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Science 24 July 1981:
Vol. 213. no. 4506, pp. 445 - 447
DOI: 10.1126/science.213.4506.445
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Articles

Size of the Chloroplast Genome in Codium fragile

MARY F. HEDBERG 1, YUAN-SHEN HUANG 2, and MAX H. HOMMERSAND 3

1 Botany Department, University of North Carolina, Chapel Hill 27514
2 Cancer Research Center, School of Medicine, University of North Carolina
3 Botany Department, University of North Carolina

Chloroplasts isolated from the siphonous green alga Codium fragile yield circular DNA molecules averaging 27.3 micrometers in length and 56 x 106 daltons in molecular size. This chloroplast genome is 25 to 30 percent smaller than any reported. The small size of the Codium chloroplast genome may represent a primitive evolutionary condition in green plants.

Submitted on January 15, 1981
Revised on March 20, 1981

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Science. ISSN 0036-8075 (print), 1095-9203 (online)