Articles
Effect of light qualities on photosynthetic electron transport chain in chrysanthemum leaves
Article number
1271_24
Pages
169 – 176
Language
English
Abstract
Light is one of the most important environmental factors that can affect plant growth and development.
Previous studies indicated that plants under different light qualities exhibit different photosynthetic characteristics.
However, there is limited study underlying related photosynthetic electron transport under different light qualities.
To unravel the effects of light quality on photosynthetic electron transport chain, chrysanthemum (Chrysanthemum morifolium) plants were grown under four different light qualities including white (400-730 nm), blue monochromatic light (450 nm), red monochromatic light (635-665 nm) and a combination of red and blue (R:B=70:30), with the same photosynthetic photon flux density (PPFD) (250 µmol m‑2 s‑1). The results showed that using monochromatic light during growth of chrysanthemum led to some defects on electron transport chain, while using full visible spectrum (white light) or combination of red and blue lights resulted in normal performance of electron transport chain.
Between monochromatic lights, using red light significantly increased dissipated energy flux, absorption and energy trapping fluxes per reaction center when compared with other light treatments.
On the other hand, red light caused a significant decrease in the performance index for energy conservation, maximal quantum yield of primary photochemistry, quantum yield of electron transport and maximum quantum yield of photosystem II than other light treatments.
Maximal quantum yield of primary photochemistry in monochromatic lights was considerably decreased when compared to white or RB lights.
In conclusion, monochromatic lights can decrease efficiency of electron transport chain in the photosynthetic apparatus of the chrysanthemum plants.
Previous studies indicated that plants under different light qualities exhibit different photosynthetic characteristics.
However, there is limited study underlying related photosynthetic electron transport under different light qualities.
To unravel the effects of light quality on photosynthetic electron transport chain, chrysanthemum (Chrysanthemum morifolium) plants were grown under four different light qualities including white (400-730 nm), blue monochromatic light (450 nm), red monochromatic light (635-665 nm) and a combination of red and blue (R:B=70:30), with the same photosynthetic photon flux density (PPFD) (250 µmol m‑2 s‑1). The results showed that using monochromatic light during growth of chrysanthemum led to some defects on electron transport chain, while using full visible spectrum (white light) or combination of red and blue lights resulted in normal performance of electron transport chain.
Between monochromatic lights, using red light significantly increased dissipated energy flux, absorption and energy trapping fluxes per reaction center when compared with other light treatments.
On the other hand, red light caused a significant decrease in the performance index for energy conservation, maximal quantum yield of primary photochemistry, quantum yield of electron transport and maximum quantum yield of photosystem II than other light treatments.
Maximal quantum yield of primary photochemistry in monochromatic lights was considerably decreased when compared to white or RB lights.
In conclusion, monochromatic lights can decrease efficiency of electron transport chain in the photosynthetic apparatus of the chrysanthemum plants.
Authors
M. Seif, S. Aliniaeifard, M. Arab, M. Zare Mehrjerdi
Keywords
light spectrum, photosynthesis, electron transport chain, chrysanthemum
Groups involved
- Division Greenhouse and Indoor Production Horticulture
- Division Precision Horticulture and Engineering
- Division Plant-Environment Interactions in Field Systems
- Working Group Nettings in Horticulture (subgroup of Protected Cultivation in Mild Winter Climates)
- Working Group Light in Horticulture
- Working Group Organic Greenhouse Horticulture
- Working Group Modelling Plant Growth, Environmental Control, Greenhouse Environment
- Working Group Protected Cultivation, Nettings and Screens for Mild Climates
- Working Group Vegetable Grafting
- Working Group Computational Fluid Dynamics in Agriculture
- Working Group Design and Automation in Integrated Indoor Production Systems
- Working Group Mechanization, Digitization, Sensing and Robotics
- Working Group Greenhouse Environment and Climate Control
- Commission Agroecology and Organic Farming Systems
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