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Regulation of Proline Accumulation and Its Molecular and Physiological Functions in Stress Defence

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Osmoprotectant-Mediated Abiotic Stress Tolerance in Plants

Abstract

The accumulation of proline is a conserved response of plants to abiotic stress conditions. Moreover, the activation of proline metabolism takes place during the plant response to some pathogens. Although these responses are well documented, the molecular and physiological functions of proline accumulation under stress are still a matter of debate. The biochemical pathways that lead to proline accumulation and its functions in regulating development are described in the cognate chapter “Proline Metabolism and Its Functions in Development and Tolerance to Stress”. In this chapter, we will describe the potential roles assigned to proline accumulation, dissecting the data coming from in vitro/in silico and in vivo approaches and those coming from bacterial or unicellular eukaryotes and plants. With this, we aim to present a clear view of the evidence related to the molecular and physiological functions of proline accumulation under stress conditions in plants. In recent years, the understanding of the regulation of proline accumulation at transcriptional level under stress conditions in plants has been increased considerably, yet little is known about the possible occurrence of post-translational regulatory mechanisms. We will integrate this knowledge with the potential roles of proline accumulation to see whether it contributes to comprehending which roles might be physiologically more relevant.

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Author information

Authors and Affiliations

  1. Department of Life Science and Biotechnology, University of Ferrara, Ferrara, Italy

    Giuseppe Forlani

  2. Department of Biology and Biotechnology, Sapienza University of Rome, Rome, Italy

    Maurizio Trovato

  3. Department of Biology, Division of Plant Physiology and Biochemistry, University of Konstanz, Konstanz, Germany

    Dietmar Funck

  4. Department of Plant Biology, Universidad de la República, Montevideo, Uruguay

    Santiago Signorelli

Authors
  1. Giuseppe Forlani
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  2. Maurizio Trovato
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  3. Dietmar Funck
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  4. Santiago Signorelli
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Corresponding authors

Correspondence to Giuseppe Forlani or Santiago Signorelli .

Editor information

Editors and Affiliations

  1. Department of Genetics and Plant Breeding, Bangladesh Agricultural University, Mymensingh, Bangladesh

    Mohammad Anwar Hossain

  2. Department of Biotechnology, Modern College, Pune, Maharashtra, India

    Vinay Kumar

  3. Department of Botany, University of Otago, Dunedin, Otago, New Zealand

    David J. Burritt

  4. Laboratory of Plant Stress Responses, Kagawa University, Kagawa, Kagawa, Japan

    Masayuki Fujita

  5. Department of Agricultural Sciences, University of Helsinki, Helsinki, Finland

    Pirjo S. A. Mäkelä

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Forlani, G., Trovato, M., Funck, D., Signorelli, S. (2019). Regulation of Proline Accumulation and Its Molecular and Physiological Functions in Stress Defence. In: Hossain, M., Kumar, V., Burritt, D., Fujita, M., Mäkelä, P. (eds) Osmoprotectant-Mediated Abiotic Stress Tolerance in Plants. Springer, Cham. https://doi.org/10.1007/978-3-030-27423-8_3

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