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Pàgina 1 des de 22 resultats
Inositol Metabolism in Plants. V. Conversion of Myo-inositol to Uronic Acid and Pentose Units of Acidic Polysaccharides in Root-tips of Zea mays.
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The metabolism of myo-inositol-2-(14)C, d-glucuronate-1-(14)C, d-glucuronate-6-(14)C, and l-methionine-methyl-(14)C to cell wall polysaccharides was investigated in excised root-tips of 3 day old Zea mays seedlings. From myo-inositol, about one-half of incorporated label was recovered in ethanol
Changes in Levels of Intermediates of the C(4) Cycle and Reductive Pentose Phosphate Pathway under Various Concentrations of CO(2) in Maize Leaves.
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The rate of CO(2) assimilation and levels of metabolites of the C(4) cycle and reductive pentose phosphate pathway in an attached leaf of maize (Zea mays L) were measured over a range of intercellular CO(2) concentration (Ci) of 10 to 190 microliters per liter. The CO(2) assimilation rate was
Changes in Levels of Intermediates of the C(4) Cycle and Reductive Pentose Phosphate Pathway during Induction of Photosynthesis in Maize Leaves.
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Changes in the level of metabolites of the C(4) cycle and reductive pentose phosphate (RPP) pathway were measured simultaneously with induction of photosynthesis in maize (Zea mays L.) to evaluate what may limit carbon assimilation during induction in a C(4) plant.After 20 minutes in the dark, there
Changes in Levels of Intermediates of the C(4) Cycle and Reductive Pentose Phosphate Pathway under Various Light Intensities in Maize Leaves.
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The rate of CO(2) assimilation and levels of metabolites of the C(4) cycle and reductive pentose phosphate pathway in attached leaves of maize (Zea mays L.) were measured over a range of light intensity from 0 to 1,900 microEinsteins per square meter per second under a saturated CO(2) concentration
Evaluation of protein pattern changes in roots and leaves of Zea mays plants in response to nitrate availability by two-dimensional gel electrophoresis analysis.
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BACKGROUND
Nitrogen nutrition is one of the major factors that limit growth and production of crop plants. It affects many processes, such as development, architecture, flowering, senescence and photosynthesis. Although the improvement in technologies for protein study and the widening of gene
UDP-glucose dehydrogenases of maize: a role in cell wall pentose biosynthesis.
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UDPGDH (UDP-D-glucose dehydrogenase) oxidizes UDP-Glc (UDP-D-glucose) to UDP-GlcA (UDP-D-glucuronate), the precursor of UDP-D-xylose and UDP-L-arabinose, major cell wall polysaccharide precursors. Maize (Zea mays L.) has at least two putative UDPGDH genes (A and B), according to sequence similarity
Hexachlorophene induced alterations in brain carbohydrate metabolism of Wistar rat.
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Effect of repeated oral administration of hexachlorophene (HCP) on glycolytic and oxidative pathways was studied in the rat brain. The rats were divided into three batches of six in each batch. The first batch was treated with paralytic dose (60 mg.kg-1.day-1) of HCP for 7 days. The second batch of
Changes in photosynthesis and respiratory metabolism of maize seedlings growing under low temperature stress may be regulated by arbuscular mycorrhizal fungi
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Arbuscular mycorrhizal fungi as an important soil microbe have been demonstrated to mitigate the harmful effects of stress on plants. However, little is known about the molecular mechanisms underlying the AM symbiotic response to low temperature. Here, differentially expressed genes (DEGs) in the
Localization of the C4 and C 3 pathways of photosynthesis in the leaves of Pennisetum purpureum and other C4 species. Insignificance of phenol oxidase.
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Mesophyll protoplasts and bundle-sheath cells of Pennisetum purpureum Schum., a C4 plant with low phenol-oxidase activity, were enzymatically separated according to methods recently developed with sugarcane (Saccharum officinarum L.), maize (Zea mays L.), and sorghum (Sorghum bicolor L.). The
A study of the rate of recycling of triose phosphates in heterotrophic Chenopodium rubrum cells, potato tubers, and maize endosperm.
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We have investigated whether starch accumulation in heterotrophic cell-suspension cultures of Chenopodium rubrum L., developing potato (Solarium tuberosum L.) tubers or maize (Zea mays L.) endosperm involves import of triose phosphates or of hexose units into the plastid, and whether there is a
Pyruvate orthophosphate dikinase of c(3) seeds and leaves as compared to the enzyme from maize.
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Pyruvate orthophosphate dikinase (PPDK) was found in various immature seeds of C(3) plants (wheat, pea, green bean, plum, and castor bean), in some C(3) leaves (tobacco, spinach, sunflower, and wheat), and in C(4) (maize) kernels. The enzyme in the C(3) plants cross-reacts with rabbit antiserum
Starch biosynthesis and intermediary metabolism in maize kernels. Quantitative analysis of metabolite flux by nuclear magnetic resonance.
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The seeds of cereals represent an important sink for metabolites during the accumulation of storage products, and seeds are an essential component of human and animal nutrition. Understanding the metabolic interconversions (networks) underpinning storage product formation could provide the
Comparative Proteomic and Morpho-Physiological Analyses of Maize Wild-Type Vp16 and Mutant vp16 Germinating Seed Responses to PEG-Induced Drought Stress.
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Drought stress is a major abiotic factor compromising plant cell physiological and molecular events, consequently limiting crop growth and productivity. Maize (Zea mays L.) is among the most drought-susceptible food crops. Therefore, understanding the mechanisms underlying drought-stress
Structural and kinetic characterization of a maize aldose reductase.
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The aldo-keto reductases (AKRs) are classified as oxidoreductases and are found in organisms from prokaryotes to eukaryotes. The AKR superfamily consists of more than 120 proteins that are distributed throughout 14 families. Very few plant AKRs have been characterized and their biological functions
Tracing cell wall biogenesis in intact cells and plants : selective turnover and alteration of soluble and cell wall polysaccharides in grasses.
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Cells of proso millet (Panicum miliaceum L. cv Abarr) in liquid culture and leaves of maize seedlings (Zea mays L. cv LH51 x LH1131) readily incorporated d-[U-(14)C]glucose and l-[U-(14)C]arabinose into soluble and cell wall polymers. Radioactivity from arabinose accumulated selectively in polymers
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