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@INPROCEEDINGS{Genzel:916748,
      author       = {Genzel, Franziska and Dicke, Max Daniel and Thiele, Björn
                      and Wormit, Alexandra and Wiese-Klinkenberg, Anika},
      title        = {{T}argeted application of abiotic stress as a tool to
                      trigger biosynthesis of bioactive flavonoids in {C}apsicum
                      leaves},
      reportid     = {FZJ-2023-00075},
      year         = {2022},
      abstract     = {Abiotic stresses are usually considered as limiting factors
                      in the horticultural production of bell pepper. However, the
                      enhancing effect of abiotic stress on the biosynthesis of
                      plant secondary metabolites bears the potential for
                      production of valuable bioactive plant compounds via
                      targeted application of abiotic stress. At the end of the
                      annual production cycle of bell pepper, high amounts of
                      residual leaf material remain in the greenhouse. Since bell
                      pepper leaves are known to contain pharmaceutically
                      interesting compounds like the flavonoids cynaroside and
                      graveobioside A (Ellenberger et al., 2020), the residual
                      foliar plant material represents a potential source for
                      valuable metabolites, which could be extracted following the
                      horticultural production of fruits. However, the
                      concentration of those metabolites is often too low for an
                      economically feasible extraction. Therefore, the
                      interdisciplinary project TaReCa aimed at increasing the
                      biosynthesis of those valuable metabolites via application
                      of abiotic stress.To identify suitable abiotic stresses
                      strongly triggering the accumulation of the target
                      flavonoids cynaroside and graveobioside A, various stress
                      treatments (e.g. salinity, temperature stress, UV stress,
                      nitrogen deficiency) were applied in different durations,
                      intensities, and combinations to young bell pepper and
                      chilli plants. Throughout treatments, stress responses of
                      plants were monitored noninvasively using phenotyping
                      methods based on leaf colour, fluorescence, and reflectance
                      to develop an easy-to-use method to predict changes in the
                      leaf content of target flavonoids in production greenhouses.
                      With a combination of salt and moderate cold stress, we were
                      able to increase the target metabolites graveobioside A and
                      cynaroside 3.6- and 23-fold in bell pepper leaves of young
                      plants reaching comparable or even higher concentrations
                      than those described for plants commonly used as sources for
                      these metabolites. This novel approach of valorization of
                      horticultural plant residuals has the potential to add value
                      to the bell pepper production.},
      month         = {Mar},
      date          = {2022-03-29},
      organization  = {HortStresses: Understanding and
                       managing biotic and abiotic stresses of
                       horticultural crops, Reading (UK), 29
                       Mar 2022 - 30 Mar 2022},
      subtyp        = {Other},
      cin          = {IBG-4},
      cid          = {I:(DE-Juel1)IBG-4-20200403},
      pnm          = {2171 - Biological and environmental resources for
                      sustainable use (POF4-217) / Maßgeschneiderte Inhaltsstoffe
                      - Verbundvorhaben: 'Maßschneidern des Sekundärmetabolismus
                      in gartenbaulicher Restbiomasse und Kaskadennutzung für
                      eine ressourceneffiziente Produktion von wertvollen
                      bioaktiven Substanzen (TaReCa)-Teilprojekt B' (031B0361B)},
      pid          = {G:(DE-HGF)POF4-2171 / G:(BMBF)031B0361B},
      typ          = {PUB:(DE-HGF)6},
      url          = {https://juser.fz-juelich.de/record/916748},
}