Abstract
A flattened discoid flagellate collected from the Seto Inland Sea, Japan, has been examined by light and electron microscopy. This alga agrees well withClisthodiscus luteus Carter. It has two heterodynamic flagella emerging from a furrow on the upward side of the cell that contains six to 13 yellow-green parietal chloroplasts. It does not rotate but smoothly glide while swimming. The cell has a thin periplast lying between the plasmalemma and chloroplasts. Neither lipid bodies nor mucocysts are seen in the periplast. The pyrenoid matrix being free from thylakoids is penetrated by several cytoplasmic canals from various directions. There are no vesicles of periplastidal network in the narrow space between chloroplast envelope and chloroplast ER.
The ultrastructural features ofO. luteus are unique, sharing certain characters with the raphidophycean algae but others withPseudopedinella pyriformis, a unique member of the Chrysophyceae.
Similar content being viewed by others
References
Biecheler, B. 1936. Sur une chloromonadine nouvelle d'eau saumâtreChattonella subsalsa n. gen., n. sp. Arch. Zool. Exp. Gen.78: 79–83.
Bold, H.C. andM.L. Wynne. 1978. Introduction to the Algae. Structure and Reproduction. Prentice-Hall, New Jersey.
Carter, N. 1937. New or interesting algae from brackish water. Arch. Protistenk.90: 1–68, pls. 1–8.
Cattolico, R.A., J.C. Boothroyd andS.P. Gibbs. 1976. Synchronous growth and plastid replication in the naturally wall-less algaOlisthodiscus luteus. Plant Physiol.57: 497–503.
Føyn, B. 1934. Lebenzyklus, Cytologie und Sexualität der ChlorophyceeChladophora suhriana Kützing. Arch. Protistenk.83: 1–56.
Gibbs, S.P. 1962. Nuclear envelope-chloroplast relationships in algae. J. Cell Biol.14: 433–444.
—,L.L. Chu andC. Magnussen. 1980. Evidence thatOlisthodiscus luteus is a member of the Chrysophyceae. Phycologia19: 173–177.
Hada, Y. 1968. Protozoan plankton of the Inland Sea, Setonaikai II. The Mastigophora and Sarcodina. Bull. Suzugamine Women's Coll. Nat. Sci.14: 1–28.
Hara, Y. andM. Chihara. 1982. Ultrastructure and taxonomy ofChattonella (Class Raphidophyceae) in Japan. Jap. J. Phycol.30: 47–56 (in Japanese).
Hibberd, D.J. 1976. The ultrastructure and taxonomy of the Chrysophyceae and Prymnesio-phyceae (Haptophyceae): A survey with some new observations of the ultrastructure of the Chrysophyceae. Bot. J. Linn. Soc.72: 55–80.
Hulburt, E.M. 1965. Flagellates from brackish waters in vicinity of Woods Hole, Massa-chusetts. J. Phycol.1: 87–94.
Inouye, I. 1981. Notes on microalgae in Japan (1). Isolation technique. Jap. J. Phycol.29: 6 (in Japanese).
Leadbeater, B.S.C. 1969. A fine structural study ofOlisthodiscus luteus Carter. Br. phycol. J.4: 3–17.
Loeblich, III, A.R. 1975. A seawater medium for dinoflagellates and nutrition ofCachonina niei. J. Phycol.11: 80–86.
— andK.E. Fine. 1977. Marine chloromonads: More widely distributed in neritic environments than previously thought. Proc. Biol. Soc. Wash.90: 388–399.
Luft, J.H. 1961. Improvements in epoxy resin embedding methods. J. Biophys. Biochem. Cytol.9: 409–414.
Mignot, J.-P. 1967. Structure et ultrastructure de quelques Chloromonadines. Protistologica3: 5–23.
— 1976. Compléments a l'étude des Chloromonadines ultrastructure deChattonella subsalsa Biecheler flagellé d'eau saumâtre. Protistologica12: 279–293.
—,L. Joyon andE.G. Pringsheim. 1968. Compléments a l'étude cytologique des Cryptomonadines. Protistologica4: 493–506.
Moestrup, Ø. 1982. Flagellar structure in algae: A review with new observations particularly on the Chrysophyceae, Phaeophyceae (Fucophyceae), Euglenophyceae andReckertia. Phycologia21: 427–528.
Noro, T. andK. Nozawa. 1980. Ultrastructure of a red tide chloromonadophycean alga,Chattonella sp., from Kagoshima Bay, Japan. Jap. J. Phycol.29: 73–78.
Ostroff, C.R. andS.D. Van Valkenberg. 1978. The fine structure ofPseudopedinella pyriformis Carter (Chrysophyceae). Br. physiol. J.13: 35–49.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Hara, Y., Inouye, I. & Chihara, M. Morphology and ultrastructure ofOlisthodiscus luteus (Raphidophyceae) with special reference to the taxonomy. Bot Mag Tokyo 98, 251–262 (1985). https://doi.org/10.1007/BF02488775
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF02488775