Phytophthora has been rebuilt to fix security-related problems and to restore GIS tools. These tools allow users to visualize the geospatial, temporal, and environmental contexts of Phytophthora discoveries. The next phase is to update species information and add data derived from large-scale surveys. If you have suggestions and requests to make the database better, please contact Seogchan Kang (sxk55@psu.edu).
Genus wide phylogeny for Phytophthora using four mitochondrial loci (cox2, nad9, rps10 and secY; 2,373 nucleotides). Maximum likelihood branch lengths shown. Numbers on nodes represent bootstrap support values for maximum likelihood (top), maximum parsimony (middle) and Bayesian posterior probabilities as percentages (bottom). Nodes receiving significant support (>95%) in all analysis are marked with an asterisk (*). Scale bar indicates number of substitutions per site.(Martin, Blair and Coffey, unpublished).
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Phytophthora frigida Maseko, T.A. Cout. & M.J. Wingf. 2007 (Oomycetes, Pythiales)
Distribution: Africa (South Africa).
Substrate: Plant material, soil.
Disease Note: Eucalyptus collar and root rot.
Host: Acacia decurrens (Fabaceae), Eucalyptus smithii (Myrtaceae).
Supporting Literature:
Maseko, B., Burgess, T. I. , Coutinho, T.A., and Wingfeld, M.J. 2007. Two new Phytophthora species from South African Eucalyptus plantations. Mycol. Res. 111: 1321-1338.
Updated on Mar 10, 2008
Phytophthora frigida Maseko, Coutinho & M.J Wingf., sp. nov.
MycoBank no.: MB511178
Etym.: ‘frigida’ refers to the fact that this species is cold tolerant.
Phytophthora frigida sp. nov. crescit stellater vel rosaceiter in mediis plurimis, et potest in frigidis crescere (ita nomen), heterothalla, sporangiis ovoideo-obpyriformibus papillatis. Inter Phytophthoris aeriis typica est, sporangiis caducis et chlamydosporis permultis.
Typus: Republic of South Africa: Natal Province: Sutton plantation, Ixopo, Eucalyptus smithii, Feb. 2001, B.O.Z Maseko, (PREM 59222 — holotypus. dried culture with asexual structures on CMA with a corresponding microscope slide; ex-type culture CMW20311; paratypes PREM, (59218, 59218, 59220, 59221), dried cultures with asexual structures on CMA with matching microscope slides; ex-paratype cultures CMW 19426 CMW 19428, CMW 19433, CMW 19435.)
Primary hyphae coralloid, irregular, and sympodially branched, fairly uniform in width measuring up to 5 μm, (3.5–) 4–5 μm (mean 4.5 μm). Hyphal swellings globose and intercalary. Chlamydospores terminal, globose, (20–) 24–26 (–35) diam, (mean 25 μm), thin or thick-walled and brown. Sporangiophores thin branches, arising near or directly from hyphal swellings. Sporangia terminal or sometimes intercalary, readily produced in solid or liquid media, conspicuously papillate, exit pore (3–) 5–6 (7–) μm, (mean 5 μm), ovoid, obpyriform or irregular shaped, (l × b) (24–) 31–34 (–40) × (20–) 26–28 (–33) (mean 33 × 27 μm), caducous with short pedicels. Oogonia produced only in dual cultures, terminal, spherical with smooth walls, often thicker and golden brown with age and mostly (25–) 31–34 (−42) (mean 33 μm) diam. Oospores aplerotic (19–) 26–30 (−38) μm diam (mean 28 μm), wall 1.5–2 (−3) μm thick, often light yellow or colourless. Antheridia amphigynous (95 %), elongated, cylindrical or spherical to ellipsoidal.
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