Summary The MAP kinase high osmolarity glycerol 1 (Hog1) plays a central role in responding to external oxidative stress in budding yeast Saccchromyces cerevisiae . However, the downstream responsive elements regulated by Hog1 remain poorly understood. In this study, we report that a Sporisorium scitamineum orthologue of Hog1, named as SsHog1, induced transcriptional expression of a putative cytochrome P450 oxidoreductase enco...