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Proline metabolism as regulatory hub

Alvarez, María E. ; Savouré, Arnould ; Szabados, László

Trends in plant science, 2022-01, Vol.27 (1), p.39-55 [Periódico revisado por pares]

England: Elsevier Ltd

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  • Título:
    Proline metabolism as regulatory hub
  • Autor: Alvarez, María E. ; Savouré, Arnould ; Szabados, László
  • Assuntos: Acclimation ; Acclimatization ; Amino acids ; Biosynthesis ; Catabolism ; Energy balance ; environmental stress ; Gene expression ; Homeostasis ; light ; Metabolism ; Mitochondria ; Nutrient availability ; Nutrient balance ; Nutrient status ; Osmosis ; Osmotic Pressure ; pathogen defenses ; Photosynthesis ; Plant Development ; Plants - metabolism ; Proline ; Proline - metabolism ; Signal processing ; SnRK1 kinase ; TOR kinase
  • É parte de: Trends in plant science, 2022-01, Vol.27 (1), p.39-55
  • Notas: ObjectType-Article-2
    SourceType-Scholarly Journals-1
    ObjectType-Feature-3
    content type line 23
    ObjectType-Review-1
  • Descrição: Proline is a multifunctional amino acid that is accumulated in high concentrations in plants under various stress conditions. Proline accumulation is intimately connected to many cellular processes, such as osmotic pressure, energy status, nutrient availability, changes in redox balance, and defenses against pathogens. Proline biosynthesis and catabolism is linked to photosynthesis and mitochondrial respiration, respectively. Proline can function as a signal, modulating gene expression and certain metabolic processes. We review important findings on proline metabolism and function of the last decade, giving a more informative picture about the function of this unusual amino acid in maintaining cellular homeostasis, modulating plant development, and promoting stress acclimation. Several transcription and signaling factors that regulate proline metabolism have recently been identified.Proline metabolism is coordinated with various metabolic pathways in different cellular compartments and integrates redox and energy balance, growth, and defense regulation. Energy status of the cell regulates proline biosynthesis and catabolism via TOR- and SnRK1-dependent signaling. Infection with pathogens induces both proline biosynthesis and catabolism with spatial and temporal differences. Understanding the role of the SnRK1-TOR signaling pathways in the regulation of pathogen-triggered proline catabolism is a new challenge.Recent studies highlighted the role of proline recycling through the P5C-proline cycle, which can also contribute to plant stress tolerance.
  • Editor: England: Elsevier Ltd
  • Idioma: Inglês
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