Abstract
In rice plants grown under red light supplemented with blue light (red/blue-light PPFD ratio was 4/1), photosynthetic rates per unit leaf area measured under white light at 1,600 and 250 micromol m-2) s-1 were higher than those in the plants grown under red light alone. The higher photosynthetic rates were associated with higher total N content of leaves, which was accompanied by larger amounts of key components of photosynthesis-limiting processes, including Rubisco, Cyt f, Chl and LHCII. These results suggested that the increase in total N content of leaves induced by supplemental blue light enhanced both light-saturated and light-limited photosynthesis.
Publication types
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Research Support, Non-U.S. Gov't
MeSH terms
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Chlorophyll / metabolism
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Cytochromes f / metabolism
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Light*
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Nitrogen / metabolism
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Nitrogen Fixation / physiology
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Nitrogen Fixation / radiation effects
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Oryza / growth & development*
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Oryza / metabolism
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Oryza / radiation effects*
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Photic Stimulation
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Photosynthesis / physiology
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Photosynthesis / radiation effects*
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Plant Leaves / growth & development*
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Plant Leaves / metabolism
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Plant Leaves / radiation effects*
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Ribulose-Bisphosphate Carboxylase / metabolism
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Up-Regulation / physiology
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Up-Regulation / radiation effects
Substances
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Chlorophyll
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Cytochromes f
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Ribulose-Bisphosphate Carboxylase
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Nitrogen