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. cinnamomi hyphal swelling  P. cinnamomi hyphal swelling (or thin walled chlamydospores) |
P. cambivora colony morphology on PDA  Rosaceous colony morphology at 14 days at 20°C on PDA |
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P. arenaria sporangia  Globose papillate sporangia of Phytophthora arenaria on V8 agar flooded with soil extract. (Scale bar = 20 μm) |
P. pseudosyringae sporangium  Ovoid, semipapillate sporangia showing medium length pedicel |
P. pinifolia on Pinus radiata  Pinus radiata, note Stem canker associated with necrotic needles. |
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P. megasperma oogonium  Oogonium with paragynous antheridia applied close to the ogonial stalk. |
P. tentaculata disease symptoms on sticky monkey flower  Crown and root rot (left) on sticky monkey flower (Diplacus aurantiacus) compared with a control (right) |
P. megakarya disease symptoms on Theobroma cacao fruit  Disease symptoms on a cocoa pod |
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P. lateralis sporangia  Sporangia of P. lateralis showing internal and external proliferation |
P. agathidicida oospores  Oospores of P. agathidicida in the roots of kauri seedlings inoculated with P. agathidicida. The root has been cleared with potassium hydroxide and bleached with peroxide, before being stained with Trypan Blue |
P. palmivora sporangia
 P. palmivora caducous papillate sporangia
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