Abstract
Indoor microgreen production systems are becoming increasingly popular because they can achieve high yields and quality, especially in unfavorable climates and urban settings. Light is a critical environmental factor that influences plant development; however, limited information exists on the effects of photoperiod (PP) on the growth of chia and arugula microgreens and on the associated electricity costs. The objective of this study was to evaluate the impact of different blue LED light (Light-Emitting-Diode) PPs, 24:0, 18:6, 12:12, and 6:18 h of light:dark compared with natural light, on the growth and biomass production of Salvia hispanica (chia) and Eruca sativa (arugula) grown indoors under controlled conditions (25 °C and 189.4 μmol·m−2·s−1). In chia, shoot length increased (p ≤ 0.05) with shorter PP, particularly under the 6:18 and 12:12 h·d−1 photoperiods, while arugula showed no significant response. Root length and total plant length were unaffected by photoperiod in either species. Leaf area was the most responsive growth parameter, with larger leaves produced under PP of 18 h or more per day. Total chlorophyll content was highest at 12:12 and 18:6 h light:dark. Fresh biomass reached its maximum at 18:6, with 637.6 g m−2 in chia and 883.7 g m−2 in arugula. TOPSIS was used as a multi-criteria decision-making tool for comprehensive treatment evaluation, showing that the 6:18 treatment achieved the highest overall ranking, whereas the 18:6 treatment resulted in the greatest biomass production.
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Claims 8
Claim · model-written summary
In chia, shoot length increased with shorter photoperiods, particularly 6:18 and 12:12 h light:dark.
Not reportedComparator
Verbatim
e0“In chia, shoot length increased (p ≤ 0.05) with shorter PP, particularly under the 6:18 and 12:12 h·d−1 photoperiods”
Claim · model-written summary
Arugula showed no significant shoot length response to photoperiod.
- Taxon
- arugula
Eruca vesicaria subsp. sativae0 - Treatment
- PPe0
- Outcome
- shoot lengthe0
- Direction
- no significant responsee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In chia, shoot length increased (p ≤ 0.05) with shorter PP, particularly under the 6:18 and 12:12 h·d−1 photoperiods, while arugula showed no significant response”
Claim · model-written summary
Root length and total plant length were unaffected by photoperiod in both species.
- Taxon
- either speciese0
- Treatment
- photoperiode0
- Outcome
- Root length and total plant lengthe0
- Direction
- unaffectede0
Not reportedComparator
Verbatim
e0“Root length and total plant length were unaffected by photoperiod in either species”
Claim · model-written summary
Leaf area was the most responsive growth parameter, with larger leaves under photoperiods of 18 h or more per day.
Not reportedTaxonComparator
Verbatim
e0“Leaf area was the most responsive growth parameter, with larger leaves produced under PP of 18 h or more per day”
Claim · model-written summary
Total chlorophyll content was highest at photoperiods of 12:12 and 18:6 h light:dark.
Not reportedTaxonComparator
Verbatim
e0“Total chlorophyll content was highest at 12:12 and 18:6 h light:dark”
Claim · model-written summary
Chia fresh biomass reached its maximum at the 18:6 photoperiod, at 637.6 g m−2.
Not reportedComparator
Verbatim
e0“Fresh biomass reached its maximum at 18:6, with 637.6 g m−2 in chia”
Claim · model-written summary
Arugula fresh biomass reached its maximum at the 18:6 photoperiod, at 883.7 g m−2.
- Taxon
- arugulaEruca vesicaria subsp. sativae0
- Treatment
- 18:6e0
- Outcome
- Fresh biomasse0
- Direction
- maximume0
- Value
- 883.7 g m−2e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fresh biomass reached its maximum at 18:6, with 637.6 g m−2 in chia and 883.7 g m−2 in arugula”
Claim · model-written summary
In a TOPSIS multi-criteria evaluation, the 6:18 photoperiod treatment achieved the highest overall ranking.
Not reportedTaxonComparator
Verbatim
e0“the 6:18 treatment achieved the highest overall ranking”
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