Pedicel anatomy and histology in tomato vary according to genotype and water-deficit environment, affecting fruit mass
Simon, Jeanne | Baptiste, Christelle | Lartaud, Marc | Verdeil, Jean‐luc | Brunel, Béatrice | Vercambre, G. | Génard, Michel | Cardoso, Maïda | Alibert, Éric | Goze-Bac, Christophe | Bertin, Nadia | Plantes et systèmes de culture horticoles (PSH) ; Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) | Laboratoire Charles Coulomb (L2C) ; Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM) | Amélioration génétique et adaptation des plantes méditerranéennes et tropicales (UMR AGAP) ; Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut Agro Montpellier ; Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Université de Montpellier (UM) | Département Systèmes Biologiques (Cirad-BIOS) ; Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad) | Université de Montpellier (UM) | ANR-10-LABX-0001,AGRO,Agricultural Sciences for sustainable Development(2010) | ANR-16-IDEX-0006,MUSE,MUSE(2016)
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Показать больше [+] Меньше [-]Английский. 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.
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