Molecular reprogramming in grapevine woody tissues at bud burst - INRAE - Institut national de recherche pour l’agriculture, l’alimentation et l’environnement Access content directly
Journal Articles Plant Science Year : 2021

Molecular reprogramming in grapevine woody tissues at bud burst


Perennial woody plants undergo a period of dormancy from the beginning of autumn until the end of spring. Whereas the molecular and physiological events that characterize dormancy release of buds have been described in detail, those occurring in woody tissues underneath the buds are mostly unknown. To bridge this gap, the mRNA populations of cane segments located underneath the bud were analyzed at bud dormancy (E-L 1) and at bud burst (E-L 4). They revealed an important reprogramming of gene expression suggesting that cell division, cell wall metabolism and the mobilization of sugars are the main metabolic and cellular events occurring in cane woody tissues at bud burst. Also, the upregulation of several genes of sugar metabolism, encoding starch- and sucrose-degrading enzymes and sugar transporters, correlates with the decrease in starch and soluble sugars in woody tissues concomitant with increased sucrose synthase and alpha-amylolytic biochemical activities. The latter is likely due to the VviAMY2 gene that encodes a functional alpha-amylase as observed after its heterologous expression in yeast. Taken together, these results are consistent with starch and sugar mobilization in canes being primarily involved in grapevine secondary growth initiation and supporting the growth of the emerging bud.
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Dates and versions

hal-03347178 , version 1 (22-08-2023)


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Henrique Noronha, Virginie Garcia, Angélica Silva, Serge Delrot, Philippe Gallusci, et al.. Molecular reprogramming in grapevine woody tissues at bud burst. Plant Science, 2021, 311, ⟨10.1016/j.plantsci.2021.110984⟩. ⟨hal-03347178⟩


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