Signaling in the Tomato Immunity against Fusarium oxysporum

• Published in: Molecules (Basel, Switzerland) Switzerland), 2021-03, Vol.26 (7), p.1818
• Main Authors: Hernández-Aparicio, Francisco, Lisón, Purificación, Rodrigo, Ismael, Bellés, José María, López-Gresa, M Pilar
• Format: Article
• Language: English
• Subjects: Abscisic acid; Allelochemicals; Benzenoids; Biosynthesis; biotic interaction; Chemical composition; Chemical control; Fungal infections; Fusarium; Fusarium - immunology; Fusarium - metabolism; Fusarium oxysporum; Gene expression; Genes; Immunity; Jasmonic acid; Metabolites; Metabolomics; natural products; NMR; Nuclear magnetic resonance; Pathogens; Plant Diseases - immunology; Plant Diseases - microbiology; Plant Immunity; Plant protection; Plant Proteins - immunology; Plant Proteins - metabolism; Salicylic acid; Signal Transduction - immunology; Solanum lycopersicum - immunology; Solanum lycopersicum - metabolism; Solanum lycopersicum - microbiology; Sustainability; tomato; Tomatoes; Volatile compounds; Volatiles; Wilt
• ISSN: 1420-3049; 1420-3049
• DOI: 10.3390/molecules26071818

New strategies of control need to be developed with the aim of economic and environmental sustainability in plant and crop protection. Metabolomics is an excellent platform for both understanding the complex plant-pathogen interactions and unraveling new chemical control strategies. GC-MS-based metabolomics, along with a phytohormone analysis of a compatible and incompatible interaction between tomato plants and f. sp. revealed the specific volatile chemical composition and the plant signals associated with them. The susceptible tomato plants were characterized by the over-emission of methyl- and ethyl-salicylate as well as some fatty acid derivatives, along with an activation of salicylic acid and abscisic acid signaling. In contrast, terpenoids, benzenoids, and 2-ethylhexanoic acid were differentially emitted by plants undergoing an incompatible interaction, together with the activation of the jasmonic acid (JA) pathway. In accordance with this response, a higher expression of several genes participating in the biosynthesis of these volatiles, such as , and , as well as , a JA marker gene, was found to be induced by the fungus in these resistant plants. The characterized metabolome of the immune tomato plants could lead to the development of new resistance inducers against wilt treatment.