Gibberellin a <inf>1</inf> metabolism contributes to the control of photoperiod-mediated tuberization in potato

Jordi Bou-Torrent, Jaime F. Martínez-García, José Luis García-Martínez, Salomé Prat

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    30 Citations (Scopus)

    Abstract

    Some potato species require a short-day (SD) photoperiod for tuberization, a process that is negatively affected by gibberellins (GAs). Here we report the isolation of StGA3ox2, a gene encoding a GA 3-oxidase, whose expression is increased in the aerial parts and is repressed in the stolons after transfer of photoperiod-dependent potato plants to SD conditions. Over-expression of StGA3ox2 under control of constitutive or leaf-specific promoters results in taller plants which, in contrast to StGA20ox1 over-expressers previously reported, tuberize earlier under SD conditions than the controls. By contrast, StGA3ox2 tuber-specific over-expression results in non-elongated plants with slightly delayed tuber induction. Together, our experiments support that StGA3ox2 expression and gibberellin metabolism significantly contribute to the tuberization time in strictly photoperiod-dependent potato plants. © 2011 Bou-Torrent et al.
    Original languageEnglish
    Article numbere24458
    JournalPLoS ONE
    Volume6
    Issue number9
    DOIs
    Publication statusPublished - 22 Sep 2011

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