nicotiana velutina/carbohydrate

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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

Influence of Plant Growth at High CO2 Concentrations on Leaf Content of Ribulose-1,5-Bisphosphate Carboxylase/Oxygenase and Intracellular Distribution of Soluble Carbohydrates in Tobacco, Snapdragon, and Parsley.

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We have examined the possible role of leaf cytosolic hexoses and the expression of mannitol metabolism as mechanisms that may affect the repression of photosynthetic capacity when plants are grown at 1000 versus 380 [mu]L L-1 CO2. In plants grown at high CO2, leaf ribulose-1,5-bisphosphate

Assessment of an apparent relationship between availability of soluble carbohydrates and reduced nitrogen during floral initiation in tobacco.

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Daily relative accumulation rate of soluble carbohydrates (RARS) and reduced nitrogen (RARN) in the shoot, as estimates of source strength, were compared with daily relative growth rates (RGR) of the shoot, as an estimate of sink demand, during floral transformation in apical meristems of tobacco

Carbohydrates Stimulate Ethylene Production in Tobacco Leaf Discs : II. Sites of Stimulation in the Ethylene Biosynthesis Pathway.

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Galactose, sucrose, and glucose (50 millimolar) applied to tobacco leaf discs (Nicotiana tabacum L. cv ;Xanthi') during a prolonged incubation (5-6 d) markedly stimulated ethylene production which, in turn, could be inhibited by aminoethoxyvinylglycine (2-amino-4-(2'-aminoethoxy)-trans-3-butenoic

Carbohydrate moiety of the Petunia inflata S3 protein is not required for self-incompatibility interactions between pollen and pistil.

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For Petunia inflata and Nicotiana alata, which display gametophytic self-incompatibility, S proteins (the products of the multiallelic S gene in the pistil) have been shown to control the pistil's ability to recognize and reject self-pollen. The biochemical mechanism for rejection of self-pollen by

Limitation of tobacco callus tissue growth by carbohydrate availability.

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Growth rate, maximum dry weight yield, and carbohydrate utilization were measured with pith callus derived from Nicotiana tabacum L. var. Wisconsin No. 38. Maximum tissue dry weights increased as carbohydrate (either glucose or sucrose) in the medium was increased. The time at which maximum growth

Overexpression of NtSnRK2.2 enhances salt tolerance in Nicotiana tabacum by regulating carbohydrate metabolism and lateral root development.

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SnRK2 is a plant-specific protein kinase family implicated in environmental stress tolerance. Individual SnRK2 genes have acquired distinct regulatory properties in response to various environmental stresses. In this study, NtSnRK2.2, a SnRK2 subclass II member in Nicotiana tabacum L., was cloned

Disturbance in the allocation of carbohydrates to regenerative organs in transgenic Nicotiana tabacum L.

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Transgenic tobacco (Nicotiana tabacum L, cv. SR-1) expressing mannitol 1-phosphate dehydrogenase, MTLD, in chloroplasts and myo-inositol O-methyltransferase, IMT1, in the cytosol after crossing of lines which expressed these foreign genes separately has been analysed. Plants expressing both enzymes

Increasing the carbohydrate storage capacity of plants by engineering a glycogen-like polymer pool in the cytosol.

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Global demand for higher crop yields and for more efficient utilization of agricultural products will grow over the next decades. Here, we present a new concept for boosting the carbohydrate content of plants, by channeling photosynthetically fixed carbon into a newly engineered glucose polymer

Effects of Altered Carbohydrate Availability on Whole-Plant Assimilation of NO(3).

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An experiment was conducted to investigate the relative changes in NO(3) (-) assimilatory processes which occurred in response to decreasing carbohydrate availability. Young tobacco plants (Nicotiana tabacum [L.], cv NC 2326) growing in solution culture were exposed to 1.0 millimolar (15)NO(3) (-)

Carbohydrates stimulate ethylene production in tobacco leaf discs : I. Interaction with auxin and the relation to auxin metabolism.

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Various naturally occurring carbohydrates, applied at a concentration range of 1 to 100 mm, stimulated ethylene production for several days in indoleacetic acid (IAA)-treated or untreated tobacco (Nicotiana tabacum L. cv ;Xanthi') leaf discs. The lag period for this sugar-stimulated ethylene

Promiscuous, non-catalytic, tandem carbohydrate-binding modules modulate the cell-wall structure and development of transgenic tobacco (Nicotiana tabacum) plants.

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We have compared heterologous expression of two types of carbohydrate binding module (CBM) in tobacco cell walls. These are the promiscuous CBM29 modules (a tandem CBM29-1-2 and its single derivative CBM29-2), derived from a non-catalytic protein1, NCP1, of the Piromyces equi cellulase/hemicellulase

Altered activity of the P2 isoform of plastidic glucose 6-phosphate dehydrogenase in tobacco (Nicotiana tabacum cv. Samsun) causes changes in carbohydrate metabolism and response to oxidative stress in leaves.

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Expression of one specific isoform of plastidic glucose 6-phosphate dehydrogenase (G6PDH) was manipulated in transgenic tobacco. Antisense and sense constructs of the endogenous P2 form of G6PDH were used to transform plants under the control of the cauliflower mosaic virus (CaMV) 35S promotor.

Melatonin redirects carbohydrates metabolism during sugar starvation in plant cells.

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Recent studies have shown that melatonin is an important molecule in plant physiology. It seems that the most important is that melatonin efficacy eliminates oxidative stress (direct and indirect antioxidant) and moreover induce plant stress reaction and switch on different defence strategies

Structural analysis of the carbohydrate moiety of arabinogalactan-proteins from stigmas and styles of Nicotiana alata.

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Arabinogalactan-proteins (AGPs) from the female reproductive tissues (stigmas and styles) of Nicotiana alata were isolated from the saturated ammonium sulfate supernatant of buffer-soluble extracts by precipitation with the beta-glucosyl Yariv reagent, followed by gel-filtration chromatography under

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