Abstract
The effect of light on succinate dehydrogenase (SDH) activity and mRNA content was studied in Arabidopsis thaliana plants. The transition from darkness to light caused a short transient increase in the SDH activity followed by a decrease to a half of the original activity. The white or red light were found to be down-regulating factors for the mRNA content of the sdh1-2 and sdh2-3 genes and SDH catalytic activity both in A. thaliana wild-type plants and in the mutant deficient in the phytochrome B gene, but not in the mutant deficient in the phytochrome A gene, while the far-red light of 730 nm reversed the red light effect. It is concluded that phytochrome A participates in the regulation of mitochondrial respiration through effect on SDH expression.
Publication types
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Research Support, Non-U.S. Gov't
MeSH terms
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Arabidopsis / enzymology*
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Arabidopsis / genetics
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Arabidopsis / radiation effects
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Arabidopsis Proteins / biosynthesis*
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Arabidopsis Proteins / genetics
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Arabidopsis Proteins / metabolism*
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Catalysis
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Cell Respiration / radiation effects
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Down-Regulation
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Gene Expression Regulation, Enzymologic / radiation effects*
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Gene Expression Regulation, Plant / radiation effects*
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Iron-Sulfur Proteins / biosynthesis*
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Iron-Sulfur Proteins / genetics
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Light*
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Phytochrome A / genetics
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Phytochrome A / metabolism*
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Succinate Dehydrogenase / biosynthesis*
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Succinate Dehydrogenase / genetics
Substances
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Arabidopsis Proteins
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Iron-Sulfur Proteins
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PHYA protein, Arabidopsis
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Phytochrome A
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SDH2-3 protein, Arabidopsis
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Succinate Dehydrogenase