Journal
CROP JOURNAL
Volume 6, Issue 4, Pages 426-434Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.cj.2017.12.001
Keywords
Drought stress; Faba bean; L-DOPA; Processing methods; Supplement N
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Funding
- Northeast Sustainable Agriculture Research and Education [GNE14-078]
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Faba bean (Vicia faba L.) has been identified as a rich source of L-DOPA, which is used in treating Parkinson's disease. Biosynthesis and accumulation of active substances such as L-DOPA in plant tissues may interact with growing conditions and processing methods. Accumulation trends of L-DOPA in various faba bean organs and the effect of drought stress and N fertilization on L-DOPA content were studied in a field and two greenhouse experiments. The influence of various processing methods on L-DOPA content of faba bean tissues was evaluated. The highest L-DOPA content was detected in fresh leaves (22.4 mg g(-1)) followed by flowers, young pods, mature seeds, and roots. Regardless of processing method, L-DOPA concentration in faba bean tissues was significantly reduced when tissues were boiled or dried. Among various methods of processing, freezing had the lowest detrimental effect, reducing L-DOPA concentrations by 24.1% and 21.1% in leaves and seeds, respectively. Drought stress elevated L-DOPA concentration, and maximum L-DOPA (23.3 mg g(-1) of biomass) was extracted from plants grown under severe drought stress. However, L-DOPA yield (L-DOPA concentration x biomass) was compromised, owing to the adverse influence of drought stress on dry matter production. No significant difference in L-DOPA concentration was detected among various N application rates. (C) 2018 Crop Science Society of China and Institute of Crop Science, CAAS. Production and hosting by Elsevier B.V.
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