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LM micrographs showing the results of the histochemical investigation on the glandular trichomes in the investigated C. sativa varieties. (a,b) Capitate-stalked trichome: Nadi reagent (a), Ferric Tricloride (b); (c,d) capitate-sessile trichome: Nadi reagent; (e,f) bulbous trichome: Nadi reagent (e), Ferric Tricloride (f). Scale bars = 20 µm.
