OBSERVATIONS ON FINE STRUCTURE OF CHLAMYDOBOTRYS STELLATA WITH PARTICULAR REFERENCE TO ITS UNUSUAL CHLOROPLAST STRUCTURE

Ultrastructural study of Chlamydobotrys stellata shows that whilst the basic structure is volvocalean there are certain abnormalities for a green cell. The thylakoids are predominantly separated from each other in all but the central region of the cell, where small grana are present, under the growth conditions used in these experiments. Approximately three quarters of the thylakoids are separated from each other. Reticulate areas of disorganization are also present in the central region of the chloroplast. The absence of a demonstrable Hill reaction in C. stellata may be the result of restricted grana formation. © 1969 Springer-Verlag.