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@ARTICLE{Acebron:885466,
      author       = {Acebron, Kelvin and Matsubara, Shizue and Jedmowski,
                      Christoph and Emin, Dzhaner and Muller, Onno and Rascher,
                      Uwe},
      title        = {{D}iurnal dynamics of non‐photochemical quenching in
                      {A}rabidopsis npq mutants assessed by solar‐induced
                      fluorescence and reflectance measurements in the field},
      journal      = {The new phytologist},
      volume       = {229},
      number       = {4},
      issn         = {1469-8137},
      address      = {Oxford [u.a.]},
      publisher    = {Wiley-Blackwell},
      reportid     = {FZJ-2020-03849},
      pages        = {2104-2119},
      year         = {2021},
      abstract     = {Solar‐induced fluorescence (SIF) is highly relevant in
                      mapping photosynthesis from remote‐sensing platforms. This
                      requires linking SIF to photosynthesis and understanding the
                      role of nonphotochemical quenching (NPQ) mechanisms under
                      field conditions. Hence, active and passive fluorescence
                      were measured in Arabidopsis with altered NPQ in outdoor
                      conditions. Plants with mutations in either violaxanthin
                      de‐epoxidase (npq1) or PsbS protein (npq4) exhibited
                      reduced NPQ capacity. Parallel measurements of NPQ,
                      photosystem II efficiency, SIF and spectral reflectance (ρ)
                      were conducted diurnally on one sunny summer day and two
                      consecutive days during a simulated cold spell. Results
                      showed that both npq mutants exhibited higher levels of SIF
                      compared to wild‐type plants. Changes in reflectance were
                      related to changes in the
                      violaxanthin–antheraxanthin–zeaxanthin cycle and not to
                      PsbS‐mediated conformational changes. When plants were
                      exposed to cold temperatures, rapid onset of photoinhibition
                      strongly quenched SIF in all lines. Using
                      well‐characterized Arabidopsis npq mutants, we showed for
                      the first time the quantitative link between SIF,
                      photosynthetic efficiency, NPQ components and leaf
                      reflectance. We discuss the functional potential and
                      limitations of SIF and reflectance measurements for
                      estimating photosynthetic efficiency and NPQ in the field.},
      cin          = {IBG-2},
      ddc          = {580},
      cid          = {I:(DE-Juel1)IBG-2-20101118},
      pnm          = {582 - Plant Science (POF3-582) / 2171 - Biological and
                      environmental resources for sustainable use (POF4-217)},
      pid          = {G:(DE-HGF)POF3-582 / G:(DE-HGF)POF4-2171},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {33020945},
      UT           = {WOS:000584802700001},
      doi          = {10.1111/nph.16984},
      url          = {https://juser.fz-juelich.de/record/885466},
}