PT Journal AU Stoyneva, PM Ingolic, E Gartner, G Vyverman, W TI The pyrenoid ultrastructure in Oocystis lacustris. SO Fottea PY 2009 BP 149 EP 154 VL 9 IS 1 DI 10.5507/fot.2009.013 DE Oocystis lacustris; ultrastructure; pyrenoids; starch sheath AB The fine structure of vegetative cells of Oocystis lacustris has been studied with special attention to the ultrastructure of the pyrenoid and its starch sheath. The TEM-investigation showed that the pyrenoid matrix is homogenous, not traversed by thylakoids and the surrounding starch sheath is continuous, horseshoe-shaped or fragmented in 2 starch plates. This starch sheath structure is regarded as a common feature within Oocystis and closely related genera Eremosphaera and Neglectella. ER