LOUPIT, Gregoire; VALLS FONAYET, Josep; LORENSEN, Marcus; FRANC, Céline; DE REVEL, Gilles; JANFELT, Christian; COOKSON, Sarah

doi:10.1111/pce.14693

Ecophysiologie et Génomique Fonctionnelle de la Vigne [UMR EGFV]

VALLS FONAYET, Josep

Unité de Recherche Œnologie [Villenave d'Ornon] [OENO]

LORENSEN, Marcus

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Article de revue

Ce document a été publié dans

Plant, Cell & Environment. 2023-08, vol. 46, p. 3871–3886

Résumé en anglais

Grafting is widely used in horticulture. Shortly after grafting, callus tissues appear at the graft interface and the vascular tissues of the scion and rootstock connect. The graft interface contains a complex mix of tissues, we hypothesised that each tissue has its own metabolic response to wounding/grafting and accumulates different metabolites at different rates. We made intact and wounded cuttings and grafts of grapevine, and then measured changes in bulk flavonoid, phenolic acid and stilbenoid concentration and used metabolite imaging to study tissue‐specific responses. We show that some metabolites rapidly accumulate in specific tissues after grafting, for example, stilbene monomers accumulate in necrotic tissues surrounding mature xylem vessels. Whereas other metabolites, such as complex stilbenes, accumulate in the same tissues at later stages. We also observe that other metabolites accumulate in the newly formed callus tissue and identify genotype‐specific responses. In addition, exogenous resveratrol application did not modify grafting success rate, potentially suggesting that the accumulation of resveratrol at the graft interface is not linked to graft union formation. The increasing concentration of complex stilbenes often occurs in response to plant stresses (via unknown mechanisms), and potentially increases antioxidant activity and antifungal capacities.< Réduire

Mots clés en anglais

MALDI‐MSI

perennial

rootstock

scion

Vitis spp

wounding

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https://oskar-bordeaux.fr/handle/20.500.12278/186232

DOI

http://dx.doi.org/10.1111/pce.14693

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Tissue-specific stilbene accumulation is an early response to wounding/grafting as revealed by using spatial and temporal metabolomics

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Tissue-specific stilbene accumulation is an early response to wounding/grafting as revealed by using spatial and temporal metabolomics

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Résumé en anglais

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