4.7 Review

The intimate talk between plants and microorganisms at the leaf surface

Journal

JOURNAL OF EXPERIMENTAL BOTANY
Volume 68, Issue 19, Pages 5339-5350

Publisher

OXFORD UNIV PRESS
DOI: 10.1093/jxb/erx327

Keywords

Bacteria; cutin monomers; epicuticular waxes; fungi; innate immunity; microorganism; plant cuticle; phyllosphere

Categories

Funding

  1. Consejo Nacional de Ciencia y Tecnologia (CONACYT), Mexico [240087]
  2. Direccion General de Asuntos del Personal Academico-UNAM PAPIIT [RA200316]

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The plant epidermis or cuticle is constantly exposed to external and internal environmental factors, including an enriched and diverse community of bacteria, yeast, fungi, viruses, and mites. It is not only where the plant has its first physical barrier, but also where organisms can be recognized and potentially where the plant defense responses can be triggered. The plant cuticle is a polymeric composite formed by an array of structurally and chemically heterogeneous compounds, including cutin and wax. A few studies have shown that cuticular components are essential and important drivers of the structure and size of the bacterial community. On the other hand, cuticular components are also important for both pathogens and plants, to initiate the pre-invasion and infection process and to activate the innate immune response, respectively. In this review, we explore current knowledge on the role of the cuticle during the intimate interactions between plants and microorganisms, in particular pathogenic and non-pathogenic bacteria and fungi. Finally, we propose new perspectives on the potential use of this information for agriculture.

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