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Pagina 1 a partire dal 16 risultati
Distribution and Properties of a Potassium-dependent Asparaginase Isolated from Developing Seeds of Pisum sativum and Other Plants.
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Asparaginase (EC 3.5.1.1) was isolated from the developing seed of Pisum sativum. The enzyme is dependent upon the presence of K(+) for activity, although Na(+) and Rb(+) may substitute to a lesser extent. Maximum activity was obtained at K(+) concentrations above 20 millimolar. Potassium ions
Stimulation by potassium ions of the growth of Rhizopus oligosporus during liquid-and solid-substrate fermentations.
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Soya beans and several other beans and cereals have been used as substrates for tempe fermentation with the fungus Rhizopus oligosporus Saito. Except for the presence of alkaloids, the chemical composition of lupins (Lupinus mutabilis Sweet) is similar to that of soya beans. Therefore the potential
[Relations between potassium nutrition and limestone chlorosis in Lupinus albus L].
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INFLUENCE OF ACETIC, PROPIONIC, NORMAL BUTYRIC AND SULPHURIC ACIDS AND POTASSIUM ACETATE ON ELONGATION OF PRIMARY ROOTS OF SEEDLINGS OF WHITE LUPINE.
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[Separation of leghemoglobin from the nodules of lupine, Lupinus luteus L., into components].
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The crude leghaemoglobin suspension from root nodules of yellow lupine (Lupinus luteus L.) was separated into five fractions: I, IIa and IIb, IIIa and IIIb using the chromatography on DEAE-cellulose (numbered following the elution order). The visible absorption spectra show that fractions I, IIa and
Expression, purification and catalytic activity of Lupinus luteus asparagine beta-amidohydrolase and its Escherichia coli homolog.
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We describe the expression, purification, and biochemical characterization of two homologous enzymes, with amidohydrolase activities, of plant (Lupinus luteus potassium-independent asparaginase, LlA) and bacterial (Escherichia coli, ybiK/spt/iaaA gene product, EcAIII) origin. Both enzymes were
Enrichment of gluten-free cakes with lupin (Lupinus albus L.) or buckwheat (Fagopyrum esculentum M.) flours.
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In the present study, the effect of debittered lupin flour (LF) and whole buckwheat flour (BF) on the nutritional and sensory quality of gluten-free cake was studied. LF (10, 20, 30 and 40%) and BF (5, 10, 15 and 20%) were partially replaced with corn starch and rice flour mixture (1:1 w/w) in the
LaALMT1 mediates malate release from phosphorus-deficient white lupin root tips and metal root to shoot translocation.
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Under phosphorus (P) deficiency, Lupinus albus (white lupin) releases large amounts of organic acid anions from specialized root structures, so-called cluster or proteoid roots, to mobilize and acquire sparingly soluble phosphates from a restricted soil volume. The molecular mechanisms underlying
Evidence of phloem boron transport in response to interrupted boron supply in white lupin (Lupinus albus L. cv. Kiev Mutant) at the reproductive stage.
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The present study investigates whether previously acquired boron (B) in mature leaves in white lupin can be retranslocated into the rapidly growing young reproductive organs, in response to short-term (3 d) interrupted B supply. In a preliminary experiment with white lupin in soil culture, B
Characterization of the peribacteroid membrane ATPase of lupin root nodules.
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Peribacteroid membranes can be isolated in essentially pure form from 20-day lupin root nodules by osmotic shock of the purified membrane enclosed bacteroids. The ATPase (EC 3.6.1.3) associated with this membrane has an acid pH optimum (5.25) and is specific for ATP (Mg-ATP Km = 0.16 mM). The enzyme
Differential alkali-extraction of hemicellulose and hydroxyproline from non-delignified cell walls of lupin hypocotyls.
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The extraction by alkali of hemicellulose polysaccharides and polymer hydroxyproline from non-delignified, primary cell-walls of lupin hypocotyls has been studied, using sequential extractions at 0 degrees and 18-22 degrees. 10% Aqueous potassium hydroxide at 0 degrees rapidly removed about
Effect of Varieties on Bioactive Properties and Mineral Contents of Some Sorghum, Millet and Lupin Seeds.
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In this study, some physico-chemical properties, amino acids, fatty acids, sugars and mineral contents of sorghum, millet and lupin seeds. Sorghum (red, white and yellow) and millet seeds were purchased from market in Saudi Arabia (Riyadh). Lupin seeds were provided from in Turkey (Konya). Protein
[Properties of metlegoglobin reductase from lupin root nodules].
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The interaction between metlegoglobin reductase from lupin root nodules cytosol and some substrates and inhibitors was studied. The Km values for electron acceptors: dichlorophenol indophenol, potassium ferricyanide, methylene blue and cytochrome c were 5.7 x 10(-5), 2.1 x 10(-5), 1.75 x 10(-4) and
Role of asparaginase variable loop at the carboxyl terminal of the alpha subunit in the determination of substrate preference in plants.
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Structural determinants responsible for the substrate preference of the potassium-independent (ASPGA1) and -dependent (ASPGB1) asparaginases from Arabidopsis thaliana have been investigated. Like ASPGA1, ASPGB1 was found to be catalytically active with both L: -Asn and β-Asp-His as substrates,
Plant community richness and microbial interactions structure bacterial communities in soil.
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Plant species, plant community diversity and microbial interactions can significantly impact soil microbial communities, yet there are few data on the interactive effects of plant species and plant community diversity on soil bacterial communities. We hypothesized that plant species and plant
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