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Página 1 desde 78 resultados
Effects of salinity and benzyl adenine on development and function of microhairs of Zea mays L.
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Bicellular microhairs are present on the surfaces of leaves of grasses with the exception of the Pooideae. In some halophytic grasses, these glandular hairs secrete salt, suggesting the intriguing question 'can the microhairs of grasses that do not normally encounter salinity also secrete salt?'
Nucleotide Metabolism in Salt-Stressed Zea mays L. Root Tips: I. Adenine and Uridine Nucleotides.
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Corn plants (Zea mays L. cv Pioneer 3906) were grown in a glass house on control and saline nutrient solutions, in winter and summer. There were two saline treatments, both with osmotic potential = -0.4 megapascal but with different Ca(2+)/Na(+) ratios: 0.03 and 0.73. Root tips and shoot meristems
Alternative splicing and differential expression of two transcripts of nicotine adenine dinucleotide phosphate oxidase B gene from Zea mays.
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With the exception of rice, little is known about the existence of respiratory burst oxidase homolog (rboh) gene in cereals. The present study reports the cloning and analysis of a novel rboh gene, termed ZmrbohB, from maize (Zea mays L.). The full-length cDNA of ZmrbohB encodes a 942 amino acid
Identification and characterization of a novel adenine phosphoribosyltransferase gene (ZmAPT2) from maize (Zea mays L.).
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Adenine phosphoribosyltransferase (APRT) is the key enzyme that converts adenine to adenosine monophosphate (AMP) in the purine salvage pathway. It was found that several different forms of APRT gene exist in plants, but no APRT gene in maize has been reported up to now. In this study, a novel maize
Nucleotide sequence of two cDNAs encoding the adenine nucleotide translocator from Zea mays L.
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Purification and characterization of the reconstitutively active adenine nucleotide carrier from maize mitochondria.
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The adenine nucleotide carrier from maize (Zea mays L. cv B 73) shoot mitochondria was solubilized with Triton X-100 and purified by sequential chromatography on hydroxyapatite and Matrex Gel Blue B in the presence of cardiolipin and asolectin. Sodium dodecyl sulfate-gel electrophoresis of the
Molecular and biochemical analysis of the plastidic ADP-glucose transporter (ZmBT1) from Zea mays.
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Physiological studies on the Brittle1 maize mutant have provided circumstantial evidence that ZmBT1 (Zea mays Brittle1 protein) is involved in the ADP-Glc transport into maize endosperm plastids, but up to now, no direct ADP-Glc transport mediated by ZmBT1 has ever been shown. The heterologous
The Involvement of Aspartate and Glutamate in the Decarboxylation of Malate by Isolated Bundle Sheath Chloroplasts from Zea mays.
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Aspartate or glutamate stimulated the rate of light-dependent malate decarboxylation by isolated Zea mays bundle sheath chloroplasts. Stimulation involved a decrease in the apparent K(m) (malate) and an increased maximum velocity of decarboxylation. In the presence of glutamate other dicarboxylates
Regulators of cell division in plant tissues : XVIII. Metabolism of zeatin in Zea mays seedlings.
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[(3)H] Zeatin was supplied to Zea mays L. seedlings with roots excised; the metabolites identified were adenosine-5'-phosphate, adenosine, adenine, and 7-glucosylzeatin (a minor metabolite). The principal metabolites formed from zeatin by the roots of intact Z. mays seedlings were
Purification, crystallization and preliminary X-ray diffraction study of a recombinant cytokinin oxidase from Zea mays.
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Cytokinins are hormones that are involved in plant growth and development. They are irreversibly degraded by cytokinin oxidases/dehydrogenases, flavoenzymes which contain a covalently bound flavine adenine dinucleotide (FAD) cofactor. Cytokinin oxidase from Zea mays (ZmCKO1) was overexpressed in the
Adenine nucleotide content of corn roots as affected by injury and subsequent washing.
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The adenine nucleotide content of the 2-centimeter segments excised from tray-grown corn (Zea mays L., WF9 x Mo17) roots declines for the first hour after excision. Concomitant with the loss of adenine nucleotides is a decline in respiration and a leakage of K(+). With continued washing, these
Bilevel disulfide group reduction in the activation of c(4) leaf nicotinamide adenine dinucleotide phosphate-malate dehydrogenase.
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The time course of thioredoxin-mediated reductive activation of isolated Zea mays nicotinamide adenine dinucleotide phosphatemalate dehydrogenase is highly sigmoidal in nature. We examined the factors affecting these kinetics, including the thiol-disulfide status of unactivated and activated forms
Two genes encode the adenine nucleotide translocator of maize mitochondria. Isolation, characterisation and expression of the structural genes.
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Southern blot hybridisation of maize (Zea mays) genomic DNA with a specific cDNA probe and sequence analysis of several cDNAs have revealed that the mitochondrial adenine nucleotide translocator (ADP/ATP carrier) is encoded by two genes, both of which are expressed in dark-grown coleoptile tissue.
Oxidation of reduced nicotinamide adenine dinucleotide phosphate by isolated corn mitochondria.
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Isolated corn (Zea mays L.) mitochondria were found to oxidize reduced nicotinamide adenine dinucleotide phosphate in a KCl reaction medium. This oxidation was dependent on the presence of calcium or phosphate or both. Strontium and manganese substituted for calcium, but magnesium or barium did not.
Characterization of small interfering RNAs derived from Rice black streaked dwarf virus in infected maize plants by deep sequencing.
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Rice black streaked dwarf virus (RBSDV) is the casual agent of maize rough dwarf disease, which frequently causes severe yield loss in China. However, the interaction between RBSDV and maize plants is largely unknown. RNA silencing is a conserved mechanism against viruses in plants. To understand
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