phosphoglucomutase/arabidopsis thaliana

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Alterations in Growth, Photosynthesis, and Respiration in a Starchless Mutant of Arabidopsis thaliana (L.) Deficient in Chloroplast Phosphoglucomutase Activity.

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A mutant of Arabidopsis thaliana (L.) Heynh. which lacks leaf starch was isolated by screening for plants which did not stain with iodine. The starchless phenotype, confirmed by quantitative enzymic analysis, is caused by a single recessive nuclear mutation which results in a deficiency of the

Hydrophilic interaction chromatography/electrospray mass spectrometry analysis of carbohydrate-related metabolites from Arabidopsis thaliana leaf tissue.

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This work describes the development and application of an on-line liquid chromatography/mass spectrometry (LC/MS) method using hydrophilic interaction chromatography (HILIC) coupled to negative ion mode electrospray ionisation ion trap mass spectrometry (ESI-MS) for the analysis of highly polar

Alteration of photosynthate partitioning by high-level expression of phosphoglucomutase in tobacco chloroplasts.

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Plastidial phosphoglucomutase (PGM) plays an important role in starch synthesis and degradation. Nonetheless, the impact of enhanced plastidial PGM activity on metabolism in photosynthetic tissue is yet to be elucidated. In this study, we generated transplastomic tobacco plants overproducing

Production and characterization of asymmetric somatic hybrids between Arabidopsis thaliana and Brassica napus.

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Cell suspension-derived protoplasts of a chlorsulfuron-resistant (GH50) strain of Arabidopsis thaliana cv Columbia were X-irradiated at 60 or 90 krad, to facilitate the elimination of GH50 donor chromosomes in fusion products. Irradiated GH50 protoplasts were fused, with polyethylene glycol, to

Starch-related cytosolic heteroglycans in roots from Arabidopsis thaliana.

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Both photoautotrophic and heterotrophic plant cells are capable of accumulating starch inside the plastid. However, depending on the metabolic state of the respective cell the starch-related carbon fluxes are different. The vast majority of the transitory starch biosynthesis relies on the hexose

Purification of a beta-Amylase that Accumulates in Arabidopsis thaliana Mutants Defective in Starch Metabolism.

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Amylase activity is elevated 5- to 10-fold in leaves of several different Arabidopsis thaliana mutants defective in starch metabolism when they are grown under a 12-hour photoperiod. Activity is also increased when plants are grown under higher light intensity. It was previously determined that the

Gravitropism in leaves of Arabidopsis thaliana (L.) Heynh.

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In higher plants, stems and roots show negative and positive gravitropism, respectively. However, current knowledge on the graviresponse of leaves is lacking. In this study, we analyzed the positioning and movement of rosette leaves of Arabidopsis thaliana under light and dark conditions. We found

Exaggerated root respiration accounts for growth retardation in a starchless mutant of Arabidopsis thaliana.

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The knock-out mutation of plastidial phosphoglucomutase (pgm) causes a starchless phenotype in Arabidopsis thaliana, and results in a severe growth reduction of plants cultivated under diurnal conditions. It has been speculated that high soluble sugar levels accumulating during the light phase in

A Quantification of the Significance of Assimilatory Starch for Growth of Arabidopsis thaliana L. Heynh.

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These studies use starch synthesis mutants to quantify the contribution of assimilatory starch to whole plant growth and form. Arabidopsis thaliana (L.) Heynh plants were used with null plastid phosphoglucomutase (T Caspar, SC Huber, CR Sommerville, [1986] Plant Physiol 79; 1-7) or 7% of wild-type

Quantification of sugars and sugar phosphates in Arabidopsis thaliana tissues using porous graphitic carbon liquid chromatography-electrospray ionization mass spectrometry.

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This work reports the development and optimisation of a negative ion mode on-line LC-ESI-MS/MS method for the sensitive targeted analysis of the key glycolytic intermediates, sugars and sugar phosphates from plants, using a porous graphitic carbon (PGC) stationary phase and an MS compatible mobile

Defects in leaf carbohydrate metabolism compromise acclimation to high light and lead to a high chlorophyll fluorescence phenotype in Arabidopsis thaliana.

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BACKGROUND We have studied the impact of carbohydrate-starvation on the acclimation response to high light using Arabidopsis thaliana double mutants strongly impaired in the day- and night path of photoassimilate export from the chloroplast. A complete knock-out mutant of the triose

Loss of cytosolic phosphoglucomutase compromises gametophyte development in Arabidopsis.

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Cytosolic phosphoglucomutase (cPGM) interconverts glucose-6-phosphate and glucose-1-phosphate and is a key enzyme of central metabolism. In this study, we show that Arabidopsis (Arabidopsis thaliana) has two cPGM genes (PGM2 and PGM3) encoding proteins with high sequence similarity and redundant

Expression of Arabidopsis plastidial phosphoglucomutase in tobacco stimulates photosynthetic carbon flow into starch synthesis.

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Phosphoglucomutase (PGM, EC 2.7.5.1) is one of the enzymes constituting the carbohydrate synthesis pathway in higher plants. It catalyzes the reversible conversion of glucose 6-phosphate (Glc6P) to glucose 1-phosphate (Glc1P). Previously, metabolic turnover analysis using (13)CO(2) in tobacco leaves

A defect in carbohydrate metabolism ameliorates symptom severity in virus-infected Arabidopsis thaliana.

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Altered starch accumulation is a characteristic biochemical symptom of virus infection in plants. To assess its biological importance, infection of Arabidopsis thaliana with Turnip vein-clearing virus, Cucumber mosaic virus or Cauliflower mosaic virus was investigated in plants grown under

Integration of metabolomic and proteomic phenotypes: analysis of data covariance dissects starch and RFO metabolism from low and high temperature compensation response in Arabidopsis thaliana.

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Statistical mining and integration of complex molecular data including metabolites, proteins, and transcripts is one of the critical goals of systems biology (Ideker, T., Galitski, T., and Hood, L. (2001) A new approach to decoding life: systems biology. Annu. Rev. Genomics Hum. Genet. 2, 343-372).

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