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@ARTICLE{Bergstrsser:186688,
      author       = {Bergsträsser, Sergej and Fanourakis, Dimitrios and
                      Schmittgen, Simone and Cendrero, Pilar and Jansen, Marcus
                      and Scharr, Hanno and Rascher, Uwe},
      title        = {{H}yper{ART}: non-invasive quantification of leaf traits
                      using hyperspectral absorption-reflectance-transmittance
                      imaging},
      journal      = {Plant methods},
      volume       = {11},
      number       = {1},
      issn         = {1746-4811},
      address      = {London},
      publisher    = {BioMed Central},
      reportid     = {FZJ-2015-00760},
      pages        = {1},
      year         = {2015},
      abstract     = {BackgroundCombined assessment of leaf reflectance and
                      transmittance is currently limited to spot (point)
                      measurements. This study introduces a tailor-made
                      hyperspectral absorption-reflectance-transmittance imaging
                      (HyperART) system, yielding a non-invasive determination of
                      both reflectance and transmittance of the whole leaf. We
                      addressed its applicability for analysing plant traits, i.e.
                      assessing Cercospora beticola disease severity or leaf
                      chlorophyll content. To test the accuracy of the obtained
                      data, these were compared with reflectance and transmittance
                      measurements of selected leaves acquired by the point
                      spectroradiometer ASD FieldSpec, equipped with the FluoWat
                      device.ResultsThe working principle of the HyperART system
                      relies on the upward redirection of transmitted and
                      reflected light (range of 400 to 2500 nm) of a plant sample
                      towards two line scanners. By using both the reflectance and
                      transmittance image, an image of leaf absorption can be
                      calculated. The comparison with the dynamically
                      high-resolution ASD FieldSpec data showed good correlation,
                      underlying the accuracy of the HyperART system. Our
                      experiments showed that variation in both leaf chlorophyll
                      content of four different crop species, due to different
                      fertilization regimes during growth, and fungal symptoms on
                      sugar beet leaves could be accurately estimated and
                      monitored. The use of leaf reflectance and transmittance, as
                      well as their sum (by which the non-absorbed radiation is
                      calculated) obtained by the HyperART system gave
                      considerably improved results in classification of
                      Cercospora leaf spot disease and determination of
                      chlorophyll content.ConclusionsThe HyperART system offers
                      the possibility for non-invasive and accurate mapping of
                      leaf transmittance and absorption, significantly expanding
                      the applicability of reflectance, based on mapping
                      spectroscopy, in plant sciences. Therefore, the HyperART
                      system may be readily employed for non-invasive
                      determination of the spatio-temporal dynamics of various
                      plant properties.},
      cin          = {IBG-2},
      ddc          = {580},
      cid          = {I:(DE-Juel1)IBG-2-20101118},
      pnm          = {582 - Plant Science (POF3-582)},
      pid          = {G:(DE-HGF)POF3-582},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000350406000001},
      pubmed       = {pmid:25649124},
      doi          = {10.1186/s13007-015-0043-0},
      url          = {https://juser.fz-juelich.de/record/186688},
}