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polyamine/arabidopsis thaliana
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Phenylpropanoid polyamine conjugate biosynthesis in Arabidopsis thaliana flower buds.
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Phenylpropanoid polyamine conjugates have been identified in flowers of many plant species. Their presence in Arabidopsis thaliana has only been recently established in flower buds and pollen grains. Annotation and location of a cation-dependent O-methyltransferase AtTSM1 specifically to the tapetum
Characterization of five polyamine oxidase isoforms in Arabidopsis thaliana.
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The genome of Arabidopsis thaliana contains five genes (AtPAO1 to AtPAO5) encoding polyamine oxidase (PAO) which is an enzyme responsible for polyamine catabolism. To understand the individual roles of the five AtPAOs, here we characterized their tissue-specific and space-temporal expression. AtPAO1
Polyamines and salt stress response and tolerance in Arabidopsis thaliana flowers.
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In the present study we analysed polyamine metabolism in Arabidopsis thaliana (ecotype Columbia) flowers and stalks collected from plants germinated and grown under increasing salt-stress conditions (0-75 mM NaCl). The expression level of the different isoforms of polyamine biosynthetic enzymes was
Evidence for polyamine channels in protoplasts and vacuoles of Arabidopsis thaliana cells.
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The presence of ion channels permeable to polyamines in the plasma membrane and tonoplast of Arabidopsis thaliana cultured cells was investigated by means of the patch-clamp technique in the whole-cell configuration. Evidence is shown for channels, activated by depolarizations in protoplasts and by
Generation of EMS-Mutagenized Populations of Arabidopsis thaliana for Polyamine Genetics.
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In the recent years, genetic engineering of polyamine biosynthetic genes has provided evidence for their involvement in plant stress responses and different aspects of plant development. Such approaches are being complemented with the use of reverse genetics, in which mutants affected on a
Polyamine Homeostasis in Wild Type and Phenolamide Deficient Arabidopsis thaliana Stamens.
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Polyamines (PAs) like putrescine, spermidine, and spermine are ubiquitous polycationic molecules that occur in all living cells and have a role in a wide variety of biological processes. High amounts of spermidine conjugated to hydroxycinnamic acids are detected in the tryphine of Arabidopsis
Polyamine metabolism and biosynthetic gene expression in Arabidopsis thaliana under salt stress.
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In the present study we analysed polyamine metabolism in Arabidopsis thaliana (ecotype Columbia) rosette leaves collected at vegetative and reproductive stages from plants germinated and grown under increasing salt stress (0-75 mM NaCl) conditions. The expression level of the different isoforms of
Polyamine oxidase 2 is involved in regulating excess spermidine contents during seed germination and early seedling development in Arabidopsis thaliana.
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To understand the physiological functions of polyamine oxidases (PAOs) in plants, we analyzed the effects of exogenous polyamines during seed germination and early seedling development, using Arabidopsis thaliana lines independently harboring T-DNA insertions in each PAO gene. Spermine caused
Involvement of polyamines in sucrose-induced tolerance to atrazine-mediated chemical stress in Arabidopsis thaliana.
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Treatment of Arabidopsis thaliana seedlings with the PSII-inhibiting herbicide atrazine results in xenobiotic and oxidative stress, developmental arrest, induction of senescence and cell death processes. In contrast, exogenous sucrose supply confers a high level of atrazine stress tolerance, in
Polyamine-responsive ribosomal arrest at the stop codon of an upstream open reading frame of the AdoMetDC1 gene triggers nonsense-mediated mRNA decay in Arabidopsis thaliana.
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During mRNA translation, nascent peptides with certain specific sequences cause arrest of ribosomes that have synthesized themselves. In some cases, such ribosomal arrest is coupled with mRNA decay. In yeast, mRNA quality control systems have been shown to be involved in mRNA decay associated with
Genome Wide Association Mapping for the Tolerance to the Polyamine Oxidase Inhibitor Guazatine in Arabidopsis thaliana.
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Guazatine is a potent inhibitor of polyamine oxidase (PAO) activity. In agriculture, guazatine is used as non-systemic contact fungicide efficient in the protection of cereals and citrus fruits against disease. The composition of guazatine is complex, mainly constituted by a mixture of synthetic
Modulation of polyamine biosynthesis in Arabidopsis thaliana by a drought mitigating Pseudomonas putida strain.
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Plant growth promoting rhizobacteria (PGPR) are a diverse group of beneficial soil bacteria that help plants in myriad ways. They are implicated in the processes of general growth and development, as well as stress mitigation. Although the physiology of plant-PGPR interaction for abiotic stress
Effect of reduced arginine decarboxylase activity on salt tolerance and on polyamine formation during salt stress in Arabidopsis thaliana.
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Polyamines have been suggested to play an important role in stress protection. However, attempts to determine the function of polyamines have been complicated by the fact that, dependent on the conditions, polyamine contents increase or decrease during stress. To determine the importance of
Polyamines induce rapid biosynthesis of nitric oxide (NO) in Arabidopsis thaliana seedlings.
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In this study, we examined the regulation by putrescine, spermidine and spermine of nitric oxide (NO) biosynthesis in Arabidopsis thaliana seedlings. Using a fluorimetric method employing the cell-impermeable NO-binding dye diaminorhodamine-4M (DAR-4M), we observed that the polyamines (PAs)
Copper-containing amine oxidases contribute to terminal polyamine oxidation in peroxisomes and apoplast of Arabidopsis thaliana.
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BACKGROUND
Polyamines (PAs) are oxidatively deaminated at their primary or secondary amino-groups by copper-containing amine oxidases (CuAOs) or FAD-dependent amine oxidases (PAOs), respectively. Both enzymes have long been considered to be apoplastic proteins. However, three out of five PAO
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