Secondary Metabolites of Medicinal Plants. Bharat Singh

by different basal mediums revealed that aloe emodin accumulation is much higher on B5 medium than on MS medium (Lee et al. 2011). Aloesin, aloin, and aloe emodin are considered as the most important secondary products due to its medicinal and cosmetic properties. It was observed that aloesin production was higher in MS medium with 2,4-D and BA supplementation, while total aloin concentration was higher in calli induced by leaves. Aloe emodin production was greater than aloin production in the calli of both basal and fresh leaves compared to the entire leaves. Probably, this high aloe emodin production found was due to the aloin oxidation (Acurero 2008).

Light is considered as important component for induction of calli in A. barbadensis. The maximum calli were induced under the dark condition on MS medium supplemented with NAA, as compared to light. Biotransformation ability of A. barbadensis cell suspension culture was studied by incubation with (+)-adrenosterone, which afforded three products: Δ1-2-dehydroadrenosterone, 5α-androst-1-ene-3,11,17-trione, and 17β-hydroxyandrost-4-ene-3, 11-dione (Badar et al. 2013).

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