SIGMA, JURNAL SAINS DAN TEKNOLOGI, Vol. 13, No. 1 Januari 2010, ABSTRAK : An experiment to study effect of elicitor derived from sacchoromyces cerevisiae (Hansen) on ajmalicine content of catharanthus roseus (L) G. Don. calus cultures has been conducted. Callus was induced from leaf segment and grew on medium zenk (1977) supplemented with 2,5 x 10-6 M NAA dan 10-5 M BAP. Calus on the third subc…