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@ARTICLE{Rascher:47223,
      author       = {Rascher, U. and Nichol, C. J. and Small, C. and Hendricks,
                      L.},
      title        = {{M}onitoring spatio-temporal dynamics of photosynthesis
                      with a portable hyperspectral imaging system},
      journal      = {Photogrammetric engineering $\&$ remote sensing},
      volume       = {73},
      issn         = {0099-1112},
      address      = {Bethesda, Md.},
      publisher    = {ASPRS},
      reportid     = {PreJuSER-47223},
      pages        = {45 - 56},
      year         = {2007},
      note         = {Record converted from VDB: 12.11.2012},
      abstract     = {Photosynthetic efficiency of higher plants dynamically
                      adapts to changing light intensity and is greatly influenced
                      by stress, such as water stress. We tested a new portable
                      hyperspectral imaging system, the SOC-700, manufactured by
                      Surface Optics, which produces 12-bit reflectance images
                      between 440 nm and 880 nm with a 4 nm spectral resolution.
                      We quantified the reflectance properties and photochemical
                      reflectance index (PRI) during light adaptation of
                      genetically modified Arabidopsis thaliana (L.) Heynh. plants
                      lacking or over-expressing the PsbS protein, an essential
                      component of the mechanism of non-photochemical dissipation.
                      In a second experiment, PRI images of gradually water
                      stressed leaves were compared to leaf-level measurements of
                      reflectance using a second commercially available
                      spectrometer, and chlorophyll fluorescence to detect
                      dynamic, photosynthesis correlated changes in reflectance
                      and PRI.In both experiments PRI measured with the SOC-700
                      changed, reflecting the biochemical adaptation of the
                      photosynthetic apparatus to high light intensity (dynamic
                      changes within minutes) and the gradual deactivation of
                      photosynthesis during drying (changes within hours). The
                      quantum efficiency of photosystem II (Delta F/F-m') and
                      non-photochemical energy dissipation (NPQ) measured from
                      chlorophyll fluorescence, were strongly correlated with PRI.
                      Leaf area Piu values estimated from individual pixel spectra
                      of the SOC-700 quantified photosynthetic efficiency more
                      thoroughly than PRI values calculated from point
                      measurements using the hand-held GER-1500. The applications,
                      limitations, and potential of the SOC-700 for plant
                      eco-physiology and remote sensing are also discussed.},
      keywords     = {J (WoSType)},
      cin          = {ICG-3},
      ddc          = {910},
      cid          = {I:(DE-Juel1)VDB142},
      pnm          = {Terrestrische Umwelt},
      pid          = {G:(DE-Juel1)FUEK407},
      shelfmark    = {Geography, Physical / Geosciences, Multidisciplinary /
                      Remote Sensing / Imaging Science $\&$ Photographic
                      Technology},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000243360700005},
      url          = {https://juser.fz-juelich.de/record/47223},
}