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Intraspecific variation in the structural organization and redundancy of chloroplast ribosomal DNA cistrons in Euglena gracilis |
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| Authors: | Edwin A Wurtz Dennis E Buetow |
| Institution: | (1) Department of Physiology and Biophysics, University of Illinois, 61801 Urbana, Illinois, USA;(2) Present address: Laboratory of Radiation Ecology, Fisheries Center, WH-10, University of Washington, 98105 Seattle, Washington, USA |
| Abstract: | Summary Chloroplast DNAs from six different laboratory collections of Euglena gracilis  strain Z and var. bacillaris were analyzed with restriction endonucleases EcoRI and Bam HI. The most variable portion of the organelle genome is the region containing the ribosomal cistrons. Intraspecific differences occur in both ribosomal DNA cistron number (one or three) and structural organization among those strains designated as strain Z and bacillaris. One culture previously designated as Z is most likely bacillaris. |
| Keywords: | Chloroplast rDNA cistrons Intraspecific variation Euglena gracilis |
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