arabinoxylan/zea mays

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Enzymic Analysis of Feruloylated Arabinoxylans (Feraxan) Derived from Zea mays Cell Walls : III. Structural Changes in the Feraxan during Coleoptile Elongation.

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Changes in structural features of feraxan (feruloylated arabinoxylans) in cell walls during development of maize (Zea mays L.) coleoptiles were investigated by analysis of fragments released by feraxanase, a specific enzyme purified from Bacillus subtilis. The following patterns were identified: (a)

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)

Enzymic Analysis of Feruloylated Arabinoxylans (Feraxan) Derived from Zea mays Cell Walls I : Purification of Novel Enzymes Capable of Dissociating Feraxan Fragments from Zea mays Coleoptile Cell Wall.

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Three novel beta-xylan xylanohydrolases capable of dissociating ferulated arabinoxylan (Feraxan) from maize (Zea mays L. hybrid B73 x Mo17) coleoptile sections and two conventional beta-xylan xylanohydrolases (xylanases) were purified from a Bacillus subtilis industrial enzyme preparation (Novo Ban

Structural differences among alkali-soluble arabinoxylans from maize (Zea mays), rice (Oryza sativa), and wheat (Triticum aestivum) brans influence human fecal fermentation profiles.

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Human fecal fermentation profiles of maize, rice, and wheat bran and their dietary fiber fractions released by alkaline-hydrogen peroxide treatment (principally arabinoxylan) were obtained with the aim of identifying and characterizing fractions associated with high production of short chain fatty

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

Extracellular cross-linking of maize arabinoxylans by oxidation of feruloyl esters to form oligoferuloyl esters and ether-like bonds.

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Primary cell walls of grasses and cereals contain arabinoxylans with esterified ferulate side chains, which are proposed to cross-link the polysaccharides during maturation by undergoing oxidative coupling. However, the mechanisms and control of arabinoxylan cross-linking in vivo are unclear.

Quantitative Profiling of Feruloylated Arabinoxylan Side-Chains from Graminaceous Cell Walls.

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Graminaceous arabinoxylans are distinguished by decoration with feruloylated monosaccharidic and oligosaccharidic side-chains. Although it is hypothesized that structural complexity and abundance of these feruloylated arabinoxylan side-chains may contribute, among other factors, to resistance of

Intraprotoplasmic and wall-localised formation of arabinoxylan-bound diferulates and larger ferulate coupling-products in maize cell-suspension cultures.

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Maize (Zea mays L.) cell cultures incorporated radioactivity from [14C]cinnamate into hydroxycinnamoyl-CoA derivatives and then into polysaccharide-bound feruloyl residues. Within 5-20 min, the CoA pool had lost its 14C by turnover and little or no further incorporation into polysaccharides then

Structural Analysis of Secreted Root Slime from Maize (Zea mays L.).

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Secreted slime isolated from the incubation medium of Zea mays roots maintained axenically contains fucose, arabinose, xylose, galactose, and glucose as the major monosaccharides. The slime preparation contains low levels (3% weight/weight [w/w]) of uronic acids. Methylation analysis reveals an

Husks of Zea mays as a potential source of biopolymers for food additives and materials' development.

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Maize husks, an agricultural and industrial residue generated in a large volume, were investigated as a potential source of useful biopolymers. Thus, their chemical composition was firstly studied, after which two biopolymer products were obtained and characterized. Maize husks were dried and

Altered lignin biosynthesis improves cellulosic bioethanol production in transgenic maize plants down-regulated for cinnamyl alcohol dehydrogenase.

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Cinnamyl alcohol dehydrogenase (CAD) is a key enzyme involved in the last step of monolignol biosynthesis. The effect of CAD down-regulation on lignin production was investigated through a transgenic approach in maize. Transgenic CAD-RNAi plants show a different degree of enzymatic reduction

Characterization of feruloyl esterases in maize pollen.

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Ferulic acid esterases have been identified and partially purified from maize pollen. Results suggest that maize pollen FAEs may play an important role in pollen fertilization. A critical step in maize (Zea mays) seed production involves fertilization of the ovule by pollen, a process that relies on

Integrated extrusion-enzymatic treatment of corn bran for production of functional cake.

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Corn bran, as one of the high-fructose corn syrup industries' by-products, is a rich source of functional fibers. The major fraction of corn bran is insoluble arabinoxylan having lower functional properties than the minor soluble function. Therefore, the main aim of this research was to increase the

Comparing corn types for differences in cell wall characteristics and p-coumaroylation of lignin.

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This study was undertaken to compare cell wall characteristics including levels of p-coumarate (pCA) and lignin in corn (Zea mays L.) types. Five different types of corn, four commercial and Teosinte, were grown in the greenhouse in individual pots. For each corn type replicate stems were harvested

Early cell-wall modifications of maize cell cultures during habituation to dichlobenil.

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Studies involving the habituation of plant cell cultures to cellulose biosynthesis inhibitors have achieved significant progress as regards understanding the structural plasticity of cell walls. However, since habituation studies have typically used high concentrations of inhibitors and long-term

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