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@ARTICLE{Esteban:11131,
      author       = {Esteban, R. and Matsubara, S. and Jiménez, M.S. and
                      Morales, D. and Brito, P. and Lorenzo, R. and
                      Fernández-Martín, B. and Becerril, J.M. and
                      Carcía-Plazaola, J.I.},
      title        = {{O}peration and regulation of the lutein epoxide cycle in
                      seedlings of {O}cotea foetens},
      journal      = {Functional plant biology},
      volume       = {37},
      issn         = {1445-4408},
      address      = {Collingwood, Victoria},
      publisher    = {CSIRO Publ.},
      reportid     = {PreJuSER-11131},
      pages        = {859 - 869},
      year         = {2010},
      note         = {We acknowledge B. Olascoaga (Basque Country University) for
                      help during sampling and analyses, J. M. Olano for
                      statistical advice, and the anonymous referees for their
                      valuable suggestions regarding the manuscript. R. E. and B.
                      F. M. received a fellowship from the Basque Government. R.
                      E. received a grant from the Basque Government to make a
                      visit to the ICG-3 (EC-2008-1-6). This research was
                      supported by research BFU 2007-62637 from the Ministry of
                      Education and Science of Spain, and research project
                      UPV/EHU-GVIT-299-07.},
      abstract     = {Two xanthophyll cycles are present in higher plants: the
                      ubiquitous violaxanthin (V) cycle and the taxonomically
                      restricted lutein epoxide (Lx) cycle. Conversions of V to
                      zeaxanthin (Z) in the first and Lx to lutein (L) in the
                      second happen in parallel under illumination. Unlike the V
                      cycle, in which full epoxidation is completed overnight, in
                      the Lx cycle, this reaction has been described as
                      irreversible on a daily basis in most species (the
                      'truncated' Lx cycle). However, there are some species that
                      display complete restoration of Lx overnight ('true' Lx
                      cycle). So far, little is known about the physiological
                      meaning of these two versions of the Lx cycle. Therefore, in
                      the present work, the 'true' Lx cycle operation was studied
                      in seedlings of Ocotea foetens (Aiton) Benth. under
                      controlled and field conditions. Complete overnight recovery
                      of the Lx pool in the presence of norfluorazon suggested
                      that the inter-conversions between Lx and L represent a true
                      cycle in this species. Furthermore, Lx responded dynamically
                      to environmental conditions during long-term acclimation.
                      Our data demonstrate the operation of a 'true' Lx cycle and,
                      for the first time, its potential involvement in the
                      regulation of non-photochemical quenching in situ. We
                      propose dual regulation of Lx cycle in O. foetens, in which
                      the extent of Lx restoration depends on the intensity and
                      duration of illumination.},
      keywords     = {J (WoSType)},
      cin          = {ICG-3},
      ddc          = {580},
      cid          = {I:(DE-Juel1)ICG-3-20090406},
      pnm          = {Terrestrische Umwelt},
      pid          = {G:(DE-Juel1)FUEK407},
      shelfmark    = {Plant Sciences},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000281148000007},
      doi          = {10.1071/FP10014},
      url          = {https://juser.fz-juelich.de/record/11131},
}