Plant Physiol. Journal of Pharmacology and Experimental Therapeutics
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Plant Physiology 67:820-824 (1981)
© 1981 American Society of Plant Biologists

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Articles

Relationship of Camphor Biosynthesis to Leaf Development in Sage (Salvia officinalis) 1,2

Rodney Croteau3, Mark Felton, Frank Karp and Robert Kjonaas

Institute of Biological Chemistry and Biochemistry/Biophysics Program, Washington State University, Pullman, Washington 99164

The camphor content of sage (Salvia officinalis L.) leaves increases as the leaves expand, and the increase is roughly proportional to the number of filled peltate oil glands which appear on the leaf surface during the expansion process. 14CO2 is more rapidly incorporated into camphor and its direct progenitors in expanding leaves than in mature leaves, and direct in vitro measurement of the key enzymes involved in the conversion of geranyl pyrophosphate to camphor indicates that these enzymes, including the probable rate-limiting cyclization step, are at the highest levels during the period of maximum leaf expansion. These results clearly demonstrate that immature sage leaves synthesize and accumulate camphor most rapidly.

3 To whom inquiries should be addressed.

1 This work was supported in part by National Foundation Grant PCM 78-19417. This is Scientific Paper 5648, Project 0268, College of Agriculture Research Center, Washington State University, Pullman, WA 99164.

2 Dedicated to the memory of our colleague Noe Higinbotham.




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Copyright © 1981 by the American Society of Plant Biologists