Fig. 4
![Fig. 4](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs13068-015-0295-y/MediaObjects/13068_2015_295_Fig4_HTML.gif)
Cluster analyses of key genes from central and oxidative stress response metabolism pathways. Differentially expressed genes were clustered by log2-based expression values; the rows indicate different genes and the columns indicate two comparisons. Green, black, and red indicate up-regulated, unchanged, and down-regulated genes, respectively.