2. Academic Validation
  3. Seasonal Variation of Plant Defense Inductor Ellagitannins in Strawberry Leaves under Field Conditions for Phytosanitary Technological Applications

Seasonal Variation of Plant Defense Inductor Ellagitannins in Strawberry Leaves under Field Conditions for Phytosanitary Technological Applications

  • J Agric Food Chem. 2021 Oct 27;69(42):12424-12432. doi: 10.1021/acs.jafc.1c03810.
Carlos F Grellet-Bournonville 1,  Pía de Los Ángeles Di Peto 1,  Ana M Cerviño Dowling 1,  Atilio P Castagnaro 1,  Guillermo Schmeda-Hirschmann 2,  Juan C Díaz Ricci 3,  Alicia I Mamaní 4,  María P Filippone 1
Affiliations

Affiliations

  • 1 Instituto de Tecnología Agroindustrial del Noroeste Argentino (ITANOA), Estación Experimental Agroindustrial Obispo Colombres (EEAOC)-Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Las Talitas, Tucumán T4101, Argentina.
  • 2 Laboratorio de Química de Productos Naturales, Instituto de Química de Recursos Naturales, Universidad de Talca, Talca 3460000, Chile.
  • 3 Instituto Superior de Investigaciones Biológicas (INSIBIO, CONICET-UNT) and Instituto de Química Biológica "Dr. Bernabé Bloj", Facultad de Bioquímica, Química y Farmacia, UNT, San Miguel de Tucumán, Tucumán T4000, Argentina.
  • 4 Facultad de Agronomía y Zootecnia (FAZ), Universidad Nacional de Tucumán (UNT), San Miguel de Tucumán, Tucumán T4000, Argentina.
PMID: 34649430 DOI: 10.1021/acs.jafc.1c03810
Abstract

Many natural compounds can activate the plant immunity, and for this reason, they have attracted special interest in crop disease management. Previously, we isolated from strawberry leaves an ellagitannin (HeT), which elicits plant defense responses. In this research, we investigated bioactive compounds from field-collected strawberry leaves capable of inducing defense responses in Arabidopsis thaliana against a Bacterial pathogen. Methanolic extracts of strawberry leaves sampled at different months were obtained and compared. The highest content of total soluble phenolic compounds was found in the methanolic extracts of leaves sampled in December (DME). The defense response induced in A. thaliana by DME was attributed to two ellagitannins, the HeT and galloyl-HHDP-glucose. Both compounds exhibited phytoprotective effects against Pseudomonas viridiflava and induced the expression of PDF1.2 and PR1 genes. These results provide an economic value to strawberry leaves, normally discarded at the end of the harvest stage of the crop, as a raw material for plant health enhancer bioinputs.

Keywords

Fragaria x ananassa; crop wastes; elicitors; leaves; sustainability.

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