From fruit growth to ripening in plantain: a careful balance between carbohydrate synthesis and breakdown
SWENNEN, R.
Catholic University of Leuven = Katholieke Universiteit Leuven [KU Leuven]
International Institute of Tropical Agriculture [IITA-Tanzania]
Catholic University of Leuven = Katholieke Universiteit Leuven [KU Leuven]
International Institute of Tropical Agriculture [IITA-Tanzania]
CARPENTIER, S.C.
Catholic University of Leuven = Katholieke Universiteit Leuven [KU Leuven]
Bioversity International [Belgique]
< Leer menos
Catholic University of Leuven = Katholieke Universiteit Leuven [KU Leuven]
Bioversity International [Belgique]
Idioma
en
Document de travail - Pré-publication
Este ítem está publicado en
2021-12-06
Resumen en inglés
We investigated the fruit development in two plantain banana cultivars from two weeks after bunch emergence till twelve weeks through high-throughput proteomics, major metabolite quantification and metabolic flux analyses. ...Leer más >
We investigated the fruit development in two plantain banana cultivars from two weeks after bunch emergence till twelve weeks through high-throughput proteomics, major metabolite quantification and metabolic flux analyses. We give for the first time an insight at early stages of starch synthesis and breakdown. Starch and sugar synthesis and breakdown are processes that take place simultaneously. During the first eight to ten weeks the balance between synthesis and breakdown is clearly in favour of sugar breakdown and a net starch synthesis occurs. During this period, plantain fruit accumulates up to 48% of starch. The initiation of the ripening process is accompanied with a shift in balance towards net starch breakdown. The key enzymes related to this are phosphoglucan water dikinase (PWD), phosphoglucan phosphatase, α-1,6-glucosidase starch debranching enzyme (DBE), alpha glucan phosphorylase (PHS) and 4-alpha glucanotransferase disproportioning enzyme (DPE). The highest correlations with sucrose have been observed for PHS and DPE. There is also a significant correlation between the enzymes involved in ethylene biosynthesis, starch breakdown, pulp softening and ascorbate biosynthesis. The faster ending of maturation and starting of ripening in the Agbagba cultivar are linked to the key enzymes 1-aminocyclopropane-1-carboxylate oxidase and DPE. This knowledge of the mechanisms that regulate starch and sugar metabolisms during maturation and ripening is fundamental to determine the harvest moment, reduce postharvest losses and improve final product quality of breeding programs.< Leer menos
Palabras clave
plante fruitière
Fruit
Développement du fruit
Maturation
Métabolisme
flux métaboliques
métabolite
sucres
amidon
Proyecto ANR
Centre français de phénomique végétale - ANR-11-INBS-0012
Orígen
Importado de HalCentros de investigación