Multisite evaluation of phenotypic plasticity for specialized metabolites, some involved in carrot quality and disease resistance

Wilfried Chevalier, Sitti-Anlati Moussa, Miguel Medeiros Netto Ottoni, Cécile Dubois-Laurent, Sébastien Huet, Christophe Aubert, Elsa Desnoues, Brigitte Navez, Valentine Cottet, Guillaume Chalot, Michel Jost, Laure Barrot, Gerald Freymark, Maarten Uittenbogaard, François Chaniet, Anita Suel, Marie-Hélène Bouvier Merlet, Latifa Hamama, Valérie Le Clerc, Mathilde Briard, Didier Peltier and Emmanuel Geoffriau

PLOS ONE, 2021, vol. 16, issue 4, 1-22

Abstract: Renewed consumer demand motivates the nutritional and sensory quality improvement of fruits and vegetables. Specialized metabolites being largely involved in nutritional and sensory quality of carrot, a better knowledge of their phenotypic variability is required. A metabolomic approach was used to evaluate phenotypic plasticity level of carrot commercial varieties, over three years and a wide range of cropping environments spread over several geographical areas in France. Seven groups of metabolites have been quantified by HPLC or GC methods: sugars, carotenoids, terpenes, phenolic compounds, phenylpropanoids and polyacetylenes. A large variation in root metabolic profiles was observed, in relation with environment, variety and variety by environment interaction effects in decreasing order of importance. Our results show a clear diversity structuration based on metabolite content. Polyacetylenes, β-pinene and α-carotene were identified mostly as relatively stable varietal markers, exhibiting static stability. Nevertheless, environment effect was substantial for a large part of carrot metabolic profile and various levels of phenotypic plasticity were observed depending on metabolites and varieties. A strong difference of environmental sensitivity between varieties was observed for several compounds, particularly myristicin, 6MM and D-germacrene, known to be involved in responses to biotic and abiotic stress. This work provides useful information about plasticity in the perspective of carrot breeding and production. A balance between constitutive content and environmental sensitivity for key metabolites should be reached for quality improvement in carrot and other vegetables.

Date: 2021
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Persistent link: https://EconPapers.repec.org/RePEc:plo:pone00:0249613

DOI: 10.1371/journal.pone.0249613

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