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OBSERVATIONS ON THE FINE STRUCTURE OF THE CRYPTOPHYCEAE. I. THE GENUS CRYPTOMONAS 1, 2
Author(s) -
Lucas I. A. N.
Publication year - 1970
Publication title -
journal of phycology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.85
H-Index - 127
eISSN - 1529-8817
pISSN - 0022-3646
DOI - 10.1111/j.1529-8817.1970.tb02353.x
Subject(s) - pyrenoid , biology , golgi apparatus , endoplasmic reticulum , plastid , botany , chloroplast , microbiology and biotechnology , biochemistry , gene
SUMMARY The fine structure of 3 members of the genus Cryptomonas, C. rostrella, C. reticulata , and C. calceiformis , has been examined. These species exhibit the features typical of the class Cryptophyceae. The presence of subpellicular trichocysts causes a regular folding of the periplast, and larger trichocysts are present within the gullet. The plastid contains thylacoids arranged in pairs and a prominent pyrenoid; both structures are enclosed in 4 membranes, the outermost of which is a rough endoplasmic reticulum. The nucleus, Golgi apparatus and the Corps de Maupas occupy characteristic positions within the cell, and are the most characteristic features. All these structures indicate that this algal class occupies a unique phylogenetic position.