Phenylalanine and LED lights enhance phenolic compound production in Tartary buckwheat sprouts.
Level 5 - mechanism / opinion, no new human data
Laboratory plant/bench experiment without human data
PubMed 25660878 · doi:10.1016/j.foodchem.2014.12.094
What was done
Researchers investigated the effects of various L-phenylalanine (L-Phe) concentrations and different LED light wavelengths (including Red+Blue, white, and blue) on the accumulation of phenolic compounds (chlorogenic acid, vitexin, rutin, quercetin, cyanidin 3-O-glucoside, cyanidin 3-O-rutinoside) and gene expression (FtDFR, FtANS) in Tartary buckwheat sprouts.
What was found
The optimal L-Phe concentration for synthesis of total and individual phenolics was 5 mM. Red+Blue and white lights produced the highest amounts of rutin (53.09 mg/g dry weight [DW]) and chlorogenic acid (5.62 mg/g DW). Blue light resulted in the highest total anthocyanin content at 9.12 mg/g DW (a 1.5-fold increase). Treatment with L-Phe increased the expression of regulatory genes FtDFR and FtANS by 7.1-fold.
Why it matters
These findings identify an agronomic method combining nutrient supplementation and targeted LED spectra to enhance bioactive phenolic and flavonoid yields during sprout cultivation.
Limits
The study is restricted to in vitro/laboratory plant cultivation with no human or in vivo data. The abstract omits sample sizes, replicate numbers, variance measures, and specific quantification for several measured compounds including vitexin and quercetin.
Cited by
- supports Sprouting Tartary Buckwheat under a 450 nanometer light spectrum at neutral pH in sterile conditions yields threefold higher phytochemical levels than the flour.