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Plant Physiology 73:228-232 (1983)
© 1983 American Society of Plant Biologists

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Articles

Shikimate Pathway Activity during Shoot Initiation in Tobacco Callus Cultures 1

Lynda D. Beaudoin-Eagan and Trevor A. Thorpe

Plant Physiology Research Group, Department of Biology, University of Calgary, Calgary, Alberta T2N 1N4 Canada

The activity of the shikimic acid pathway during shoot initiation in tobacco (Nicotiana tabacum L. Wisconsin 38) callus was examined. Enhancement of the activities of 3-deoxy-D-arabino-heptulosonic acid 7-phosphate synthase, shikimate kinase, chorismate mutase, and anthranilate synthase was observed during culture of tobacco callus under shootforming conditions in comparison to tissue cultured under non-organforming conditions. Confirmation of these findings was obtained by examining the incorporation of D-[14C]glucose into quinic and shikimic acids and of [14C]shikimic acid into tyrosine, phenylalanine, and tryptophan.

1 Supported by Natural Sciences and Engineering Research Council of Canada Grant A6467 to T. A. T.






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Copyright © 1983 by the American Society of Plant Biologists