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
Comparative gametangial morphology of Phytophthora Clade 5 species |
P. megasperma colony morphology on PDA Colony morphology on PDA at 7 days |
Dead and healthy Port-Orford cedar seedlings Port-Orford-cedar seedlings planted to test for Phytophthora lateralis resistance at the Dorena Genetic Resource Center |
P. pinifolia hyphal growth P. pinifolia pathogen growing from infected needle on selective agar |
P. siskiyouensis bleeding canker Close-up of margin area of bole lesions under the bark of a bleeding canker |
P. lateralis on Port Orford cedar Atypical decline caused by aerial infections in Scaër, France |
P. boehmeriae sporangium Sporangium showing ovoid and ovoid to spherical shape and papillate condition |
P. pinifolia colony morphology on V8 Colony morphology of P. pinifolia at 20°C on V8 after 3 weeks. From Duran et al. 2008 |
P. cryptogea hyphal swellings Cluster of small, angular to globose hyphal swellings formed in water |
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. 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. ramorum leaf symptoms on tan oak Tip symptoms on tanoak seedling (Notholithocarpus densiflorus). |