Abstract
This study aims to evaluate the influence of the pre-harvest light-emitting diode (LED) spectrum on the metabolic indices in microgreens during post-harvest storage. Broccoli ‘Micro Green’ and kale ‘Dwarf Blue Green’ microgreens were cultivated in a growth chamber under the photosynthetic photon flux density (PPFD) of 200 µmol m−2 s−1 provided by violet (V, 405 nm), blue (B, 447 nm), green (G, 520 nm), and red (R638, R665, R—638 nm and 665 nm, or both, respectively) LEDs in combinations of BR638, BR665, BR, BRV, and BRG. We evaluated the total phenolic content (TPC), total protein (TP), chlorophyll (CHL), and carotenoid (CAR) contents, and the ferric-reducing antioxidant power (FRAP) and ABTS and DPPH free radical scavenging activities at harvest and during storage at 4 °C for five days in the dark. The results demonstrate that the influence of pre-harvest LEDs on the metabolic indices varied among microgreens species and decreased consistently throughout the post-harvest period. BRV treatment led to the highest TPC, CHL, and CAR in kale, and increased the DPPH radical scavenging activity in broccoli. The TP content was the highest in kale and broccoli under BR665 and BR lights, respectively. In addition, BR light had a similar impact on the antioxidant capacity at harvest day for both microgreens species. The TPC, CHL, and CAR contents were influenced by BR665 after one day from harvest.
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Claims 7
Claim · model-written summary
The effect of pre-harvest LEDs on metabolic indices differed among microgreens species and decreased through post-harvest storage.
Verbatim
e0“The results demonstrate that the influence of pre-harvest LEDs on the metabolic indices varied among microgreens species and decreased consistently throughout the post-harvest period”
Claim · model-written summary
BRV treatment gave kale the highest TPC, CHL and CAR contents.
- Taxon
- kale
Brassica oleracea var. viridise1 - Treatment
- BRV treatmente1
- Outcome
- TPC, CHL, and CARe1
- Direction
- higheste1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“BRV treatment led to the highest TPC, CHL, and CAR in kale, and increased the DPPH radical scavenging activity in broccoli”
Claim · model-written summary
BRV treatment increased the DPPH radical scavenging activity of broccoli.
- Taxon
- broccoli
Brassica oleracea var. italicae1 - Treatment
- BRV treatmente1
- Outcome
- DPPH radical scavenging activitye1
- Direction
- increasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“BRV treatment led to the highest TPC, CHL, and CAR in kale, and increased the DPPH radical scavenging activity in broccoli”
Claim · model-written summary
Under BR665 light, kale had the highest total protein content.
- Taxon
- kaleBrassica oleracea var. viridise2
- Treatment
- BR665e2
- Outcome
- TP contente2
- Direction
- higheste2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“The TP content was the highest in kale and broccoli under BR665 and BR lights, respectively”
Claim · model-written summary
Under BR light, broccoli had the highest total protein content.
- Taxon
- broccoliBrassica oleracea var. italicae2
- Treatment
- BR lightse2
- Outcome
- TP contente2
- Direction
- higheste2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“The TP content was the highest in kale and broccoli under BR665 and BR lights, respectively”
Claim · model-written summary
BR light had a similar impact on antioxidant capacity at harvest in both microgreens species.
- Taxon
- both microgreens speciese3
- Treatment
- BR lighte3
- Outcome
- antioxidant capacitye3
- Direction
- no_changeinferrede3
- Qualifier
- at harvest daye3
Not reportedComparator
Verbatim
e3“BR light had a similar impact on the antioxidant capacity at harvest day for both microgreens species”
Claim · model-written summary
TPC, CHL and CAR contents of the microgreens were influenced by BR665 one day after harvest.
- Taxon
- Microgreenst0
- Treatment
- BR665e4
- Outcome
- TPC, CHL, and CAR contentse4
- Qualifier
- after one day from harveste4
Not reportedComparatorDirection
Verbatim
t0“Microgreens”
e4“The TPC, CHL, and CAR contents were influenced by BR665 after one day from harvest”
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Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.