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Stran 1 iz 29 rezultatov
Polyamine Titer in the Embryonic Axis and Cotyledons of Glycine max (L.) during Seed Growth and Maturation.
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Active polyamine metabolism occurs in Glycine max (L.) seeds during development. Most (>/=97%) of putrescine (Put), spermidine (Spd), spermine (Spm), and cadaverine (Cad) are present as free forms in the growing embryo. In the cotyledon or embryonic axis, Put decreases to a nearly undetectable
Polyamine Anabolism in Germinating Glycine max (L.) Seeds : Dynamics of Cadaverine and Putrescine Formation in the Embryonic Axis.
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Active polyamine biosynthesis occurs in the embryonic axis, but not in the cotyledons, during germination of Glycine max (L.) cv Williams seeds and subsequent growth of the young seedlings. The hypocotyl and radicle synthesize and accumulate considerable amounts of cadaverine (Cad) and putrescine
[Relationship between chloride tolerance and polyamine accumulation in Glycine max, Glycine soja, and their hybrid seedlings].
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The seedlings of the F4 hybrid strain 'JB185' selected for salt tolerance generation by generation, their parents Glycine max cv. Jackson and Glycine soja population 'BB52' were treated with different NaCl concentrations and iso-osmotic (-0.53 MPa) PEG-6000, NaCl, Na+ (without Cl-) and Cl- (without
[Changes of polyamines level in Glycine soja and Glycine max seedlings under NaCl stress].
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With internationally common-used Glycine max (the salt-tolerant Lee68) and Glycine soja (the salt-sensitive N23232) as reference, this paper studied the polyamines (PAs) contents and polyamine oxidase (PAO) activities in the highly salt-tolerant BB52 (Glycine soja) seedlings, which showed that under
Polyamine synthesis in plants: isolation and characterization of spermidine synthase from soybean (Glycine max) axes.
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Spermidine synthase (EC 2.5.1.16) was purified to homogeneity for the cytosol of soybean (Glycine max) axes using ammonium sulfate fractionation and chromatography on DEAE-Sephacel, Sephacryl S-300, omega-aminooctyl-Sepharose and ATPA-Sepharose. The molecular mass of the enzyme estimated by gel
Release of Calcium from Suspension-Cultured Glycine max Cells by Chitosan, Other Polycations, and Polyamines in Relation to Effects on Membrane Permeability.
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Treatment with chitosan of suspension-cultured Glycine max cells labeled with (45)Ca(2+) caused a rapid release of calcium, which was complete much earlier than the chitosan-induced leakage of intracellular electrolytes and probably reflects calcium loss primarily from the cell wall and/or plasma
Natural polyamines inhibit soybean (Glycine max) lipoxygenase-1, but not the lipoxygenase-2 isozyme.
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Natural polyamines are shown to inhibit dioxygenase activity of soybean lipoxygenase-1, but they were ineffective toward the lipoxygenase-2 isozyme. The inhibitory power was dependent on the number of basic groups in the molecule, in the order spermine > spermidine > cadaverine >/= putrescine. Both
Polyamine synthesis in plants. Purification and properties of amidinotransferase from soybean (Glycine max) axes.
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Three-day-old soybean (Glycine max) seedlings were exposed to 0.4 M sorbitol solution for 4 h to induce amidinotransferase activity, with the corresponding enzyme being purified to homogeneity by chromatographic separation on DEAE-Sephacel, Sephacryl S-300 and L-arginine Sepharose 4B. The purified
Shoot-applied polyamines suppress nodule formation in soybean (Glycine max).
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In legumes, the number of root nodules is controlled by a mechanism called autoregulation. Recently, we found that the foliar brassinosteroid (BR), a plant growth-regulating hormone, systemically regulates the nodule number in soybean plants. In the present study we report that such down-regulation
Effect of drought stress at supraoptimal temperature on polyamine concentrations in transgenic soybean with increased proline levels.
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The effect of drought stress at supraoptimal temperature on free proline and polyamine levels was compared in wild type and transgenic soybean (Glycine max cv. Ibis) plants having increased proline levels. Since glutamate and arginine are precursors of both proline and polyamines, it was assumed
Effects of elevated CO2 concentration on the polyamine levels of field-grown soybean at three O3 regimes.
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Effects of increased ozone (O3) and carbon dioxide (CO2) on polyamine levels were determined in soybean (Glycine max L. Merr. cv. Clark) grown in open-top field chambers. The chamber treatments consisted of three O3 regimes equal to charcoal filtered (CF), non-filtered (NF), and non-filtered plus 40
Ornithine decarboxylase and arginine decarboxylase gene transcripts are co-localized in developing tissues of Glycine max etiolated seedlings.
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Unlike other eukaryotes, which synthesize polyamines (PA) only from ornithine, plants possess an additional pathway utilizing arginine as a precursor. In this study, we have identified cDNA clones coding for a Glycine max ornithine decarboxylase (ODC, EC 4.1.1.7) and an arginine decarboxylase (ADC,
Cadaverine, an Essential Diamine for the Normal Root Development of Germinating Soybean (Glycine max) Seeds.
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When the polyamine content of soybean (Glycine max) seeds was examined during the early stages of germination, the major polyamine in the cotyledons was found to be spermidine, followed by spermine; while very low concentrations of cadaverine were found. In the embryonic axes, however, cadaverine
Higher accumulation of gamma-aminobutyric acid induced by salt stress through stimulating the activity of diamine oxidases in Glycine max (L.) Merr. roots.
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Polyamines (PAs) are assumed to perform their functions through their oxidative product such as gamma-aminobutyric acid (GABA) formation. However, there is only limited information on the interrelation between PA degradation and GABA accumulation under salt stress. In order to reveal a quantitative
Purification and Properties of Arginase from Soybean, Glycine max, Axes.
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Arginase (EC 3.5.3.1) was purified to homogeneity from cytosol of soybean, Glycine max, axes by chromatographic separations on Sephadex G-200, DEAE-sephacel, hydroxyapatite, and arginine-affinity columns. The molecular weight of the enzyme estimated by pore gradient gel electrophoresis was 240,000,
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