Abstract
The inter- and intravariability of various populations of Glaucium flavum in Israel were investigated. The populations examined exhibit large variations in salt resistance as well as in alkaloid composition and content, and thus seem to constitute separate chemoecotypes. Effects of salinity on alkaloid content were equivocal: in some populations salinity reduced the alkaloid content, whereas in others it had no effect. One population of G. flavum contained no detectable amounts of glaucine, another had an average glaucine content of over 3.6%. The high alkaloid content makes such plants economically attractive for selection of high-yielding genotypes for glaucine and/or for isocorydine production.
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