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@ARTICLE{Behn:15910,
      author       = {Behn, H. and Tittmann, S. and Walter, A. and Schurr, U. and
                      Noga, G. and Ulbrich, A.},
      title        = {{UV}-{B} {T}ransmittance of {G}reenhouse {C}overing
                      {M}aterials {A}ffects {G}rowth and {F}lavonoid {C}ontent of
                      {L}ettuce seedlings},
      journal      = {European Journal of Horticultural Science},
      volume       = {75},
      reportid     = {PreJuSER-15910},
      pages        = {259 - 268},
      year         = {2010},
      note         = {The authors thank technical staff members of the
                      Versuchsgut Marhof for plant cultivation, C. Wieland for
                      taking images and harvesting of lettuce plants. Transmission
                      data were kindly provided by CENTROSOLAR GLAS GmbH $\&$ Co.
                      KG, Furth, Germany. The work was funded by grants of the
                      Bundesministerium fur Bildung und Forschung (project
                      0330724B, 0330724C). Susanne Tittmann acknowledges the
                      support of her PhD thesis at the Heinrich-Heine-University
                      Dusseldorf.},
      abstract     = {In Europe, lettuce (Lactuca sativa L., Asteraceae) is
                      commonly raised in greenhouses and transplanted to the field
                      at the age of two to four weeks in order to prolong the
                      growing season. The sudden exposure to outdoor conditions
                      including altered temperature, radiation levels and rainfall
                      events is extremely stressful for non-acclimated seedlings.
                      Particularly the increase in ultraviolet-B radiation is
                      considered a serious threat. A new approach to pre-acclimate
                      seedlings to ambient ultraviolet-B radiation is the use of
                      ultraviolet-B transparent covering materials. In order to
                      estimate the benefit of UV-B pre-acclimation, lettuce plants
                      were raised in greenhouses covered with three different
                      materials varying in ultraviolet-B transmittance and
                      transplanted to the field at the age of three weeks.
                      Ultraviolet-B exposure during the greenhouse period led to a
                      reduction in growth (leaf length, leaf area and leaf number)
                      and an increase in flavonoid content. Transplantation to the
                      field induced a strong enhancement in flavonoid content and
                      a severe growth reduction overriding differences between
                      UV-B treatment groups within a few days. At the time of
                      harvest plant fresh weight was therefore independent from
                      previous ultraviolet-B treatment. Effects of UV-B
                      acclimation on plant performance immediately after
                      transplantation require more detailed examination.},
      keywords     = {J (WoSType)},
      cin          = {IBG-2},
      cid          = {I:(DE-Juel1)IBG-2-20101118},
      pnm          = {Terrestrische Umwelt},
      pid          = {G:(DE-Juel1)FUEK407},
      shelfmark    = {Horticulture},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000288310100005},
      url          = {https://juser.fz-juelich.de/record/15910},
}