Fig. 6

Phytophthora castanetorum. A. papillate limoniform sporangium formed in solid V8 agar (V8A) (CBS 142299 — ex-type). B–J. Sporangia formed on V8A flooded with soil extract. B–G. With vacuole. B. Ovoid, papillate with external proliferation close to sporangial base and hyphal extension (arrow) (BD 484). C. Ovoid, papillate with limoniform swelling before sporangial base (CBS 142299). D. Ovoid, papillate with laterally attached sporangiophore (BD 484). E. Obpyriform, papillate with short hyphal extension (arrow) (CBS 142299). F. Limoniform, papillate with elongated base and conspicuous basal plug (BD 486). G. Globose, papillate with laterally attached sporangiophore (BD 484). H. Ovoid, semipapillate on short lateral hypha (BD 476). I. ovoid, nonpapillate intercalary (BD 336). J. Ovoid sporangium with conspicuous basal plug, releasing zoospores (CBS 142299). K–O. Mature oogonia containing thick-walled oospores with large ooplast, formed in single culture in V8A. K–L. Globose to subglobose with aplerotic oospore and paragynous antheridium (CBS 142299). M. Globose to subglobose with aplerotic oospore and amphigynous antheridium (BD 484). N. Elongated excentric with aplerotic oospore and paragynous antheridium (BD 484). O. Elongated pyriform with paragynous antheridium, curved base and plerotic elongated oospore with two ooplasts (CBS 142299). P–R. Hyphal swellings formed on V8A flooded with soil extract (CBS 142299). P. Peanut-shaped intercalary. Q. Pyriform, terminal with radiating hyphal extensions. R. Globose, terminal with short hyphal extension. S–T. Sympodially branching primary hyphae in solid V8A with the mother hypha ending in a short protruding tip (CBS 142299). Bar A–T = 25 µm.