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    From fruit growth to ripening in plantain: a careful balance between carbohydrate synthesis and breakdown

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    Journal Article (1.074Mb)
    Date
    2022-08-11
    Author
    Campos, N.A.
    Colombie, S.
    Moing, A.
    Cassan, C.
    Amah, D.
    Swennen, R.
    Gibon, Y.
    Carpentier, S.C.
    Type
    Journal Article
    Review Status
    Peer Review
    Target Audience
    Scientists
    Metadata
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    Abstract/Description
    In this study, we aimed to investigate for the first time different fruit development stages in plantain banana in order gain insights into the order of appearance and dominance of specific enzymes and fluxes. We examined fruit development in two plantain banana cultivars during the period between 2–12 weeks after bunch emergence using high-throughput proteomics, quantification of major metabolites, and analyses of metabolic fluxes. Starch synthesis and breakdown are processes that take place simultaneously. During the first 10 weeks fruits accumulated up to 48% of their dry weight as starch, and glucose 6-phosphate and fructose were important precursors. We found a unique amyloplast transporter and hypothesize that it facilitates the import of fructose. We identified an invertase originating from the Musa balbisiana genome that would enable carbon flow back to growth and starch synthesis and maintain a high starch content even during ripening. Enzymes associated with the initiation of ripening were involved in ethylene and auxin metabolism, starch breakdown, pulp softening, and ascorbate biosynthesis. The initiation of ripening was cultivar specific, with faster initiation being particularly linked to the 1-aminocyclopropane-1-carboxylate oxidase and 4-alpha glucanotransferase disproportionating enzymes. Information of this kind is fundamental to determining the optimal time for picking the fruit in order to reduce post-harvest losses, and has potential applications for breeding to improve fruit quality.
    Acknowledgements
    The authors would like to thank Kusay Arat for the technical support at SYBIOMA, KU Leuven, Belgium.
    https://dx.doi.org/10.1093/jxb/erac187
    Multi standard citation
    Permanent link to this item
    https://hdl.handle.net/20.500.12478/7715
    IITA Authors ORCID
    Delphine Amahhttps://orcid.org/0000-0002-5706-8773
    Rony Swennenhttps://orcid.org/0000-0002-5258-9043
    Digital Object Identifier (DOI)
    https://dx.doi.org/10.1093/jxb/erac187
    Research Themes
    Biotech and Plant Breeding
    IITA Subjects
    Agronomy; Banana; Food Security; Plant Breeding; Plant Production; Plantain
    Agrovoc Terms
    Bananas; Ripening; Musa; Species; Proteomics; Starch
    Regions
    Africa; West Africa
    Countries
    Nigeria
    Hubs
    Eastern Africa Hub; Headquarters and Western Africa Hub
    Journals
    Journal of Experimental Botany
    Collections
    • Journal and Journal Articles4835
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