Histological, histochemical and phytochemical characterization of Coffea spp. resistance to the root-knot nematode Mmeloidogyne paranaensis

Villain Luc, Martinez Dominique, Mondolot Cosson Laurence, La Fisca P., Nicole Michel, Campa Claudine. 2015. Histological, histochemical and phytochemical characterization of Coffea spp. resistance to the root-knot nematode Mmeloidogyne paranaensis. In : Proceedings of the 25th International Conference on Coffee Science. ASIC. Paris : ASIC, 42-46. ISBN 978-2-900212-24-0 International Conference on Coffee Science. 25, Armenia, Colombie, 8 Septembre 2014/13 Septembre 2014.

Résumé : Meloidogyne paranaensis is a root-knot nematode (RKN) affecting coffee production in Latin America. Simultaneous histological and histochemical studies were carried out on Coffea arabica cv Caturra (susceptible), a wild Ethiopian accession of Coffea arabica (resistant ) and a rootstock Coffea canephora cv Nemaya (resistant) after inoculation with this RKN in order to characterize compounds accumulating after infection in resistant cultivars. No hypersensitive-like reaction was induced neither in C. arabica, nor in C. canephora resistant genotypes. Instead, these two resistant coffee genotypes develop the same original resistance mechanisms against M. paranaensis i.e. flavonoids accumulation into giant cells of the feeding sites induced by the RKN. Chlorogenic acids accumulating around infestation sites could act as flavonoid precursors.

Classification Agris : F60 - Physiologie et biochimie végétale
F30 - Génétique et amélioration des plantes
H10 - Ravageurs des plantes

Auteurs et affiliations

• Villain Luc, CIRAD-BIOS-UMR RPB (MEX)
• Martinez Dominique, CIRAD-DGDRD-DRAG (GLP)
• Mondolot Cosson Laurence, UM1 (FRA)
• La Fisca P., UM1 (FRA)
• Nicole Michel, IRD (FRA)
• Campa Claudine, IRD (FRA)

Source : Cirad-Agritrop (https://agritrop.cirad.fr/579988/)

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