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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},
}