Pedicel anatomy and histology in tomato vary according to genotype and water-deficit environment, affecting fruit mass

Simon Jeanna, Baptiste Christelle, Lartaud Marc, Verdeil Jean-Luc, Brunel Béatrice, Vercambre Gilles, Génard Michel, Cardoso Maida, Alibert Eric, Goze-Bac Christophe, Bertin Nadia. 2022. Pedicel anatomy and histology in tomato vary according to genotype and water-deficit environment, affecting fruit mass. Plant Science, 321:111313, 10 p.

https://doi.org/10.1016/j.plantsci.2022.111313

Article de revue ; Article de recherche ; Article de revue à facteur d'impact

Version publiée - Anglais
Accès réservé aux personnels Cirad
Utilisation soumise à autorisation de l'auteur ou du Cirad.
603995.pdf
Télécharger (5MB) | Demander une copie

Résumé : The growth and composition of fleshy fruits depend on resource acquisition and distribution in the plant. In tomato, the pedicel serves as the final connection between plant and fruit. However, very few quantitative data are available for the conducting tissues of the pedicel, nor is their genetic variability known. In the present study, a histological approach was combined with process-based modeling to evaluate the potential contribution made by the anatomy and histology of the pedicel to variations in fruit mass. Eleven genotypes were characterized and the impact of water deficit was studied for a single genotype using stress intensity and stage of application as variables. The results highlighted extensive variations in the relative proportions of the different pedicel tissues and in the absolute areas of xylem and phloem between genotypes. The model suggests that the variations in the area of the pedicel's vascular tissues induced by differences in genotype and water-deficit environments partly contributed to fruit mass variability. They therefore warrant phenotyping for use in the development of plant strains adapted to future environmental constraints. The results also demonstrated the need to develop non-invasive in vivo measurement methods to establish the number and size of active vessels and the flow rates in these vessels to improve prediction of water fluxes in plant architecture.

Mots-clés Agrovoc : Solanum lycopersicum, génotype, anatomie végétale, phloème, xylème, croissance, variation génétique, pédicelle

Mots-clés géographiques Agrovoc : France

Mots-clés libres : Solanum lycopersicum, Pedicel histology, Water deficit, Genotypic variability, Virtual fruit model, Xylem conductivity

Champ stratégique Cirad : CTS 2 (2019-) - Transitions agroécologiques

Agences de financement hors UE : Agence Nationale de la Recherche

Projets sur financement : (FRA) Agricultural Sciences for sustainable Development, (FRA) MUSE

Auteurs et affiliations