Oogonium with paragynous antheridia applied close to the ogonial stalk.
Photo Gallery
|
P. megasperma oogonium  |
P. pluvialis on Pinus radiata  A Pinus radiata needle showing black resinous bands or marks consistent with the presence of red needle cast disease. |
P. cactorum bleeding canker  Bleeding canker on red oak (Quercus rubra) |
|
P. megasperma sporangia  Ovoid, non-papillate sporangia showing internal proliferation of sporangiophore |
P. frigida symptoms 4  Black wattle timber with symptoms of gummosis |
P. pinifolia on Pinus radiata  Pinus radiata impacted by DFP, note healthy new growth |
|
P. ramorum sporangium  Deciduous sporangium, photo from Q-bank, used with permission |
P. austrocedrae oogonium  Oogonia with and without brown pigment, photo from Q-bank, used with permission |
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. alni canker on gray alder  Grey alder (A. incana) with collar rot caused by P. alni |
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. pinifolia colony morphology on V8  Colony morphology of P. pinifolia at 20°C on V8 after 3 weeks. From Duran et al. 2008 |