Cell Biology of Chromerids: Autotrophic Relatives to Apicomplexan Parasites - International Review of Cell and Molecular Biology - page 336

Figure 8.4 Ultrastructure of the asexual cell division of C. velia. The longitudinally sec-
tioned plastids are filled with thylakoids arranged in stacks of three. The autospores also
contain an oval nucleus with nucleoli, as well as numerous granules likely with amylo-
pectin and lipid contents (scale bar¼2 m m).

Figure 8.5 Detailed view of an autosporangium of C. velia. Ruptured wall reveals the
presence of four tightly bound autospores (scale bar

¼ 1 m).

m

Along with the nonmotile cells, elongated zoospores possessing two
prominent flagella ( Fig. 8.8 ) and retaining a relatively large and evenly
pigmented plastid ( Fig. 8.9 ) were observed to move very fast in a character-
istic zig-zag manner ( Oborn´k et al., 2011; Weatherby et al., 2011 ). Zoo-
spores of chromerids highly resemble colpodellids in morphology, overall
cell shape, and the presence of two heterodynamic flagella, both thinly
tapered at their terminus ( Leander et al., 2003 ). The motile stages display