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@ARTICLE{Matsubara:56263,
      author       = {Matsubara, S. and Morosinotto, T. and Osmond, C. B. and
                      Bassi, R.},
      title        = {{S}hort- and long-term operation of the lutein-epoxide
                      cycle in light-harvesting antenna complexes},
      journal      = {Plant physiology},
      volume       = {144},
      issn         = {0032-0889},
      address      = {Rockville, Md.: Soc.},
      publisher    = {JSTOR},
      reportid     = {PreJuSER-56263},
      pages        = {926 - 941},
      year         = {2007},
      note         = {Record converted from VDB: 12.11.2012},
      abstract     = {The lutein-5,6-epoxide (Lx) cycle operates in some plants
                      between lutein (L) and its monoepoxide, Lx. Whereas recent
                      studies have established the photoprotective roles of the
                      analogous violaxanthin cycle, physiological functions of the
                      Lx cycle are still unknown. In this article, we investigated
                      the operation of the Lx cycle in light-harvesting antenna
                      complexes (Lhcs) of Inga sapindoides Willd, a tropical tree
                      legume accumulating substantial Lx in shade leaves, to
                      identify the xanthophyll-binding sites involved in short-
                      and long-term responses of the Lx cycle and to analyze the
                      effects on light-harvesting efficiency. In shade leaves, Lx
                      was converted into L upon light exposure, which then
                      replaced Lx in the peripheral V1 site in trimeric Lhcs and
                      the internal L2 site in both monomeric and trimeric Lhcs,
                      leading to xanthophyll composition resembling sun-type Lhcs.
                      Similar to the violaxanthin cycle, the Lx cycle was
                      operating in both photosystems, yet the light-induced Lx -->
                      L conversion was not reversible overnight. Interestingly,
                      the experiments using recombinant Lhcb5 reconstituted with
                      different Lx and/or L levels showed that reconstitution with
                      Lx results in a significantly higher fluorescence yield due
                      to higher energy transfer efficiencies among chlorophyll
                      (Chl) a molecules, as well as from xanthophylls to Chl a.
                      Furthermore, the spectroscopic analyses of photosystem
                      I-LHCI from I. sapindoides revealed prominent red-most Chl
                      forms, having the lowest energy level thus far reported for
                      higher plants, along with reduced energy transfer efficiency
                      from antenna pigments to Chl a. These results are discussed
                      in the context of photoacclimation and shade adaptation.},
      keywords     = {Adaptation, Physiological / Carotenoids: metabolism /
                      Chlorophyll: metabolism / Fabaceae: metabolism /
                      Light-Harvesting Protein Complexes: metabolism / Lutein:
                      analogs $\&$ derivatives / Lutein: metabolism / Photosystem
                      I Protein Complex: metabolism / Plant Leaves: metabolism /
                      Recombinant Proteins: metabolism / Spectrum Analysis /
                      Sunlight / Thylakoids: metabolism / Time Factors /
                      Light-Harvesting Protein Complexes (NLM Chemicals) /
                      Photosystem I Protein Complex (NLM Chemicals) / Recombinant
                      Proteins (NLM Chemicals) / lutein-5,6-epoxide (NLM
                      Chemicals) / Lutein (NLM Chemicals) / Chlorophyll (NLM
                      Chemicals) / Carotenoids (NLM Chemicals) / 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},
      pubmed       = {pmid:17384157},
      pmc          = {pmc:PMC1914152},
      UT           = {WOS:000247075000036},
      doi          = {10.1104/pp.107.099077},
      url          = {https://juser.fz-juelich.de/record/56263},
}