Current Genetics

, Volume 15, Issue 3, pp 221–229

Chloroplast ribosomal DNA organization in the chromophytic alga Olisthodiscus luteus

  • Terrence P. Delaney
  • Rose Ann Cattolico

DOI: 10.1007/BF00435509

Cite this article as:
Delaney, T.P. & Cattolico, R.A. Curr Genet (1989) 15: 221. doi:10.1007/BF00435509


There are almost no data describing chloroplast genome organization in chromophytic (chlorophyll a/c) plants. In this study chloroplast ribosomal operon placement and gene organization has been determined for the golden-brown alga Olisthodiscus luteus. Ribosomal RNA genes are located on the chloroplast DNA inverted repeat structure. Nucleotide sequence analysis, demonstrated that in contrast to the larger spacer regions in land plants, the 16S–23S rDNA spacer of O. luteus is only 265 by in length. This spacer contains tRNAIle and tRNAAla genes which lack introns and are separated by only 3 bp. The sequences of the tRNA genes and 16S and 23S rDNA termini flanking the spacer were examined to determine homology between O. luteus, chlorophytic plant chloroplast DNA, and prokaryotes.

Key words

Chloroplast DNAChlorophyll a/c algaEvolutionRibosomal operon

Copyright information

© Springer-Verlag 1989

Authors and Affiliations

  • Terrence P. Delaney
    • 1
  • Rose Ann Cattolico
    • 1
  1. 1.Department of BotanyUniversity of WashingtonSeattleUSA