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PLASTID MORPHOLOGY, ULTRASTRUCTURE, AND DEVELOPMENT IN COLACIUM AND THE LORICATE EUGLENOPHYTES (EUGLENOPHYCEAE)1.

Authors :
Brown, Patrick J. P.
Zakryś, Boz
Farmer, Mark A.
Source :
Journal of Phycology; Feb2003, Vol. 39 Issue 1, p115-121, 7p
Publication Year :
2003

Abstract

Chloroplast morphology was investigated in five species of euglenophytes: Trachelomonas volvocinopsis Swirenko, Strombomonas verrucosa (Daday) Deflandre, Strombomonas costata Deflandre, Colacium mucronatum Bourrelly et Chafaud, and Colacium vesiculosum Ehrenberg. All five species share a common plastid morphotype: disk-shaped plastids with a pyrenoid that protrudes asymmetrically toward the center of the cell and is capped by a single large grain of paramylon that conforms to the shape of the pyrenoid. Although plastids demonstrated some degree of diversity among the species studied, it was not consistent with current generic boundaries. The plastids of S. verrucosa show a developmental pattern similar to that of Euglena gracilis. The plastids divide during the early portion of the light phase after cell division, and pyrenoids are reduced or absent in dividing plastids. Developmental patterns of plastid replication also suggest that these five taxa share recent common ancestry with members of the genus Euglena subgenus Calliglena. [ABSTRACT FROM AUTHOR]

Subjects

Subjects :
PLASTIDS
CELL morphology
EUGLENOIDS

Details

Language :
English
ISSN :
00223646
Volume :
39
Issue :
1
Database :
Complementary Index
Journal :
Journal of Phycology
Publication Type :
Academic Journal
Accession number :
9035926
Full Text :
https://doi.org/10.1046/j.1529-8817.2003.01244.x