@ARTICLE{TreeBASE2Ref26519, author = {Tatiane Albuquerque Alves and Dauri J. Tessmann and Kelly L. Ivors and Jean B Ristaino and Alvaro F Santos}, title = {Phytophthora acaciae sp. nov., a new species causing gummosis of black wattle in Brazil}, year = {2019}, keywords = {forest fungi, Oomycetes, phylogenetics, Straminipila, taxonomy, 1 new taxon }, doi = {}, url = {http://}, pmid = {}, journal = {Mycologia}, volume = {}, number = {}, pages = {}, abstract = {A new Phytophthora species was found associated with gummosis in black wattle plantations in the subtropical, humid, south of Brazil. The new species Phytophthora acaciae is formally named herein based on phylogenetic and morphological analysis. This is the fourth Phytophthora species found from this pathogen complex in black wattle plantations causing gummosis in Brazil. The other three species are P. nicotianae, P. boehmeriae, and P. frigida. Phytophthora acaciae is heterothallic with amphigynous antheridia, non-caducous, papillate sporangia, and is placed in the Phytophthora clade 2 based on internal transcribed spacers (ITS1-5.8S-ITS2 = ITS) sequences. Maximum parsimony phylogenetic analyses of P. acaciae isolates based on multigene sequences, including partial DNA sequences of three nuclear protein-coding genes (β-tubulin, translation elongation factor-1α, and ras-related protein), two mitochondrial protein-coding genes (cytochrome c oxidase subunits I and II), in addition to ITS sequence data, support the delimitation of this new species on Acacia mearnsii from the other previously described clade 2 Phytophthora species. Pathogenicity trial confirmed that the new species causes necrotic lesions on the plant stem, with either the presence or absence of gum. } }

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