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ASPECTS ULTRASTRUCTURAUX PARTICULIERS AU PLASTE DU BATRACHOSPERMUM VIRGATUM (SIRDT)—RHODOPHYCÉE—NEMALIONALE 1
Author(s) -
Lichtlé Christiane,
Giraud Georges
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.tb02394.x
Subject(s) - biology , lamella (surface anatomy) , thylakoid , chloroplast , biophysics , phycobiliprotein , anatomy , phycobilisome , botany , biochemistry , paleontology , gene , cyanobacteria , bacteria
SUMMARY Phycobiliprotein aggregates, found at the outer surfaces of the chloroplast lamellae of Batrachospermum virgatum , do not look like isolated globular granules, or thin discs, as reported in different algae by other authors. The aggregates appear as long cylinders of constant thickness, perhaps composed of subunits which are not distinguishable. On a single lamella (or thylakoid) the cylinders are always parallel to one another and this parallelism may persist through several successive lamellae. However, this pattern may change according to variations in the orientation of the lamellae; in tangential and oblique sections, the phycobiliprotein cylinders frequently take the shape of chevrons. In addition, arrays of tubular structures bearing phycobilin aggregates at their outer surfaces are also seen. These “tubes” probably originate from dilated short or fragmented thylakoids.