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The Influence of Pre-Harvest LEDs on Phytochemical Constituents and Antioxidant Activity of Microgreens during Short-Term Storage
This study aims to evaluate the influence of the pre-harvest light-emitting diode (LED) spectrum on the metabolic indices in microgreens during post-harves
Viktorija Vaštakaitė‐Kairienė, Sigita Jurkonienė, Neringa Rasiukevičiūtė, R. Karklelienė, G. Samuolienė
Agronomy · 2023 · https://doi.org/10.3390/agronomy13082188
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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How to credit this work
Viktorija Vaštakaitė‐Kairienė; Sigita Jurkonienė; Neringa Rasiukevičiūtė; R. Karklelienė; G. Samuolienė (2023). The Influence of Pre-Harvest LEDs on Phytochemical Constituents and Antioxidant Activity of Microgreens during Short-Term Storage. Agronomy. https://doi.org/10.3390/agronomy13082188 Licensed under Creative Commons Attribution 4.0 (https://creativecommons.org/licenses/by/4.0/). Hosted by EVEC Athens (microgreens.org.gr). No changes were made to this article. Provided as-is, without warranties. EVEC Athens is not affiliated with, and this copy is not endorsed by, the authors or the publisher.
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