Conclusions
Data from 101 naturalized stands ofCannabis in east-central Illinois indicate that production of Δ1(6)-THC, Δ1-THC, cannabinol and cannabidiol was determined, to a large extent, by environmental conditions of the site where plants are grown. It is assumed that these stands represented a relatively homogeneous genetic population. Δ1-THC was under the strongest environmental control. In general, content of these compounds was higher in marihuana from stands where plants were stressed. Two types of stress were suggested by the data: nutrient deficiency and inadequate moisture. Competition from other plants enhanced the content of the drug compounds, and this relationship strengthens the stress hypothesis. Work is underway to confirm this relationship.
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Chemical analyses of marihuana samples were provided by the National Institute of Mental Health
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Haney, A., Kutscheid, B.B. Quantitative variation in the chemical constituents of marihuana from stands of naturalizedCannabis sativa L. in East-Central Illinois. Econ Bot 27, 193–203 (1973). https://doi.org/10.1007/BF02872989
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DOI: https://doi.org/10.1007/BF02872989