Journal
ACS OMEGA
Volume 4, Issue 21, Pages 19071-19080Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsomega.9b01462
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Funding
- Ministry of Innovation, Science and Research of the German State of North Rhine-Westphalia in the framework of the Bioeconomy Science Center (BioSC, NRW Strategieprojekt) [313/323-400-002 13]
- Deutsche Forschungsgemeinschaft [INST 222/1077-1 FUGG]
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At the end of the annual horticultural production cycle of greenhouse-grown crops, large quantities of residual biomass are discarded. Here, we propose a new value chain to utilize horticultural leaf biomass for the extraction of secondary metabolites. To increase the secondary metabolite content of leaves, greenhouse-grown crop plants were exposed to low-cost abiotic stress treatments after the last fruit harvest. As proof of concept, we evaluated the production of the flavonoid rutin in tomato plants subjected to nitrogen deficiency. In an interdisciplinary approach, we observed the steady accumulation of rutin in young plants under nitrogen deficiency, tested the applicability of nitrogen deficiency in a commercial-like greenhouse, developed a high efficiency extraction for rutin, and evaluated the acceptance of the proposed value chain by its key actors economically. On the basis of the positive interdisciplinary evaluation, we identified opportunities and challenges for the successful establishment of horticultural leaf biomass as a novel source for secondary metabolites.
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