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
Preharvest LED effects varied by species and decreased during storage.
Verbatim
e0“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 gave kale the highest phenolic, chlorophyll and carotenoid contents.
- Taxon
- kale
Brassica oleracea var. viridise0 - Treatment
- BRV treatmente0
- Outcome
- TPC, CHL, and CARe0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“BRV treatment led to the highest TPC, CHL, and CAR in kale”
Claim · model-written summary
BRV increased broccoli DPPH scavenging activity.
- Taxon
- broccoli
Brassica oleracea var. italicae0 - Treatment
- BRV treatmente0
- Outcome
- DPPH radical scavenging activitye0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“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
Kale protein content was highest under BR665 light.
- Taxon
- kaleBrassica oleracea var. viridise0
- Treatment
- BR665e0
- Outcome
- TP contente0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The TP content was the highest in kale and broccoli under BR665 and BR lights, respectively”
Claim · model-written summary
Broccoli protein content was highest under BR light.
- Taxon
- broccoliBrassica oleracea var. italicae0
- Treatment
- BRe0
- Outcome
- TP contente0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The TP content was the highest in kale and broccoli under BR665 and BR lights, respectively”
Claim · model-written summary
BR light had similar effects on antioxidant capacity at harvest in both microgreens.
- Taxon
- microgreense0
- Treatment
- BR lighte0
- Outcome
- antioxidant capacitye0
- Direction
- similare0
- Qualifier
- at harvest daye0
Not reportedComparator
Verbatim
e0“BR light had a similar impact on the antioxidant capacity at harvest day for both microgreens species”
Claim · model-written summary
BR665 influenced phenolics, chlorophyll and carotenoids one day after harvest.
- Taxon
- microgreense1
- Treatment
- BR665e0
- Outcome
- TPC, CHL, and CAR contentse0
- Qualifier
- after one day from harveste0
Not reportedComparatorDirection
Verbatim
e0“The TPC, CHL, and CAR contents were influenced by BR665 after one day from harvest”
e1“varied among microgreens species”
The same questions in other papers
brassinolide · quality: protein · Brassica oleracea (wild cabbage)Results agree
1 paper in the same direction as this paper
- positive
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.