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Stranica 1 iz 26 rezultatima
Expression of recombinant cellulase Cel5A from Trichoderma reesei in tobacco plants.
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Cellulose degrading enzymes, cellulases, are targets of both research and industrial interests. The preponderance of these enzymes in difficult-to-culture organisms, such as hyphae-building fungi and anaerobic bacteria, has hastened the use of recombinant technologies in this field. Plant expression
Regulation of a sesquiterpene cyclase in cellulase-treated tobacco cell suspension cultures.
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The regulation of an elicitor-inducible sesquiterpene cyclase in tobacco (Nicotiana tabacum) cell suspension cultures was investigated. Sesquiterpene cyclase activity was absent from control cell cultures but induced to a maximum within 15 hours of cellulase addition to the cell cultures. The
Comparison of Thermobifida fusca Cellulases Expressed in Escherichia coli and Nicotiana tabacum Indicates Advantages of the Plant System for the Expression of Bacterial Cellulases.
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The economic conversion of lignocellulosic biomass to biofuels requires in addition to pretreatment techniques access to large quantities of inexpensive cellulases to be competitive with established first generation processes. A solution to this problem could be achieved by plant based expression of
S-carvone suppresses cellulase-induced capsidiol production in Nicotiana tabacum by interfering with protein isoprenylation.
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S-Carvone has been described as a negative regulator of mevalonic acid (MVA) production by interfering with 3-hydroxy-3-methyl glutaryl coenzyme A reductase (HMGR) activity, a key player in isoprenoid biosynthesis. The impact of this monoterpene on the production of capsidiol in Nicotiana tabacum,
In-depth characterization of Trichoderma reesei cellobiohydrolase TrCel7A produced in Nicotiana benthamiana reveals limitations of cellulase production in plants by host-specific post-translational modifications.
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Sustainable production of biofuels from lignocellulose feedstocks depends on cheap enzymes for degradation of such biomass. Plants offer a safe and cost-effective production platform for biopharmaceuticals, vaccines and industrial enzymes boosting biomass conversion to biofuels. Production of intact
Trichoderma viride cellulase induces resistance to the antibiotic pore-forming peptide alamethicin associated with changes in the plasma membrane lipid composition of tobacco BY-2 cells.
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BACKGROUND
Alamethicin is a membrane-active peptide isolated from the beneficial root-colonising fungus Trichoderma viride. This peptide can insert into membranes to form voltage-dependent pores. We have previously shown that alamethicin efficiently permeabilises the plasma membrane, mitochondria
Improved recombinant cellulase expression in chloroplast of tobacco through promoter engineering and 5' amplification promoting sequence.
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Economical production of bioethanol from lignocellulosic biomass still faces many technical limitations. Cost-effective production of fermentable sugars is still not practical for large-scale production of bioethanol due to high costs of lignocellulolytic enzymes. Therefore, plant molecular farming,
High-level bacterial cellulase accumulation in chloroplast-transformed tobacco mediated by downstream box fusions.
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The Thermobifida fusca cel6A gene encoding an endoglucanase was fused to three different downstream box (DB) regions to generate cel6A genes with 14 amino acid fusions. The DB-Cel6A fusions were inserted into the tobacco (Nicotiana tabacum cv. Samsun) chloroplast genome for protein expression.
Tomato LeAGP-1 is a plasma membrane-bound, glycosylphosphatidylinositol-anchored arabinogalactan-protein.
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Arabinogalactan-proteins (AGPs) are a class of highly glycosylated, hydroxyproline-rich glycoproteins that function in plant growth and development. Tomato LeAGP-1 represents a major AGP expressed in cultured cells and plants. Based on cDNA and amino acid sequence analyses along with carbohydrate
Abscisic acid negatively regulates elicitor-induced synthesis of capsidiol in wild tobacco.
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In the Solanaceae, biotic and abiotic elicitors induce de novo synthesis of sesquiterpenoid stress metabolites known as phytoalexins. Because plant hormones play critical roles in the induction of defense-responsive genes, we have explored the effect of abscisic acid (ABA) on the synthesis of
Preparation and fusion properties of protoplasts from mature pollen of Nicotiana tabacum.
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A method to remove the exine from mature tobacco pollen and to release numerous intact pollen protoplasts has been developed. Post-anthesis binucleate pollen was treated with water, buffered with MES at pH 5.5, for two hours. Rupture of the exine was caused by the force of pollen hydration exposing
Isolation and Regeneration of Tobacco Mesophyll Cell Protoplasts under Low Osmotic Conditions.
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A method is described for the isolation of large numbers of tobacco (Nicotiana tabacum L. cv. Xanthi-nc) mesophyll cell protoplasts under relatively low external osmotic conditions. The procedure utilized 0.2 m sucrose as the primary osmoticum and a mixture of 0.5% macerozyme, 4% cellulase, and 2%
Elicitor-inducible 3-hydroxy-3-methylglutaryl coenzyme a reductase activity is required for sesquiterpene accumulation in tobacco cell suspension cultures.
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Addition of cell wall fragments from Phytophthora species or cellulase from Trichoderma viride, but not pectolyase from Aspergillus japonicus, to tobacco (Nicotiana tabacum) cell suspension cultures induced the accumulation of the extracellular sesquiterpenoid capsidiol. Pulse-labeling experiments
Evaluation of parameters in the isolation of viable protoplasts from cultured tobacco cells.
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A systematic evaluation disclosed the following conditions to be optimum for the isolation of viable protoplasts from cultured cells of Nicotiana tabacum L. ;Bright Yellow' grown in liquid suspensions: (a) the cell culture in the early phase of cell number increase, (b) an enzyme mixture of 1%
Periodic deposition of arabinogalactan epitopes in the cell wall of pollen tubes of Nicotiana tabacum L.
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The monoclonal antibodies MAC 207 and JIM 8, recognizing arabinogalactan epitopes, were used to localize the corresponding antigenic sites in pollen tubes of Nicotiana tabacum L. grown in vitro or semi in vivo. The analysis of the immunofluorescence labelling was performed by means of confocal laser
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