Fig. 2

Transmission electron micrographs of life stages representative of Aphelidiaceae. a Motile zoospore with filose pseudopodia (FPs) and containing a nucleus (N), multiple mitochondria (M), and dispersed ribosomes (R). b Motile zoospore with a pseudopodium (Ps), multiple lipid globules (L) and an adjacent microbody (Mb), and a kinetosome (K). c Motile zoospore with a posterior flagellum (F) and central vacuole (Vac). d Amoeboid zoospore (P) approaching a host cell. e Encysted zoospore (C) containing an anterior vacuole (Vac) and a nucleus, attached to host via an appressorium (Ap). f An infected host cell, with a zoospore cyst attached and the parasitoid plasmodium (PP) inside the host. Figs. A, B, D, E, F =Am. occidentale (FD 01); Fig. C = Aph. desmodesmi strain FD 104. Bars: A–E = 5 μm, F = 2 μm