoot apices obtained from wild-type and transgenic, IAA-overproducing tobacco (Nicotiana
Molecular functional analysis of auxin/indole-3-acetic acid proteins (Aux/IAAs) in plant disease resistance in cassava.
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Auxin/indole-3-acetic acid proteins (Aux/IAAs) play important roles in auxin signaling pathways, with extensive involvement in plant development and plant response to abiotic and biotic stresses. Manihot esculenta (Cassava) is one of the most important biomass energy crops in tropical regions;
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
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