The biology ofGlaucocystis nostochinearum

Abstract

A study has been made of the morphology and fine structure of young and old cells of the apoplastidic alga Glaucocystis nostochinearum Itzigsohn which contains endophytic blue-green algae. Experiments have been described which indicate that the blue-green algae form a symbiotic association with the host algae, acting as ‘chloroplasts’. The findings have been discussed in the light of recent work on this alga, particularly in relation to the vexing question of the taxonomic position of the organism.