1. Ayabe S, Udagawa K, Iida Y, Yohsikawa T (1987) Regulation of retrochalcone biosynthesis: activity changes of O-methyltransferase in the yeast extract-induced Glycorrhiza echinata cells. Plant Cell Reports 6:16–19
2. Bailey JA and Mansfield JW (1982) (eds) Phytoalexins, Blackie, Glasgow, London
3. Barz W and Koster J (1981) Turnover and degradation of secondary (natural) products. In: Conn EE (ed) The biochemistry of plants, Vol. 3, Academic Press, New York, London, Toronto, Sydney, San Francisco, pp 35–84
4. Barz W, Reinhard E and Zenk W (1987) (eds) Plant tissue culture and its biotechnological application, Springer Verlag, Berlin, Heidelberg and New York
5. Barz W and Ellis BE (1981) Plant cell cultures and their biotechnological potential. Ber. Deutsch. Bot. Ges. 94:1–26