Next Article in Journal
Two-Species Forests at the Treeline of Siberian Mountains: An Ecophysiological Perspective under Climate Change
Next Article in Special Issue
Effect of Different Ratios of Blue and Red LED Light on Brassicaceae Microgreens under a Controlled Environment
Previous Article in Journal
Somatic Embryogenesis and Plant Regeneration in Viola canescens Wall. Ex. Roxb.: An Endangered Himalayan Herb
Previous Article in Special Issue
Regulation of the Photon Spectrum on Growth and Nutritional Attributes of Baby-Leaf Lettuce at Harvest and during Postharvest Storage
Article

Effect of Multispectral Pulsed Light-Emitting Diodes on the Growth, Photosynthetic and Antioxidant Response of Baby Leaf Lettuce (Lactuca sativa L.)

1
Lithuanian Research Centre for Agriculture and Forestry, Institute of Horticulture, Kaunas str. 30, LT-54333 Babtai, Lithuania
2
Rensselaer Polytechnic Institute, 110 8th Street, Troy, NY 12180, USA
*
Author to whom correspondence should be addressed.
Academic Editor: Szilvia Z. Toth
Plants 2021, 10(4), 762; https://doi.org/10.3390/plants10040762
Received: 16 March 2021 / Revised: 1 April 2021 / Accepted: 9 April 2021 / Published: 13 April 2021
The effect of multicolor pulsed light-emitting diode (LED) irradiation on lettuce “Defender” growth, photosynthetic performance and antioxidant properties was studied. The experiments were designed to compare the continuous and pulsed lighting (0.5, 1 kHz; 50% duty ratio) effects of B450, G520, R660 and FR735 lighting components, maintaining total diurnal integral light quantity (DLI 14.4 mol m−2 day−1) constant during the 16-h photoperiod. The results showed that lettuce grown under pulsed irradiation displayed superior growth performance, including a significant enhancement of fresh (~32%) and dry biomass (~36%) and leaf area (~48%). Lettuce cultivated in both pulsed light treatments was characterized by the higher photosynthetic rate, chlorophyll (a,b) and carotenoid concentration. However, the total phenol and antioxidant properties in lettuce were more dependent on the specific pulsed light frequency. Only treatment with 1 kHz frequency was effective for higher phenol content, 2,20-azino-bis (3-ethylbenzothiazoline-6-sulphonic acid) (ABTS) free radical scavenging activity and Fe2+ reducing antioxidant power (FRAP). Thus, our results propose the role of pulsed LED light in improving the photosynthetic efficiency and antioxidative properties of lettuce plants cultivated indoors. In the future, pulsed lighting techniques should be included in the development of artificial lighting systems in controlled environment agriculture (CEA) to produce high-quality crops with the possibility to save electricity. View Full-Text
Keywords: LEDs; pulsed light; chlorophyll; phenols; antiradical activity LEDs; pulsed light; chlorophyll; phenols; antiradical activity
Show Figures

Figure 1

MDPI and ACS Style

Miliauskienė, J.; Karlicek, R.F., Jr; Kolmos, E. Effect of Multispectral Pulsed Light-Emitting Diodes on the Growth, Photosynthetic and Antioxidant Response of Baby Leaf Lettuce (Lactuca sativa L.). Plants 2021, 10, 762. https://doi.org/10.3390/plants10040762

AMA Style

Miliauskienė J, Karlicek RF Jr, Kolmos E. Effect of Multispectral Pulsed Light-Emitting Diodes on the Growth, Photosynthetic and Antioxidant Response of Baby Leaf Lettuce (Lactuca sativa L.). Plants. 2021; 10(4):762. https://doi.org/10.3390/plants10040762

Chicago/Turabian Style

Miliauskienė, Jurga, Robert F. Karlicek Jr, and Elsebeth Kolmos. 2021. "Effect of Multispectral Pulsed Light-Emitting Diodes on the Growth, Photosynthetic and Antioxidant Response of Baby Leaf Lettuce (Lactuca sativa L.)" Plants 10, no. 4: 762. https://doi.org/10.3390/plants10040762

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop