Effect of Propagation Method and Ploidy Level of Various Rootstocks on the Response of the Common Clementine ( Citrus clementina Hort. ex Tan) to a Mild Water Deficit

Julie Oustric, Radia Lourkisti, Stéphane Herbette, Raphaël Morillon, Gilles Paolacci, Noémie Gonzalez, Liliane Berti and Jérémie Santini
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Julie Oustric: Unité Mixte de Recherche (UMR) 6134 Sciences Pour l’Environnement (SPE), Centre National de la Recherche Scientifique (CNRS), Laboratoire Biochimie and Biologie Moléculaire du Végétal, Université de Corse, 20250 Corte, France
Radia Lourkisti: Unité Mixte de Recherche (UMR) 6134 Sciences Pour l’Environnement (SPE), Centre National de la Recherche Scientifique (CNRS), Laboratoire Biochimie and Biologie Moléculaire du Végétal, Université de Corse, 20250 Corte, France
Stéphane Herbette: Institut National de Recherche Pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Laboratoire de Physique et Physiologie Intégratives de l’Arbre Fruitier et Forestier (PIAF), Université Clermont Auvergne (UCA), 63000 Clermont-Ferrand, France
Raphaël Morillon: UMR-Amélioration Génétique et Adaptation des Plantes Méditerranéennes et Tropicales (AGAP), Centre de Coopération Internationale en Recherche Agronomique Pour le Développement (CIRAD), Equipe Structure Évolutive des Agrumes, Polyploïdie et Amélioration Génétique (SEAPAG), F-97170 Petit-Bourg, Guadeloupe, France
Gilles Paolacci: Association de Recherche et d’Expérimentation sur les Fruits et Légumes en Corse (AREFLEC), F-20230 San Giuliano, France
Noémie Gonzalez: Unité Mixte de Recherche (UMR) 6134 Sciences Pour l’Environnement (SPE), Centre National de la Recherche Scientifique (CNRS), Laboratoire Biochimie and Biologie Moléculaire du Végétal, Université de Corse, 20250 Corte, France
Liliane Berti: Unité Mixte de Recherche (UMR) 6134 Sciences Pour l’Environnement (SPE), Centre National de la Recherche Scientifique (CNRS), Laboratoire Biochimie and Biologie Moléculaire du Végétal, Université de Corse, 20250 Corte, France
Jérémie Santini: Unité Mixte de Recherche (UMR) 6134 Sciences Pour l’Environnement (SPE), Centre National de la Recherche Scientifique (CNRS), Laboratoire Biochimie and Biologie Moléculaire du Végétal, Université de Corse, 20250 Corte, France

Agriculture, 2020, vol. 10, issue 8, 1-21

Abstract: Current climatic upheavals reduce water availability which impacts the growth and fruit quality of plants. In citrus crops, scion/rootstock combinations are used to ensure high fruit production and quality and a stress tolerance/resistance. Our objective was to assess the effect on the clementine scion (C) under natural mild water deficit of (i) polyploid rootstocks by comparing the allotetraploid FlhorAG1 (C/4xFLs; trifoliate orange + Willowleaf mandarin) with its diploid parents, trifoliate orange (C/2xTOs), and Willowleaf mandarin (C/2xWLs), and with a diploid genotype used as reference (Carrizo citrange, C/2xCCs), (ii) rootstock propagation methods by comparing trifoliate orange seedling (C/2xTOs) with cutting (C/2xTOc). A mild water deficit observed under orchard conditions during the summer period (July–August) induced a significant change in yield (except in C/2xTOs), fruit size, and quality. C/2xCCs, C/2xTOs, and C/2xWLs appeared less affected by water deficit as indicated by their lower reduction of predawn leaf water potential (Ψ pd ), relative water content (RWC), transpiration (E), and photosynthetic parameters ( P net and g s ). Their greater redox balance was probably due to their better antioxidant efficiency. Seedling rootstocks lead to a better adaptation of clementine scions to water deficit than cutting or allotetraploid rootstock. Improving the tolerance to water deficit requires taking into consideration the rootstock genotype, propagation method, and ploidy level.

Keywords: antioxidant; Citrus; fruit parameters; oxidative stress; photosynthetic capacity; water deficit (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
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