polaroplast

plural polaroplasts

1. An organelle, in microsporidians, that swells with water, and exerts pressure to rupture the polar cap and evert the polar tube through which the sporoplasm escapes to infect the host.

   The polaroplast consisted of a region of closely and loosely packed series of membranes (Fig 4D and 4E).

   2015 August 6, “Description of the Microsporidian Parasite, Heterosporis sutherlandae n. sp., Infecting Fish in the Great Lakes Region, USA”, in PLOS ONE, →DOI

   1 more example

   The polaroplast is a laminated structure, originating possibly by transformation of endoplasmic reticulum; the polar cap forms its apical part.

   1967 February, Jiri Lom, “Ultrastructural Observations on the Development of the Microsporidian Protozoon Plistophora hyphessobryconis Schaperclaus”, in The Journal of Protozoology, volume 14, number 1, page 141