galacturonic acid/mayi

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The Conversion of d-Glucose-6-C to Cell Wall Polysaccharide Material in Zea mays in Presence of High Endogenous Levels of Myoinositol.

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When corn (Zea mays) roots are supplied with high concentrations of unlabeled myoinositol, the conversion of d-glucose-6-(14)C to cell wall galacturonic acid is significantly reduced compared to controls, although its incorporation into cell wall glucosyl units remains unchanged. This suggests that,

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

Enzymic Analysis of Feruloylated Arabinoxylans (Feraxan) Derived from Zea mays Cell Walls : II. Fractionation and Partial Characterization of Feraxan Fragments Dissociated by a Bacillus subtilis Enzyme (Feraxanase).

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Structural features of feruloylated arabinoxylan (feraxan) present in Zea mays L. (hybrid B 73 x Mo 17) coleoptile cell walls have been studied using a purified feraxan-dissociating enzyme (feraxanase) and an alpha-arabinofuranosidase. This experimental approach has demonstrated the following. (a)

Structural characterization of an arabinoxylan-rhamnogalacturonan complex from cell walls of Zea shoots.

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An arabinoxylan-rhamnogalacturonan complex, comprised of galacturonic acid, rhamnose, arabinose, xylose, and galactose in the ratios 75.9:4.6:5.2:3.5:5.4 and lesser amounts of other constituents, was dissociated from the water-insoluble matrix of cell walls of Zea mays by xylanase and

Partial chemical characterization of corn root cell walls.

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The present study reports on chemical changes which occur in the cell wall of Zea mays during early phases of growth. Roots of seedling corn plants were divided into a meristematic zone, the zone of elongation, and the maturation zone, and the cell wall isolated from each of these zones. The wall

Occurrence and properties of polygalacturonase in Avena and other plants.

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Polygalacturonase activity has been detected in a number of plants including seedlings of Phaseolus vulgaris, Zea mays, Avena sativa, and Pisum sativum. Particular emphasis was placed on characterizing the enzyme from oat seedlings. This enzyme is solubilized by 0.2 m NaCl, and its activity is

Identification of polysaccharide hydrolases involved in autolytic degradation of zea cell walls.

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Cell walls of Zea mays (cv L.G.11) seedlings labeled with (14)C were treated with alpha-amylase from Bacillus subtilis to remove starch and mixed linkage glucans. These walls released arabinose, xylose, galactose, and galacturonic acid in addition to glucose when they were allowed to autolyze.

Wound-Induced Changes of Membrane Voltage, Endogenous Currents, and Ion Fluxes in Primary Roots of Maize.

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The effects of mechanical wounding on membrane voltage, endogenous ion currents, and ion fluxes were investigated in primary roots of maize (Zea mays) using intracellular microelectrodes, a vibrating probe, and ion-selective electrodes. After a wedge-shaped wound was cut into the proximal elongation

Changes in Esterification of the Uronic Acid Groups of Cell Wall Polysaccharides during Elongation of Maize Coleoptiles.

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Cell walls of grasses have two major polysaccharides that contain uronic acids, the hemicellulosic glucuronoarabinoxylans and the galactosyluronic acid-rich pectins. A technique whereby esterified uronic acid carboxyl groups are reduced selectively to yield their respective 6,6-dideuterio neutral

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