Fig. 4: Representative transmission electron microscopy (TEM) images of Symbiodiniaceae from in situ colonies of the Pacific stony coral, Porites cf. lobata, showing progressive stages of a putative viral infection.
From: Filamentous virus-like particles are present in coral dinoflagellates across genera and ocean basins
A, B Putative early-stage viral inclusion: Symbiodiniaceae cell with whorled electron-dense viroplasm; (B) is an inset of (A); white arrowhead shows curved whorl, white arrow shows stacked parallel whorls. C, D Putative intermediate stage viral infection: filamentous VLPs in haphazard, stacked (black arrow), and stellate (black arrowhead) patterns within a Symbiodiniaceae cavity; (D) is an inset of the box in (C). E, F Putative late-stage infection: Symbiodiniaceae cell with coarse VLPs in large cavities; black arrowhead is a dense cluster of fine filamentous VLPs with visible cross sections; F is an inset of the cavity with coarse VLP (*) in (E). Putative stages follow those in [22].
