Comparative gametangial morphology of Phytophthora Clade 5 species, with SEM (top) and light microscopy (bottom). P. heveae has smooth walled oogonia with funnel-shaped, amphigynous antheridia. P. agathidicida has mildly stipulate oogonia with globose amphigynous antheridia. P.cocois has mildly bullate oogonia with reflexed amphigynous antheridia. P. castaneae has coarsely bullate oogonium with rugose protuberances and narrow amphigynous antheridia (Weir et al. 2015).
Photo Gallery
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Comparative gametangial morphology of Phytophthora Clade 5 species  |
P. katsurae disease symptoms  Infected chestnut (Castanea) with girdling canker |
P. frigida chlamydospore  Globose chlamydospores of P. frigida |
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P. tentaculata disease symptoms on California mugwort  Outplanted California mugwort (Artemisia douglasiana) infected with P. tentaculata, 4.5 years after planting. Plant shows stunting and chlorosis. (P. cryptogea and P. lacustris were also baited from roots/soil of this plant). |
P. pseudosyringae sporangium  Ovoid, semipapillate sporangia showing medium length pedicel |
Basal canker on Port-Orford cedar  Basal canker on Chamaecyparis lawsoniana |
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P. kernoviae colony morphology  From Mycol.Res 109, 853-859; growth on CA under different conditions |
P. cambivora sporangium  Ovoid non-papillate sporangia with well-rounded base and simple sporangiophore |
Austrocedrus associated with Mal del ciprés.  Austrocedrus with basal resin flow associated with Mal del ciprés. |
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P. pluvialis on Pinus radiata in New Zealand  A Pinus radiata needle showing faded olive- or khaki- coloured lesions consistent with the presence of red needle cast disease. Arrow shows resinous bands within the extended olive lesion. |
P. megasperma oogonium  Oogonium with paragynous antheridia applied close to the ogonial stalk. |
P. nicotianae sporangia  Noncaducous sporangium showing ovoid shape and papillate condition. (Fitopatol. bras. 2005) |