AN ELECTRON-MICROSCOPIC STUDY ON TETRASPOROGENESIS OF THE PARASITIC RED ALGA ERYTHROCYSTIS-MONTAGNEI (DERB AND SOL) SILVA

  • 1 January 1981
    • journal article
    • research article
    • Vol. 31  (123-) , 163-178
Abstract
An ultrastructural study was performed on the cells involved in the formation and ripening of tetraspores in the red alga E. montagnei. This organism is considered a parasitic species, although relationships with the host plant [Laurencia] are not completely known. A series of morphological changes occur in dictyosomes, which assume different dispositions of cisternae and produce different kinds of vesicles in the various stages of tetrasporogenesis. Plastids reach their complete differentiation when the cleavage furrows are nearly complete. Their complexity is comparable to that visible in autotrophic red algae. During tetrasporogenesis the cytological changes are less profound than those which take place in the course of carposporogenesis.