Aquaporin genes in Aureobasidium pullulans and other fungi. A. Protein tree of aquaporin-like genes from the four A. pullulans varieties and other fungi. The tree with GenBank accession numbers is available as Additional file 6. Colours correspond to previously recognised phylogenetic groups , and aquaporin-like proteins of the A. pullulans varieties are marked in red. B. Histogram showing the number of aquaporins in the four A. pullulans varieties, as compared to the other fungal species reported by Xu et al. .