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
Photo Gallery
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P. agathidicida oospores  |
P. agathidicida lesion on kauri tree  Gum oozing out of longitudinal lesion |
P. agathidicia oogonia  Light micrograph of P. agathidicida oospore (Scale bar equals 15 µm) |
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Comparative gametangial morphology of Phytophthora Clade 5 species  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). |
P. agathidicia growth on V8  Colony morphology of ex-holotype ICMP 17027 after 10-days incubation at 20°C in the dark |
P. agathidicia oogonia  P. agathidicida oogonia with SEM (top) and light microscopy (bottom) |
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P. agathadicida disease symptom  Excavated lesion, with outer bark removed showing extent of disease-front |
P. agathidicia disease symptoms on kauri  Crown decline of mature kauri, with branchlets with little or no leaves |
P. agathidicida lesion on kauri tree  Close up of gum oozing out of lower trunk lesions of a young kauri tree at Maungaroa Ridge, Piha region of Waitakere Regional Park |
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P. agathidicia sporangia  Differentiation of the cytoplasm within papillate sporangia into acid fuchsin stained zoospores |
P. agathidicida sporangium  Globose to ovoid-ellipsoid, papillate sporangium |
P. agathidicida growth on MEA  Diffuse, non-patterned, colony morphology of ICMP 16471 (the original “Gadgil isolate”) after 10-days incubation at 20°C in the dark |