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@ARTICLE{Krause:21659,
      author       = {Krause, G.H. and Winter, K. and Matsubara, S. and Krause,
                      B. and Jahns, P. and Virgo, A. and Aranda, J. and García,
                      M.},
      title        = {{P}hotosynthesis, photoprotection, and growth of
                      shade-tolerant tropical tree seedlings under full sunlight},
      journal      = {Photosynthesis research},
      volume       = {113},
      number       = {1-3},
      issn         = {0166-8595},
      address      = {Dordrecht [u.a.]},
      publisher    = {Springer Science + Business Media B.V},
      reportid     = {PreJuSER-21659},
      pages        = {273-285},
      year         = {2012},
      note         = {We thank Maria Graf for competent assistance in HPLC
                      analyses. The study was supported by the Smithsonian
                      Tropical Research Institute, Panama, and Deutsche
                      Forschungsgemeinschaft (DFG), Germany.},
      abstract     = {High solar radiation in the tropics is known to cause
                      transient reduction in photosystem II (PSII) efficiency and
                      CO(2) assimilation in sun-exposed leaves, but little is
                      known how these responses affect the actual growth
                      performance of tropical plants. The present study addresses
                      this question. Seedlings of five woody neotropical forest
                      species were cultivated under full sunlight and shaded
                      conditions. In full sunlight, strong photoinhibition of PSII
                      at midday was documented for the late-successional tree
                      species Ormosia macrocalyx and Tetragastris panamensis and
                      the understory/forest gap species, Piper reticulatum. In
                      leaves of O. macrocalyx, PSII inhibition was accompanied by
                      substantial midday depression of net CO(2) assimilation.
                      Leaves of all species had increased pools of
                      violaxanthin-cycle pigments. Other features of
                      photoacclimation, such as increased Chl a/b ratio and
                      contents of lutein, β-carotene and tocopherol varied. High
                      light caused strong increase of tocopherol in leaves of T.
                      panamensis and another late-successional species, Virola
                      surinamensis. O. macrocalyx had low contents of tocopherol
                      and UV-absorbing substances. Under full sunlight, biomass
                      accumulation was not reduced in seedlings of T. panamensis,
                      P. reticulatum, and V. surinamensis, but O. macrocalyx
                      exhibited substantial growth inhibition. In the highly
                      shade-tolerant understory species Psychotria marginata, full
                      sunlight caused strongly reduced growth of most individuals.
                      However, some plants showed relatively high growth rates
                      under full sun approaching those of seedlings at $40 \%$
                      ambient irradiance. It is concluded that shade-tolerant
                      tropical tree seedlings can achieve efficient
                      photoacclimation and high growth rates in full sunlight.},
      keywords     = {J (WoSType)},
      cin          = {IBG-2},
      ddc          = {580},
      cid          = {I:(DE-Juel1)IBG-2-20101118},
      pnm          = {Terrestrische Umwelt},
      pid          = {G:(DE-Juel1)FUEK407},
      shelfmark    = {Plant Sciences},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {pmid:22466529},
      UT           = {WOS:000308188800020},
      doi          = {10.1007/s11120-012-9731-z},
      url          = {https://juser.fz-juelich.de/record/21659},
}