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Bladzijde 1 van 48 resultaten
Patterns of phenylpropanoids in non-inoculated and potato virus Y-inoculated leaves of transgenic tobacco plants expressing yeast-derived invertase.
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The patterns of secondary metabolites in leaves of yeast invertase-transgenic tobacco plants (Nicotiana tabacum L. cv. Samsun NN) were analyzed. Plants expressing cytosolic yeast-derived invertase (cytInv) or apoplastic (cell wall associated) yeast invertase (cwInv) showed a characteristic
Correlation between arrested secondary plasmodesmal development and onset of accelerated leaf senescence in yeast acid invertase transgenic tobacco plants.
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Mature leaves of a transgenic tobacco plant (Nicotiana tabacum L. var. Samsun, line A41-10) that constitutively express a yeast-derived acid invertase gene develop symptoms which are characterized by the presence of greenish-yellow and green sectors in the same leaf, and onset of early leaf
Comparative genome based cis-elements analysis in the 5' upstream and 3' downstream region of cell wall invertase and Phenylalanine ammonia lyase in Nicotiana benthamiana.
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Plant secondary metabolites are widely used in human disease treatment; though primary metabolism provides precursors for secondary metabolism, not much has been studied to unravel the link connecting both the processes. Most common form of gene regulation interconnecting diverse metabolism occurs
Cloning of a CACTA transposon-like insertion in intron I of tomato invertase Lin5 gene and identification of transposase-like sequences of Solanaceae species.
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Very few CACTA transposon-like sequences have been described in Solanaceae species. Sequence information has been restricted to partial transposase (TPase)-like fragments, and no target gene of CACTA-like transposon insertion has been described in tomato to date. In this manuscript, we report on a
Understanding the role of defective invertases in plants: tobacco Nin88 fails to degrade sucrose.
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Cell wall invertases (cwINVs), with a high affinity for the cell wall, are fundamental enzymes in the control of plant growth, development, and carbon partitioning. Most interestingly, defective cwINVs have been described in several plant species. Their highly attenuated sucrose (Suc)-hydrolyzing
Tomato mitogen activated protein kinases regulate the expression of extracellular invertase Lin6 in response to stress related stimuli
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Activation of mitogen-activated protein kinases (MAPKs) is a common reaction of plant cells in defence-related signal transduction pathways. Since the downstream events after the activation of MAPKs are largely unknown in plants, the role of MAPKs in the coordinate regulation of defence reactions
Varied growth, biomass and cellulose content in tobacco expressing yeast-derived invertases.
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The effects of the expression of yeast-derived apoplastic (AI) and cytosolic (CI) invertases (EC 3.2.1.26) on biomass and structural carbohydrate accumulation in tobacco (Nicotiana tabacum L. cv. Xanthi) were evaluated. Transgenic tobacco plants expressing AI or CI under the control of either a
Regulation of arbuscular mycorrhization by carbon. The symbiotic interaction cannot be improved by increased carbon availability accomplished by root-specifically enhanced invertase activity.
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The mutualistic interaction in arbuscular mycorrhiza (AM) is characterized by an exchange of mineral nutrients and carbon. The major benefit of AM, which is the supply of phosphate to the plant, and the stimulation of mycorrhization by low phosphate fertilization has been well studied. However, less
Interspecies compatibility of the anther specific cell wall invertase promoters from Arabidopsis and tobacco for generating male sterile plants.
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Histochemical GUS-staining and fluorometric analyses revealed strong tissue specific activities of the cell wall invertase promoters Nin88 from Nicotiana tabacum and AtcwINV2 from Arabidopsis thaliana that are restricted tightly to anthers and pollen, respectively. Both in A. thaliana and N. tabacum
Cell wall invertase in tobacco crown gall cells : enzyme properties and regulation by auxin.
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The cell wall invertase from an Agrobacterium tumefaciens-transformed Nicotiana tabacum cell line (SR1-C58) was purified. The heterogeneously glycosylated enzyme has the following properties: M(r) 63,000, pH optimum at 4.7, K(m sucrose) 0.6 millimolar (at pH 4.7), pl 9.5. Enzyme activity is
Expression of a carrot invertase gene in tobacco suspension cells cultivated in batch and continuous culture conditions.
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Plant cells (Nicotiana tabacum) were genetically modified to produce an heterologous protein, the acidic invertase from carrot, and invertase production from suspension tobacco cells was investigated. Suspension cultures were grown in shake flasks and stirred bioreactor. Total invertase activity was
Inhibitors of plant invertases do not affect the structurally related enzymes of fructan metabolism.
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Plant fructan active enzymes (FAZYs), including the enzymes involved in inulin metabolism, namely sucrose:sucrose 1-fructosyltransferase (1-SST; EC 2.4.1.99), fructan:fructan 1-fructosyltransferase (1-FFT; EC 2.4.1.100) and fructan 1-exohydrolase (1-FEH; EC 3.2.1.153), are evolutionarily related to
RNA interference-mediated repression of cell wall invertase impairs defense in source leaves of tobacco.
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The significance of cell wall invertase (cwINV) for plant defense was investigated by comparing wild-type tobacco (Nicotiana tabacum) Samsun NN (SNN) with plants with RNA interference (RNAi)-mediated repression of cwINV (SNNcwINV). In source leaves of SNNcwINV, the activity of cwINV was repressed by
Expression analysis of Cell wall invertase under abiotic stress conditions influencing specialized metabolism in Catharanthus roseus.
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Catharanthus roseus is a commercial source for anti-cancer terpenoid indole alkaloids (TIAs: vincristine and vinblastine). Inherent levels of these TIAs are very low, hence research studies need to focus on enhancing their levels in planta. Since primary metabolism provides precursors for
Arbuscular mycorrhiza induces gene expression of the apoplastic invertase LIN6 in tomato (Lycopersicon esculentum) roots.
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Extracellular invertases are suggested to play a crucial role in the arbuscular mycorrhiza (AM) symbiosis to fulfil the increased sink function of the mycorrhizal root and the supply of the obligate biotrophic AM fungus with hexoses. In tomato (Lycopersicon esculentum), LIN6 represents an apoplastic
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