Abstract
Light intensity is a crucial factor impacting the cost-efficiency of controlled environment agriculture (CEA). Broccoli microgreens were cultivated under different photosynthetic photon flux densities: 50, 100, and 150 μmol•m –2 •s –1 with white light-emitting diodes (LEDs), and an additional far-red (FR) light supplement (20% of total photon flux density) at the 50 μmol•m –2 •s –1 intensity. This study examines how low light intensity influences the chemical profile and glucosinolate accumulation in broccoli microgreens through both nontargeted and targeted metabolomics with molecular networking analysis. The analysis identified 28 glucosinolates and 23 phenolic compounds with targeted quantification of 12 glucosinolates. The results showed that FR light supplementation significantly increased the total glucosinolate content compared to white light-only treatments, while similar glucosinolate levels were found across the different white light intensities. These findings provide valuable insights for optimizing LED light intensity to enhance glucosinolate accumulation in broccoli microgreens, thus promoting more efficient energy use in CEA.
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Claims 5
Claim · model-written summary
The metabolomic analysis identified 28 glucosinolates.
Verbatim
e0“The analysis identified 28 glucosinolates”
t0“Broccoli Microgreen”
Claim · model-written summary
The metabolomic analysis identified 23 phenolic compounds.
Verbatim
e0“23 phenolic compounds”
t0“Broccoli Microgreen”
Claim · model-written summary
Twelve glucosinolates were quantified by targeted analysis.
Verbatim
e0“targeted quantification of 12 glucosinolates”
t0“Broccoli Microgreen”
Claim · model-written summary
Far-red supplementation significantly increased total glucosinolate content relative to white light alone.
Verbatim
e0“FR light supplementation significantly increased the total glucosinolate content compared to white light-only treatments”
t0“Broccoli Microgreen”
Claim · model-written summary
White light intensities yielded similar glucosinolate levels.
Verbatim
e0“similar glucosinolate levels were found across the different white light intensities”
t0“Broccoli Microgreen”