Journal
AGRONOMY-BASEL
Volume 11, Issue 2, Pages -Publisher
MDPI
DOI: 10.3390/agronomy11020304
Keywords
Daucus carota L.; light-emitting diode; carotenoids; individual phenolic compounds; total scavenging activity; antioxidants
Categories
Funding
- Autonomous Community of the Region of Murcia [20849/PI/18]
- Regional Programme for the Promotion of Scientific and Technical Research (Action Plan 2018) of the Seneca Foundation-Science and Technology Agency of the Region of Murcia (Spain)
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The study showed that lighting conditions improved the total antioxidant activity and increased bioactive compounds in carrot sprouts, but darkness treatment resulted in longer hypocotyl and sprout length. LEDs treatments (B+R and B+R+FR) significantly increased the phenolic compound content in sprouts.
Background: This work investigates the morphological and compositional changes of carrots sprouts during 17 days at 20 degrees C. Methods: Growing conditions were 7 days in darkness (dD) followed by 3, 7, or 10 days of a 16 h light/8 h darkness photoperiod (dP). Light stimuli used were fluorescent light (Fl), Blue+Red (B+R), Blue+Red+Far-Red (B+R+FR) Light-Emitting Diodes-LEDs- and darkness as control. Results: Results showed that lighting conditions improved the total antioxidant activity and increased the bioactive compounds compared to darkness treatment. However, hypocotyl and sprout length were increased under darkness conditions. Both LEDs treatments (B+R and B+R+FR) increased the phenolic content (phenolic acids and rutin) by 45% and 65% compared to darkness and by 32% regarding Fl. Moreover, a similar trend was observed in the carotenoids content under B+R LEDs, but not when FR was added. Conclusions: Our results suggest that LED lighting during carrot sprouting improved the synthesis of health-promoting compounds.
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