Plant Physiol. Drug Metab Dispos
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Plant Physiology 68:731-734 (1981)
© 1981 American Society of Plant Biologists

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Articles

Localization of DNA in Mature and Young Wheat Chloroplasts Using the Fluorescent Probe 4'-6-Diamidino-2-phenylindole 1

Gun Selldén2 and Rachel M. Leech

Department of Biology, University of York, York Y01 5DD, United Kingdom

The spatial organization of chloroplast DNA in developing and dividing wheat chloroplasts was studied in the light microscope using the fluorescent probe 4'-6-diamidino-2-phenylindole, which binds specifically to DNA.

The DNA of wheat chloroplasts was localized at the periphery of the plastid, frequently in a discrete band. No relocalization of the DNA was observed during plastid replication. This peripheral location of the DNA was shown to differ from the central random location of DNA in tobacco and spinach chloroplasts.

2 Present address: University of Göteborg, Botanical Institute, Department of Plant Physiology, Carl Skottsberg gata 22, S-41319 Göteborg, Sweden.

1 This work was supported by grants to GS from the Royal Society and to RML from the Agricultural Research Council of Great Britain.






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ASPB Publications PLANT PHYSIOLOGY THE PLANT CELL
Copyright © 1981 by the American Society of Plant Biologists