Expression of succinate dehydrogenase and fumarase genes in maize leaves is mediated by cryptochrome

• Published in: Journal of plant physiology 2018-02, Vol.221, p.81-84
• Main Authors: Eprintsev, Alexander T., Fedorin, Dmitry N., Cherkasskikh, Mikhail V., Igamberdiev, Abir U.
• Format: Article
• Language: English
• Subjects: Blue light; Calcium; Calcium ions; Corn; Cryptochrome; Dehydrogenase; Dehydrogenases; Enzymatic activity; Enzyme activity; Fumarase; Gene expression; Genes; Iron; Iron-sulfur proteins; Irradiation; Leaves; Mitochondria; Proteasomes; Proteins; Radiation; Succinate dehydrogenase; Sulfur; Transcription factors; Zea mays
• ISSN: 0176-1617; 1618-1328
• DOI: 10.1016/j.jplph.2017.12.004

•Blue light inhibits succinate dehydrogenase and fumarase in maize at the level of gene expression.•Blue light causes changes in the transcripts levels of Sdh1-2, Sdh2-3 and Fum1 genes.•The effect of blue light is mediated by cryptochrome via the transcription factors COP1 and HY5.•Calcium ions are not involved in cryptochrome-mediated regulation of succinate dehydrogenase and fumarase. Blue light inhibits succinate dehydrogenase and fumarase enzyme activity and gene expression in green leaves of maize (Zea mays L.). Irradiation of maize plants by blue light resulted in the transient decrease of transcripts of genes Sdh1-2 and Sdh2-3 encoding correspondingly the flavoprotein and iron-sulfur protein subunits of succinate dehydrogenase, and of Fum1 encoding the mitochondrial form of fumarase. The blue light effect was probably mediated by transcription factors COP1 and HY5, with the expression of the latter increased upon blue light treatment. This was accompanied by a decrease in the expression of COP1, presumably involved in proteasome degradation of HY5. It was also demonstrated that calcium ions do not participate in this process.