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    Set up from the beginning: the origin and early development of cassava storage roots

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    Journal Article (1.644Mb)
    Date
    2022
    Author
    Carluccio, A.
    David, L.C.
    Claußen, J.
    Sulley, M.
    Adeoti, S.R.
    Abdulsalam, T.
    Gerth, S.
    Zeeman, S.C.
    Gisel, A.
    Stavolone, L.
    Type
    Journal Article
    Review Status
    Peer Review
    Target Audience
    Scientists
    Metadata
    Show full item record
    Abstract/Description
    Despite the importance of storage root (SR) organs for cassava and the other root crops yield, their developmental origin is poorly understood. Here we use multiple approaches to shed light on the initial stages of root development demonstrating that SR and fibrous roots (FR) follow different rhizogenic processes. Transcriptome analysis carried out on roots collected before, during and after root bulking highlighted early and specific activation of a number of functions essential for root swelling and identified root-specific genes able to effectively discriminate emerging FR and SR. Starch and sugars start to accumulate at a higher rate in SR before they swell but only after parenchyma tissue has been produced. Finally, using non-destructive computed tomography measurements, we show that SR (but not FR) contain, since their emergence from the stem, an inner channel structure in continuity with the stem secondary xylem, indicating that SR derive from a distinct rhizogenic process compared with FR.
    Acknowledgements
    The authors are grateful to Anetor Omonuwa and Brandon Harris for excellent technical assistance, and to Peter Iluebbey and IITA Cassava Breeding Unit for logistic support on the fieldwork. This study was supported by the Bill and Melinda Gates Foundation through the grant INV-008053 'Metabolic Engineering of Carbon Pathways to Enhance Yield of Root and Tuber Crops' and Roots and Tubers Programme (RTB) of the Consultative Group on International Agricultural Research (CGIAR).
    https://dx.doi.org/10.1111/pce.14300
    Multi standard citation
    Permanent link to this item
    https://hdl.handle.net/20.500.12478/7441
    IITA Authors ORCID
    ANDREAS GISELhttps://orcid.org/0000-0001-7218-9488
    LIVIA STAVOLONEhttps://orcid.org/0000-0002-0691-1302
    Digital Object Identifier (DOI)
    https://dx.doi.org/10.1111/pce.14300
    Research Themes
    Biotech and Plant Breeding
    IITA Subjects
    Agronomy; Cassava; Food Security; Plant Breeding; Plant Production
    Agrovoc Terms
    Roots; Development; Cassava; Manihot Esculenta; Dna; Rna
    Regions
    Africa; West Africa
    Countries
    Nigeria
    Hubs
    Headquarters and Western Africa Hub
    Journals
    Plant, Cell and Environment
    Collections
    • Journal and Journal Articles4835
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