Multiscale localization of procyanidins in ripe and overripe perry pears by light and transmission electron microscopy - INRAE - Institut national de recherche pour l’agriculture, l’alimentation et l’environnement
Article Dans Une Revue Journal of Agricultural and Food Chemistry Année : 2020

Multiscale localization of procyanidins in ripe and overripe perry pears by light and transmission electron microscopy

Résumé

Histochemical staining with 4-dimethylaminocinnamaldehyde (DMACA), light microscopy, and transmission electron microscopy (TEM) were applied to characterize procyanidin localization at ripe and overripe stages in perry pear flesh (cv. ‘De Cloche’). Pear flesh contained stone cell clusters surrounded by very large parenchyma cells. DMACA staining showed procyanidins mainly located in parenchyma cells from the fruit mesocarp. Under light microscopy and TEM, procyanidins appeared in the vacuole of parenchyma cells as uniformly stained granules, probably tannosomes. They were differently dispersed in ripe and overripe perry pears, as the granules remained free inside the vacuole in ripe pears and mostly attached to the tonoplast in overripe pears.
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hal-02940257 , version 1 (07-03-2022)

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Marwa Brahem, Isabelle Bornard, Catherine M.G.C. Renard, Carine Le Bourvellec. Multiscale localization of procyanidins in ripe and overripe perry pears by light and transmission electron microscopy. Journal of Agricultural and Food Chemistry, 2020, 68 (33), pp.8900-8906. ⟨10.1021/acs.jafc.0c02036⟩. ⟨hal-02940257⟩
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