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Plant Physiology 62:558-562 (1978)
© 1978 American Society of Plant Biologists

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Variation in Plastid Number

Effect on Chloroplast and Nuclear Deoxyribonucleic Acid Complement in the Unicellular Alga Olisthodiscus luteus 1

Rose Ann Cattolico

Botany Department AK-10, University of Washington, Seattle, Washington 98195

Changes in the physiological state of the multiplastidic alga Olisthodiscus luteus result in a shift in chloroplast complement from 33 to 21 plastids. The effect of this induced change in organelle complement on nuclear and chloroplast DNA levels has been analyzed. Data suggest that the absolute amount of chloroplast and nuclear DNA found within a cell remains constant but that the amount of chloroplast DNA per plastid is inversely proportional to the number of chloroplasts to which that DNA must be distributed.

1 Supported by the University of Washington Graduate Research Fund and National Science Foundation Grant PCM 76-24440.






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Copyright © 1978 by the American Society of Plant Biologists