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Front Plant Sci


Title:Triploid Citrus Genotypes Have a Better Tolerance to Natural Chilling Conditions of Photosynthetic Capacities and Specific Leaf Volatile Organic Compounds
Author(s):Lourkisti R; Froelicher Y; Herbette S; Morillon R; Tomi F; Gibernau M; Giannettini J; Berti L; Santini J;
Address:"CNRS, Equipe de Biochimie et Biologie Moleculaire du Vegetal, UMR 6134 SPE, Universite de Corse, Corsica, France. CIRAD UMR AGAP, Station INRA, Corsica, France. UCA, INRA, PIAF, Clermont-Ferrand, France. Equipe 'Amelioration des Plantes a Multiplication Vegetative', UMR AGAP, Departement BIOS, CIRAD, Petit-Bourg, Guadeloupe. CNRS, Equipe Chimie et Biomasse, UMR 6134 SPE, Universite de Corse, Corsica, France"
Journal Title:Front Plant Sci
Year:2020
Volume:20200421
Issue:
Page Number:330 -
DOI: 10.3389/fpls.2020.00330
ISSN/ISBN:1664-462X (Print) 1664-462X (Electronic) 1664-462X (Linking)
Abstract:"Low temperatures during winter are one of the main constraints for citrus crop. Polyploid rootstocks can be used for improving tolerance to abiotic stresses, such as cold stress. Because the produced fruit are seedless, using triploid scions is one of the most promising approaches to satisfy consumer expectations. In this study, we evaluated how the triploidy of new citrus varieties influences their sensitivity to natural chilling temperatures. We compared their behavior to that of diploid citrus, their parents (Fortune mandarin and Ellendale tangor), and one diploid clementine tree, as reference, focusing on photosynthesis parameters, oxidative metabolism, and volatile organic compounds (VOC) in leaves. Triploid varieties appeared to be more tolerant than diploid ones to natural low temperatures, as evidenced by better photosynthetic properties (P(net), g(s), F(v)/F(m) , ETR/P (net) ratio), without relying on a better antioxidant system. The VOC levels were not influenced by chilling temperatures; however, they were affected by the ploidy level and atypical chemotypes were found in triploid varieties, with the highest proportions of E-beta-ocimene and linalool. Such compounds may contribute to better stress adaptation"
Keywords:chlorophyll fluorescence cold stress oxidative metabolism photosynthesis polyploidy volatile organic compounds;
Notes:"PubMed-not-MEDLINELourkisti, Radia Froelicher, Yann Herbette, Stephane Morillon, Raphael Tomi, Felix Gibernau, Marc Giannettini, Jean Berti, Liliane Santini, Jeremie eng Switzerland 2020/05/12 Front Plant Sci. 2020 Apr 21; 11:330. doi: 10.3389/fpls.2020.00330. eCollection 2020"

 
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