Synergistic strategies of sulforaphane biosynthesis and functional properties in broccoli sprouts powder obtained from sucrose stress modulation coupled with vacuum freeze-drying.
Level 5 - mechanism / opinion, no new human data
Bench and food chemistry laboratory experiment with no human subjects.
PubMed 41265122 · doi:10.1016/j.foodchem.2025.147059
What was done
Researchers evaluated the effect of methionine-sucrose stress treatments on glucoraphanin biosynthesis in 4-day-old broccoli sprouts. They subsequently assessed the quality, functional powder properties (water-holding, oil-holding, and swelling capacity), bioactive retention, and in vitro antimicrobial activity against *Escherichia coli* and *Staphylococcus aureus* following vacuum freeze-drying (VFD).
What was found
Sucrose treatment increased glucoraphanin content by 316.30% in 4-day sprouts compared to the control baseline of 9.72 mg/g. Total isothiocyanates (ITCs) increased by 42.65% and anthocyanins increased by 70.00%, alongside increased myrosinase activity and osmotic regulator expression. The resulting VFD sprout powder retained 6.00 mg/g dry weight (dw) of sulforaphane and 7.00 mg/g dw of total ITCs. Sulforaphane extracts produced bacterial inhibition zones of 16.00 mm against *E. coli* and 10.02 mm against *S. aureus*.
Why it matters
Combining sucrose stress during cultivation with vacuum freeze-drying offers a food-processing method to maximize sulforaphane yields in functional sprout powders.
Limits
This is strictly an in vitro bench-scale agricultural and food chemistry study. The abstract does not report experimental replication numbers, variance metrics, or statistical significance thresholds, and no in vivo bioavailability, metabolic, or clinical outcome data were evaluated.
Cited by
- supports Deep freezing or quick freezing broccoli sprouts and maintaining them in a frozen state during freeze-drying preserves both myrosinase and glucosinolates by preventing enzymatic contact.