Fig 6. Morphological structures of Phytophthora ornamentata formed on V8 Agar; a-e.

Sporangia produced in nonsterile soil extract water; a-b. Mature non-papillate, obpyriform to ovoid, persistent sporangia; c. Empty, elongated, ovoid sporangium showing both internal extended proliferation and formation of an additional basal sporangiophore; d-e. Sporangia that failed to form a basal septum and continue to grow with hyphae from the apex of the sporangia, which de facto have the status of hyphal swellings; f. Irregular catenulate hyphal swellings; g-h. Globose to subglobose hyphal swellings with radiating hyphae; i-m. Mature ornamented oogonia and antheridia with finger-like projections (arrow); i-j. Oogonia with amphigynous antheridia; k. Oogonium with paragynous antheridium; k-l. Same oogonium showing the ornamented protuberances on the surface of the oogonial wall; m. Mature bronze-brown oogonia. Scale bar = 20μm.