The Aureochrome Photoreceptor PtAUREO1a Is a Highly Effective Blue Light Switch in Diatoms
Marcus Mann, Manuel Serif, Thomas J. Wrobel, Marion Eisenhut, Shvaita Madhuri, Samantha Flachbart, Andreas P.M. Weber, Bernard Lepetit, Christian Wilhelm, Peter G. Kroth
Abstract
wild-type cells after a shift from red to blue light. About 75% of the genes show significantly changed transcript levels already after 10 and 60 min of blue light exposure, which includes genes of major transcription factors as well as other photoreceptors. Very surprisingly, this light-induced regulation of gene expression is almost completely inhibited in independent PtAureo1a knockout lines. Such a massive and fast transcriptional change depending on one single photoreceptor is so far unprecedented. We conclude that PtAUREO1a plays a key role in diatoms upon blue light exposure.