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The NtAMI1 gene functions in cell division of tobacco BY-2 cells in the presence of indole-3-acetamide.
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Tobacco (Nicotiana tabacum) Bright Yellow-2 (BY-2) cells can be grown in medium containing indole-3-acetamide (IAM). Based on this finding, the NtAMI1 gene, whose product is functionally equivalent to the AtAMI1 gene of Arabidopsis thaliana and the aux2 gene of Agrobacterium rhizogenes, was isolated
Functional Characterization of BoaMYB51s as Central Regulators of Indole Glucosinolate Biosynthesis in Brassica oleracea var. alboglabra Bailey.
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R2R3-MYB transcription factor MYB51 is known to control indole glucosinolate (indole GSL) biosynthesis in Arabidopsis. Here, two copies of BoaMYB51 have been isolated in Chinese kale (Brassica oleracea var. alboglabra Bailey), designated BoaMYB51.1 and BoaMYB51.2, which exhibit overlapping but
The AMI1 gene family: indole-3-acetamide hydrolase functions in auxin biosynthesis in plants.
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Novel genes that function in the conversion of indole-3-acetamide (IAM) into indole-3-acetic acid (IAA), which were previously thought to exist only in the bacterial genome, have been isolated from plants. The finding of the AtAMI1 gene in Arabidopsis thaliana and the NtAMI1 gene in Nicotiana
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
Tryptophan and indole analog mediated plastid transformation.
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A nonantibiotic/herbicide-resistance selection system for plastid transformation is described here in technical detail. This system is based on the feedback-insensitive anthranilate synthase (AS) α-subunit gene of tobacco (ASA2) as a selective marker and tryptophan (Trp) or indole analogs as
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
Indole acetonitrile-sensitivity of transgenic tobacco containing Arabidopsis thaliana nitrilase genes.
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The Arabidopsis thaliana genome has four nitrilase (nitrile aminohydrolase, EC 3.5.5.1) genes (NIT1 to NIT4). These nitrilases catalyze hydrolysis of indole-3-acetonitrile (IAN) to indole-3-acetic acid (IAA). Growth of A. thaliana is inhibited by IAN probably due to hydrolysis of IAN to IAA, while
Carbohydrates Stimulate Ethylene Production in Tobacco Leaf Discs : III. Stimulation of Enzymic Hydrolysis of Indole-3-Acetyl-l-Alanine.
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The sucrose-stimulated in vivo hydrolysis of indole-3-acetyl-l-alanine (IAAIa) in tobacco (Nicotiana tabacum L.) leaf discs was confirmed by in vitro analysis of an IAAIa-hydrolyzing enzyme isolated from the same tissue. The enzymic activity could be stimulated by either aging of the tissue or by
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
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