Proline metabolism as regulatory hub.

María E Alvarez, Arnould Savouré, László Szabados

Journal: Trends in plant science 2022;27(1):39-55

PMID: 34366236

Full Text on Elsevier Science View on PubMed

Abstract

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.

Address: CIQUIBIC, CONICET, Departamento de Química Biológica Ranwel Caputto, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Córdoba X5000HUA, Argentina. Electronic address: [email protected].; Sorbonne Université, UPEC, CNRS, IRD, INRAE, Institute of Ecology and Environmental Sciences of Paris (iEES), Paris, France.; Institute of Plant Biology, Biological Research Centre, 6726-Szeged, Hungary. Electronic address: [email protected].

DOI: 10.1016/j.tplants.2021.07.009

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MeSH Terms: Osmotic Pressure, Photosynthesis, Plant Development, Plants, Proline