Influence of Green Light Added with Red and Blue LEDs on the Growth, Leaf Microstructure and Quality of Spinach (Spinacia oleracea L.)

The aim of this study was to investigate the effects of green light, added with red and blue LEDs, on the growth, leaf microstructure and quality of spinach plants. Plants were transplanted and grown hydroponically for 30 days under different combinations of red:blue with a 4:1 ratio (R4B1), red:blu...

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Published in:Agronomy (Basel) 2021-09, Vol.11 (9), p.1724
Main Authors: Nguyen, Thi-Phuong-Dung, Jang, Dong-Cheol, Tran, Thi-Thanh-Huyen, Nguyen, Quang-Thach, Kim, Il-Seop, Hoang, Thi-Lan-Huong, Vu, Ngoc-Thang
Format: Article
Language:English
Subjects:
Carotenoids
Chlorophyll
Ethanol
Experiments
Flux density
growth
Hydroponics
leaf microstructure
Leaves
Light effects
Light emitting diodes
light quality
Microstructure
Organic acids
Photosynthesis
Photosynthetic pigments
Pigments
Plant growth
Plants
quality
Seeds
Spinach
Spinacia oleracea
Variance analysis
Vegetables
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Summary:The aim of this study was to investigate the effects of green light, added with red and blue LEDs, on the growth, leaf microstructure and quality of spinach plants. Plants were transplanted and grown hydroponically for 30 days under different combinations of red:blue with a 4:1 ratio (R4B1), red:blue:green with a 5:2:3 ratio (R5B2G3) and red:blue:green with a 1:1:1 ratio (R1B1G1), at a 190 µmoL m−2·s−1 photosynthetic photon flux density (PPFD). The results showed that green light, added to red and blue LEDs at a reasonable ratio, could reduce the growth, leaf microstructure and quality of spinach plants, but not the organic acid content. The highest values for the growth parameters, photosynthetic pigments, leaf structure characteristics and quality of the spinach plant were observed for the R4B1 treatment, but not for the organic acid content. Therefore, our results suggest that green light added to red and blue LEDs at a reasonable ratio is not suitable for the growth of spinach.
ISSN:2073-4395
2073-4395
DOI:10.3390/agronomy11091724