Root cultures of linum species section Syllinum as rich sources of 6-methoxypodophyllotoxin.

a Department of Pharmacognosy, Faculty of Pharmacy and Pharmaceutical Sciences Research Center, Shiraz University of Medical Sciences and Health Services, P. O. Box 71345-1583, Shiraz, I. R. Iran. Fax: +98-711-2426070. E-mail: Mohaghegh@sums.ac.ir b Institut fur Entwicklungsund Molekularbiologie der Pflanzen, Heinrich-HeineUniversitat Dusseldorf, Universitatsstr. 1, D-40225 Dusseldorf, Germany c Department of Pharmacognosy, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, I. R. Iran d Institut fur Pharmazeutische Biologie und Phytochemie, Westfalische Wilhelms-Universitat Munster, Hittorfstrase 56, D-48149 Munster, Germany