Articles
Effects of red-blue ratio of supplemental LED lighting on plant growth and tuber yield in potato cultivars
Article number
1441_27
Pages
217 – 222
Language
English
Abstract
Light spectral composition influences plant growth and product yield in many plant species, however only a few data on plant response to light spectrum are available for potato (Solanum tuberosum L.), as it is usually cultivated in open field.
We evaluated the influence of plant genotype and light spectrum of supplemental artificial lighting on photosynthesis, plant growth and tuber yield and quality of potato, grown in pot in greenhouse.
Two plots were equipped with 30% shading nets and an automated system with red (R) and blue (B) light emitting diodes (LEDs), reintegrating the reduced sunlight intensity.
The effects of two LED treatments, at the ratios RB1:1 and RB2:1, compared to sunlight (CNT), were evaluated in two cultivars, ‘Colomba’ and ‘Libra’, in terms of plant growth, leaf photosynthesis and tuber yield.
In CNT plants, net photosynthesis (NP) was similar in the cultivars, while aerial biomass accumulation and tuber yield were greater in ‘Libra’. In ‘Colomba’, NP and plant leaf area were unaffected by lighting treatments, however, the tuber yield increased under RB 2:1 light integration.
Conversely, in ‘Libra’ both the aerial biomass and the tuber production decreased with RB 2:1 light.
The dry matter partitioning revealed a higher harvest index in ‘Colomba’, and similar values within each cultivar in all the lighting conditions.
Potato tubers of ‘Colomba’ showed higher content of all the nutrients, except P and Cu, than ‘Libra’. Supplemental RB light did not alter the mineral composition of tubers compared to sunlight.
Our results showed a genotype-specific response to light quality in potato, highlighting the need of preliminary characterization of cultivar sensitivity to light spectrum to develop efficient protocols for artificial lighting.
We evaluated the influence of plant genotype and light spectrum of supplemental artificial lighting on photosynthesis, plant growth and tuber yield and quality of potato, grown in pot in greenhouse.
Two plots were equipped with 30% shading nets and an automated system with red (R) and blue (B) light emitting diodes (LEDs), reintegrating the reduced sunlight intensity.
The effects of two LED treatments, at the ratios RB1:1 and RB2:1, compared to sunlight (CNT), were evaluated in two cultivars, ‘Colomba’ and ‘Libra’, in terms of plant growth, leaf photosynthesis and tuber yield.
In CNT plants, net photosynthesis (NP) was similar in the cultivars, while aerial biomass accumulation and tuber yield were greater in ‘Libra’. In ‘Colomba’, NP and plant leaf area were unaffected by lighting treatments, however, the tuber yield increased under RB 2:1 light integration.
Conversely, in ‘Libra’ both the aerial biomass and the tuber production decreased with RB 2:1 light.
The dry matter partitioning revealed a higher harvest index in ‘Colomba’, and similar values within each cultivar in all the lighting conditions.
Potato tubers of ‘Colomba’ showed higher content of all the nutrients, except P and Cu, than ‘Libra’. Supplemental RB light did not alter the mineral composition of tubers compared to sunlight.
Our results showed a genotype-specific response to light quality in potato, highlighting the need of preliminary characterization of cultivar sensitivity to light spectrum to develop efficient protocols for artificial lighting.
Publication
Authors
R. Paradiso, A. Pannico, N. Arouna, A.G. Caporale, S. De Pascale
Keywords
Solanum tuberosum L., greenhouse, light spectrum
Groups involved
- Division Landscape and Urban Horticulture
- Division Greenhouse and Indoor Production Horticulture
- Division Precision Horticulture and Engineering
- Division Plant-Environment Interactions in Field Systems
- Division Horticulture for Human Health
- Division Vegetables, Roots and Tubers
- Working Group Vertical Farming
- Working Group Urban Horticulture
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