title: Succinate dehydrogenase in Arabidopsis thaliana is regulated by light via phytochrome A.
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.
authors.affiliation: Department of Biochemistry and Cell Physiology, Voronezh State University, Voronezh, Russia. pvn@bio.vsu.ru
authors.forename: Vasily N
authors.initials: VN
authors.lastname: Popov
authors.forename: Alexander T
authors.initials: AT
authors.lastname: Eprintsev
authors.forename: Dmitry N
authors.initials: DN
authors.lastname: Fedorin
authors.forename: Abir U
authors.initials: AU
authors.lastname: Igamberdiev
mesh_terms: D017360:Arabidopsis / Q000201:enzymology* / Q000235:genetics / Q000528:radiation effects; D029681:Arabidopsis Proteins / Q000096:biosynthesis* / Q000235:genetics / Q000378:metabolism*; D002384:Catalysis; D019069:Cell Respiration / Q000528:radiation effects; D015536:Down-Regulation; D015971:Gene Expression Regulation, Enzymologic / Q000528:radiation effects*; D018506:Gene Expression Regulation, Plant / Q000528:radiation effects*; D007506:Iron-Sulfur Proteins / Q000096:biosynthesis* / Q000235:genetics; D008027:Light; D051942:Phytochrome A / Q000235:genetics / Q000378:metabolism*; D013385:Succinate Dehydrogenase / Q000096:biosynthesis* / Q000235:genetics
chemical_list: D029681:Arabidopsis Proteins; D007506:Iron-Sulfur Proteins; C497973:PHYA protein, Arabidopsis; D051942:Phytochrome A; C496080:SDH2-3 protein, Arabidopsis; D013385:Succinate Dehydrogenase