and : Two New Oomycete Species from Rice Paddies in Iran.

An investigation into oomycete diversity in rice paddies of Fars Province in Iran led to the identification of two new () species as and The identification was based on morphological and physiological features as well as on the phylogenetic analysis of nuclear (ITS and ) and mitochondrial (1 and 2) loci using Bayesian inference and Maximum Likelihood. The present paper formally describes these two new species and defines their phylogenetic relationships with other congeneric species. According to multiple gene genealogy analysis, was grouped with other species of (formerly, clade G of ) and was closely related to both and the recently described The second species, designated , was grouped with other species of (formerly, clade B of ) and, according to the phylogenetic analysis, shared an ancestor with The production of globose hyphal swellings was a major characteristic of , which did not produce vesicles and zoospores. In pathogenicity tests on rice seedlings, isolates were highly pathogenic and caused severe root and crown rot, while isolates were not pathogenic.