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Characterization of Acetate and Pyruvate Metabolism in Suspension Cultures of Zea mays by C NMR Spectroscopy.

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Carbon-13 nuclear magnetic resonance (NMR) spectroscopy has been applied to the direct observation of acetate and pyruvate metabolism in suspension cultures of Zea mays (var Black Mexican Sweet). Growth of the corn cells in the presence of 2 millimolar [2-(13)C]acetate resulted in a rapid uptake of

Molecular cloning and expression in Escherichia coli of an active fused Zea mays L. D-amino acid oxidase.

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D-Amino acid oxidase (DAAO) is an FAD-dependent enzyme that metabolizes D-amino acids in microbes and animals. However, such ability has not been identified in plants so far. We predicted a complete DAAO coding sequence consisting of 1158 bp and encoding a protein of 386 amino acids. We cloned this

The Ameliorative Effect of Silicon on Maize Plants Grown in Mg-Deficient Conditions.

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The importance of magnesium (Mg) for plant growth is well-documented. Silicon (Si)-mediated alleviation of mineral deficiencies has been also reported in a number of plant species; however, there is no report on the relevance of Si nutrition in plants grown in Mg-deficient condition. Therefore, in

Relative contribution of LOX10, green leaf volatiles and JA to wound-induced local and systemic oxylipin and hormone signature in Zea mays (maize).

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Green leaf volatiles (GLVs) and jasmonates (JAs) are the best-characterized groups of fatty acid-derived oxylipin signals that regulate wound-associated defenses. Beyond these two major groups of defense signals, plants produce an array of oxylipins in response to wounding, which possess potent

Combining metabolite profiling with genome-wide association study to reveal response mechanisms of Zea mays seedlings under low-phosphorus conditions.

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Inorganic phosphorus (Pi) is an essential element in numerous metabolic reactions and signaling pathways, but the molecular details of these pathways remain largely unknown. In this study, metabolite profiles of maize (Zea mays L.) leaves and roots were compared between six low-Pi sensitive lines

Sequence in which the amino acids on corn (Zea mays) become limiting for growing rats.

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Three 21-day feeding experiments were conducted to determine the sequence in which the amino acids of corn become limiting for the growth of young rats. Diets consisted of corn fortified with minerals and vitamins, and supplemented with various combinations of essential amino acids. On the basis of

Biochemical composition of maize (Zea mays L.) pollen : III. Effects of allele X storage interactions at the waxy(wx), sugary (su 1) and shrunken (sh 2) loci on the amino acid content.

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Pollen grains containing either the Wx, wx, Su 1, su 1, Sh 2 or sh 2 alleles were stored at 0, 1, 2, 3, 4 and 5 days at 2 °C. After each storage period, a portion of pollen from each genotype was analyzed for free amino acid content. Over all genotypes, storage significantly altered the content of

Molecular cloning and further characterization of a probable plant vacuolar sorting receptor.

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BP-80 is a type I integral membrane protein abundant in pea (Pisum sativum) clathrin-coated vesicles (CCVs) that binds with high affinity to vacuole-targeting determinants containing asparagine-proline-isoleucine-arginine. Here we present results from cDNA cloning and studies of its intracellular

Phytotoxicity of Acetohydroxyacid Synthase Inhibitors Is Not Due to Accumulation of 2-Ketobutyrate and/or 2-Aminobutyrate.

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Acetohydroxyacid synthase (AHAS) is the site of action of herbicides of different chemical classes, such as imidazolinones, sulfonylureas, and triazolopyrimidines. Inhibition of AHAS causes the accumulation of 2-ketobutyrate (2-KB) and 2-aminobutyrate (2-AB) (the transamination product of 2-KB), and

Lysine-insensitive aspartate kinase in two threonine-overproducing mutants of maize.

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Aspartate kinase (AK; EC 2.7.2.A) catalyzes the first reaction in the biosynthesis pathway for aspartate-derived amino acids in plants. Aspartate kinase was purified from wildtype and two maize (Zea mays L.) genotypes carrying unlinked dominant mutations,Ask LT19 andAsk2 -LT20, that conferred

Isolation and characterization of two homoserine dehydrogenases from maize suspension cultures.

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Homoserine dehydrogenase in unpurified extracts of maize (Zea mays L.) cell suspensions is inhibited 73% by the feedback regulator threonine; the remaining 27% of the total activity is not affected even by high concentrations of threonine. The threonine-resistant and threonine-sensitive homoserine

Selection and characterization of a feedback-insensitive tissue culture of maize.

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Tissue culture selection techniques were used to isolate a maize (Zea mays L.) variant D33, in which the aspartate family pathway was less sensitive to feedback inhibition by lysine. D33 was recovered by successively subculturing cultures originally derived from immature embryos on MS medium

A Spontaneous Complementary Mutation Restores the RNA Silencing Suppression Activity of HC-Pro and the Virulence of Sugarcane Mosaic Virus

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Cross-protection is a promising measure to control plant viral diseases. Reverse genetics had been recently adopted to generate attenuated mutants that have potential in cross-protection. But studies on the variability of the progeny viruses of the attenuated mutants are scarce. Sugarcane mosaic

Multicollinearity in canonical correlation analysis in maize.

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The objective of this study was to evaluate the effects of multicollinearity under two methods of canonical correlation analysis (with and without elimination of variables) in maize (Zea mays L.) crop. Seventy-six maize genotypes were evaluated in three experiments, conducted in a randomized block

Mapping and Functional Analysis of a Maize Silkless Mutant sk-A7110.

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The maize (Zea mays) stigma, which is commonly known as silk, is indispensable for reproduction and thus for grain yield. Here, we isolated a spontaneous mutant sk-A7110, which completely lacks silk; scanning electron microscopy showed that the sk-A7110 pistils degenerated during late floret

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