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15 Ergebnisse
Enzymes of alpha,alpha-Trehalose Metabolism in Soybean Nodules.
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Metabolism of trehalose, alpha,d-glucopyranosyl-alpha,d-glucopyranoside, was studied in nodules of Bradyrhizobium japonicum-Glycine max [L.] Merr. cv Beeson 80 symbiosis. The nodule extract was divided into three fractions: bacteroid soluble protein, bacteroid fragments, and cytosol. The bacteroid
Enzymes of sucrose, maltose, and α,α-trehalose catabolism in soybean root nodules.
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Crude, Sephadex-filtered extracts of soybean (Glycine max (L.) Merr.) root nodules contained invertase (E.C. 3.2.1.26) activity with pH optima at 5.4 and 7.8, α,α-trehalase (E.C. 3.2.1.28) activity with pH optima at 3.8 and 6.6, and maltase (E.C. 3.2.1.20) activity with a broad pH optimum between
Timecourse microarray analyses reveal global changes in gene expression of susceptible Glycine max (soybean) roots during infection by Heterodera glycines (soybean cyst nematode).
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Changes in gene expression within roots of Glycine max (soybean), cv. Kent, susceptible to infection by Heterodera glycines (the soybean cyst nematode [SCN]), at 6, 12, and 24 h, and 2, 4, 6, and 8 days post-inoculation were monitored using microarrays containing more than 6,000 cDNA inserts.
Metabolic and structural rearrangement during dark-induced autophagy in soybean (Glycine max L.) nodules: an electron microscopy and 31P and 13C nuclear magnetic resonance study.
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The effects of dark-induced stress on the evolution of the soluble metabolites present in senescent soybean (Glycine max L.) nodules were analysed in vitro using (13)C- and (31)P-NMR spectroscopy. Sucrose and trehalose were the predominant soluble storage carbons. During dark-induced stress, a
An overview of the metabolic differences between Bradyrhizobium japonicum 110 bacteria and differentiated bacteroids from soybean (Glycine max) root nodules: an in vitro 13C- and 31P-nuclear magnetic resonance spectroscopy study.
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Bradyrhizobium japonicum is a symbiotic nitrogen-fixing soil bacteria that induce root nodules formation in legume soybean (Glycine max.). Using (13)C- and (31)P-nuclear magnetic resonance (NMR) spectroscopy, we have analysed the metabolite profiles of cultivated B. japonicum cells and bacteroids
Effect of trehalose on survival of Bradyrhizobium japonicum during desiccation.
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OBJECTIVE
A major reason for the ineffectiveness of legume inoculants in the field is the rapid death of rhizobia because of desiccation. The major purpose of this study was to identify conditions under which alpha,alpha-trehalose would improve survival of Bradyrhizobium japonicum during
Factors affecting the survival of Bradyrhizobium applied in liquid cultures to soya bean [Glycine max (L.) Merr.] seeds.
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OBJECTIVE
To determine the impact of medium composition, bacterial strain, trehalose accumulation, and relative humidity during seed storage on the survival of Bradyrhizobium japonicum on soya bean [Glycine max (L.) Merr.] seeds.
RESULTS
Bacteria in liquid cultures were applied to seeds, and the
Wildfire of Soybean Caused by Pseudomonas syringae pv. tabaci, a New Disease in Korea.
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In 2006 and 2007, a new bacterial disease was observed in field-cultivated soybeans in Boeun District and Munkyung City of Korea. The disease caused severe blighting of soybean (Glycine max) leaves. Soybean leaves in fields showed yellowish spots with brown centers. Brown and dead areas of variable
First Report of Pseudomonas cichorii Associated with Leaf Spot on Soybean in South Korea.
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Unusual symptoms were observed on 5% of the soybean (Glycine max (L.) Merill) plants in commercial fields in South Korea in September 2008 and 2009. The lesions were at first water soaked, then enlarged and turned dark brown or black, often with concentric white rings and sometimes surrounded by a
Purification of the trehalase GMTRE1 from soybean nodules and cloning of its cDNA. GMTRE1 is expressed at a low level in multiple tissues.
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Trehalose (alpha-D-glucopyranosyl-1,1-alpha-D-glucopyranoside), a disaccharide widespread among microbes and lower invertebrates, is generally believed to be nonexistent in higher plants. However, the recent discovery of Arabidopsis genes whose products are involved in trehalose synthesis has
Molecular processes underlying the floral transition in the soybean shoot apical meristem.
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The transition to flowering is characterized by a shift of the shoot apical meristem (SAM) from leaf production to the initiation of a floral meristem. The flowering process is of vital importance for agriculture, but the associated events or regulatory pathways in the SAM are not well understood,
Metabolism of C-labeled photosynthate and distribution of enzymes of glucose metabolism in soybean nodules.
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The metabolism of translocated photosynthate by soybean (Glycine max L. Merr.) nodules was investigated by (14)CO(2)-labeling studies and analysis of nodule enzymes. Plants were exposed to (14)CO(2) for 30 minutes, followed by (12)CO(2) for up to 5 hours. The largest amount of radioactivity in
Carbohydrates in Soybean Nodules: II. DISTRIBUTION OF COMPOUNDS IN SEEDLINGS DURING THE ONSET OF NITROGEN FIXATION.
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During the first few days of nitrogen fixation activity by soybean (Glycine max (L.) Merr) root nodules, d-chiro-inositol, myo-inositol, sucrose, alpha,alpha-trehalose, and maltose accumulate rapidly and reach concentrations several fold greater than concentrations in other plant organs.
Carbohydrate, organic Acid, and amino Acid composition of bacteroids and cytosol from soybean nodules.
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Metabolites in Bradyrhizobium japonicum bacteroids and in Glycine max (L.) Merr. cytosol from root nodules were analyzed using an isolation technique which makes it possible to estimate and correct for changes in concentration which may occur during bacteroid isolation. Bacteroid and cytosol
Soybean metabolites regulated in root hairs in response to the symbiotic bacterium Bradyrhizobium japonicum.
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Nodulation of soybean (Glycine max) root hairs by the nitrogen-fixing symbiotic bacterium Bradyrhizobium japonicum is a complex process coordinated by the mutual exchange of diffusible signal molecules. A metabolomic study was performed to identify small molecules produced in roots and root hairs
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