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Radiationless mechanism of UV deactivation by cuticle phenolics in plants

Author

Listed:
  • Ana González Moreno

    (Universidad de Málaga)

  • Abel Cózar

    (Universidad del País Vasco / Euskal Herriko Unibertsitatea (UPV/EHU) and Donostia International Physics Center (DIPC), P. K
    Ikerbasque, Basque Foundation for Science)

  • Pilar Prieto

    (Universidad de Castilla-La Mancha)

  • Eva Domínguez

    (Departamento de Mejora Genética y Biotecnología, Estación Experimental La Mayora, Algarrobo-Costa)

  • Antonio Heredia

    (Universidad de Málaga)

Abstract

Hydroxycinnamic acids present in plant cuticles, the interphase and the main protective barrier between the plant and the environment, exhibit singular photochemical properties that could allow them to act as a UV shield. Here, we employ transient absorption spectroscopy on isolated cuticles and leaf epidermises to study in situ the photodynamics of these molecules in the excited state. Based on quantum chemical calculations on p-coumaric acid, the main phenolic acid present in the cuticle, we propose a model in which cuticle phenolics display a photoprotective mechanism based in an ultrafast and non-radiative excited state deactivation combined with fluorescence emission. As such, the cuticle can be regarded as the first and foremost protective barrier against UV radiation. This photostable and photodynamic mechanism seems to be universal in land plants giving a special role and function to the presence of different aromatic domains in plant cuticles and epidermises.

Suggested Citation

  • Ana González Moreno & Abel Cózar & Pilar Prieto & Eva Domínguez & Antonio Heredia, 2022. "Radiationless mechanism of UV deactivation by cuticle phenolics in plants," Nature Communications, Nature, vol. 13(1), pages 1-11, December.
    • Handle: RePEc:nat:natcom:v:13:y:2022:i:1:d:10.1038_s41467-022-29460-9
    DOI: 10.1038/s41467-022-29460-9
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    References listed on IDEAS

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    1. Hugues Renault & Annette Alber & Nelly A. Horst & Alexandra Basilio Lopes & Eric A. Fich & Lucie Kriegshauser & Gertrud Wiedemann & Pascaline Ullmann & Laurence Herrgott & Mathieu Erhardt & Emmanuelle, 2017. "A phenol-enriched cuticle is ancestral to lignin evolution in land plants," Nature Communications, Nature, vol. 8(1), pages 1-8, April.
    2. Snellenburg, Joris J. & Laptenok, Sergey & Seger, Ralf & Mullen, Katharine M. & van Stokkum, Ivo H. M., 2012. "Glotaran: A Java-Based Graphical User Interface for the R Package TIMP," Journal of Statistical Software, Foundation for Open Access Statistics, vol. 49(i03).
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