Search results for "Poliamines"

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Polyamine Oxidase 5 loss-of-function mutations in Arabidopsis thaliana trigger metabolic and transcriptional reprogramming and promote salt stress to…

2017

The family of polyamine oxidases (PAO) in Arabidopsis (AtPAO1-5) mediates polyamine (PA) back-conversion, which reverses the PA biosynthetic pathway from spermine, and its structural isomer thermospermine (tSpm), into spermidine and then putrescine. Here, we have studied the involvement of PA back-conversion in Arabidopsis salinity tolerance. AtPAO5 is the Arabidopsis PAO gene member most transcriptionally induced by salt stress. Two independent loss-of-function mutants (atpao5-2 and atpao5-3) were found to exhibit constitutively higher tSpm levels, with associated increased salt tolerance. Using global transcriptional and metabolomic analyses, the underlying mechanisms were studied. Stimul…

0106 biological sciences0301 basic medicineTranscription GeneticArabidopsis thalianaPhysiologyArabidopsisSperminePlant ScienceSodium Chloride01 natural scienceschemistry.chemical_compoundGene Expression Regulation PlantLoss of Function MutationArabidopsisPolyaminesMetabolitesArabidopsis thalianaPoliaminesAbscisic acidPrincipal Component AnalysisbiologyAgricultural SciencesSalt ToleranceMetabòlitsmetabolomicsPhenotypeBiochemistryMultigene FamilyMetabolomeCitric Acid CycleSalsCyclopentanes03 medical and health sciencesStress PhysiologicalOxylipinsRNA MessengerIonssalt toleranceArabidopsis ProteinsGene Expression ProfilingSodiumHydrogen PeroxideAgriculture Forestry and Fisheriesbiology.organism_classificationSpermidineGene Ontology030104 developmental biologychemistrythermosperminePutrescineSpermineSaltsOxidoreductases Acting on CH-NH2 Group DonorsTranscriptomejasmonatesPolyaminePolyamine oxidaseAbscisic Acid010606 plant biology & botany
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