Počet záznamů: 1

Role of PIN-mediated auxin efflux in apical hook development of Arabidopsis thaliana

  1. 1.
    0347625 - UEB-Q 2011 RIV GB eng J - Článek v odborném periodiku
    Žádníková, P. - Petrášek, Jan - Marhavý, P. - Raz, V. - Vandenbussche, F. - Ding, Z. - Schwarzerová, K. - Morita, M. T. - Tasaka, M. - Hejátko, J. - Van Der Straeten, D. - Friml, J. - Benková, E.
    Role of PIN-mediated auxin efflux in apical hook development of Arabidopsis thaliana.
    Development. Roč. 137, č. 4 (2010), s. 607-617 ISSN 0950-1991
    Grant CEP: GA MŠk(CZ) LC06034; GA AV ČR(CZ) IAA601630703
    Výzkumný záměr: CEZ:AV0Z50380511
    Klíčová slova: PIN3 * Apical hook * Auxin
    Kód oboru RIV: EB - Genetika a molekulární biologie
    Impakt faktor: 6.898, rok: 2010

    The apical hook of dark-grown Arabidopsis seedlings is a simple structure that develops soon after germination to protect the meristem tissues during emergence through the soil and that opens upon exposure to light. Differential growth at the apical hook proceeds in three sequential steps that are regulated by multiple hormones, principally auxin and ethylene. We show that the progress of the apical hook through these developmental phases depends on the dynamic, asymmetric distribution of auxin, which is regulated by auxin efflux carriers of the PIN family. Several PIN proteins exhibited specific, partially overlapping spatial and temporal expression patterns, and their subcellular localization suggested auxin fluxes during hook development. Genetic manipulation of individual PIN activities interfered with different stages of hook development, implying that specific combinations of PIN genes are required for progress of the apical hook through the developmental phases.
    Trvalý link: http://hdl.handle.net/11104/0188367