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Side 1 fra 33 resultater
Auxin-facilitated utilization of glutamic acid by tobacco crown-gall teratoma cells.
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Teratoma tissues obtained by inoculating Nicotiana tabacum cv. "Turkish" with a moderately virulent strain of the crown-gall bacterium require the synthetic auxin, α-naphthaleneacetic acid (NAA) when glutamic acid is used as a sole nitrogen source in the culture medium. In contrast, growth on
Glutamic acid-induced shoot differentiation in tobacco callus tissues and changes in nicotine content and in activities of aminotransferases, ornithine transcarbamylase, and arginase.
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Floral bud calluses of Nicotiana tabacum L. var. Anand-2 produced multiple shoots on Murashige and Skoog's (MS) medium supplemented with 2 mg/l indole-3-acetic acid (IAA), 0.4 mg/l kinetin (Kn), and L-glutamic acid (2.5 mM). However cultures of calluses on MS medium containing only the IAA and Kn
The dominant glutamic acid metabolic flux to produce γ-amino butyric acid over proline in Nicotiana tabacum leaves under water stress relates to its significant role in antioxidant activity.
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γ-Amino butyric acid (GABA) and proline play a crucial role in protecting plants during various environmental stresses. Their synthesis is from the common precursor glutamic acid, which is catalyzed by glutamate decarboxylase and Δ(1) -pyrroline-5-carboxylate synthetase respectively. However, the
Labeling patterns in glutamic acid in Nicotiana rustica L. from carbon-14 dioxide.
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Metabolome and molecular basis for carbohydrate increase and nitrate reduction in burley tobacco seedlings by glycerol through upregulating carbon and nitrogen metabolism.
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Burley tobacco (Nicotiana Tabacum) is a chlorophyll-deficiency mutant. Nitrate is one precursor of tobacco-specific nitrosamines (TSNAs) and is largely accumulated in burley tobacco. To decrease nitrate accumulation in burley tobacco, glycerol, a polyhydric alcohol compound and physiological
A point mutation in the ethylene-inducing xylanase elicitor inhibits the beta-1-4-endoxylanase activity but not the elicitation activity.
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Ethylene-inducing xylanase (EIX) elicits plant defense responses in certain tobacco (Nicotiana tabacum) and tomato cultivars in addition to its xylan degradation activity. It is not clear, however, whether elicitation occurs by cell wall fragments released by the enzymatic activity or by the
SuperSAGE analysis of the Nicotiana attenuata transcriptome after fatty acid-amino acid elicitation (FAC): identification of early mediators of insect responses.
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BACKGROUND
Plants trigger and tailor defense responses after perception of the oral secretions (OS) of attacking specialist lepidopteran larvae. Fatty acid-amino acid conjugates (FACs) in the OS of the Manduca sexta larvae are necessary and sufficient to elicit the herbivory-specific responses in
Lipoxygenase-mediated modification of insect elicitors: generating chemical diversity on the leaf wound surface.
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Plants can distinguish mechanical damage from larval folivory through the recognition of specific constituents of larval oral secretions (OS) which are deposited on the surface of leaf wounds during feeding. Fatty acid-amino acid conjugates (FACs) are major constituents of the OS of Lepidopteran
Development and application of a full-length infectious clone of potato virus Y isolate belonging to SYR-I strain.
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Potato virus Y (PVY) causes huge damage to potato and tobacco production worldwide. The complete genome sequence of GZ, a PVY isolate (strain SYR-I) from Guizhou province, China, was cloned into the binary vector pCambia0390. Three introns were individually inserted into the P3 and CI ORFs to
Association of host protein VARICOSE with HCPro within a multiprotein complex is crucial for RNA silencing suppression, translation, encapsidation and systemic spread of potato virus A infection
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In this study, we investigated the significance of a conserved five-amino acid motif 'AELPR' in the C-terminal region of helper component-proteinase (HCPro) for potato virus A (PVA; genus Potyvirus) infection. This motif is a putative interaction site for WD40 domain-containing proteins, including
cDNA cloning and gene expression analysis of the microbial proteinase inhibitor of tobacco.
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Tobacco mosaic virus-infected tobacco (Nicotiana tabacum var. Samsun NN) leaves produce a serine proteinase inhibitor that has evolved a specificity for microbial proteinases. We have isolated two closely related cDNAs that were shown to encode two active inhibitors. Southern analysis of genomic
CHRK1, a chitinase-related receptor-like kinase in tobacco.
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A cDNA encoding a chitinase-related receptor-like kinase, designated CHRK1, was isolated from tobacco (Nicotiana tabacum). The C-terminal kinase domain (KD) of CHRK1 contained all of the conserved amino acids of serine/threonine protein kinases. The putative extracellular domain was closely related
Reversed phase chromatography of isoaccepting tRNA's from healthy and crown gall tissues from Nicotiana tabacum.
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RPC 5 (Reversed Phase Chromatography) of aminoacyl-tRNA's from healthy and crown gall (induced by Agrobacterium tume-faciens strain B6) tobacco tissues were compared for eleven amino acids. For ten amino acids: alanine, arginine, glutamic acid, glycine, isoleucine, leucine, lysine, methionine,
Relationship between Auxin and Amino Acid Metabolism of Tobacco Protoplast-Derived Cells.
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Single amino acids were found to be highly toxic to protoplast-derived cells of tobacco (Nicotiana tabacum cv Xanthi) cultured at low density in a culture medium containing a low naphthaleneacetic acid concentration (0.05 micromolar). The cytotoxicities of alanine, aspartic acid, asparagine,
Evidence for the participation of a 5-oxo-prolinase in degradation of glutathione in Nicotiana tabacum.
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During degradation of glutathione in tobacco suspension cultures substancial amounts of 5-oxo-proline are formed in vivo as well as in crude cell homogenates in vitro. The existance of a 5-oxo-prolinase that catalyzes the conversion of 5-oxo-proline to glutamic acid was demonstrated in tobacco
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