Phytophthora infestans

Phytophthora infestans, an important plant pathogen and causative agent of the great famine in Ireland (1845), belongs to the phylum Oomycetes. Initially, Oomycetes had been classified as lower fungi, but recent molecular analysis of the nuclear srRNA gene as well as ultrastructural data clearly show that they group together with the stramenopile lineage (golden and brown algae, diatoms, etc.).


More information on Oomycetes (at Berkeley)