Plants are the source of various photochemicals; metabolites are used in medicinal and environmental sectors as well as being widely used in commercial and pharmaceutical products. Although they produce a number of medicinal products, either already on the market or under trial, the amounts obtained from plant sources are very minute or difficult to synthesize at an industrial level due to the complex chemical composition and chirality exhibited by these compounds. However, plant cell cultures offer a good alternative for the consistent production of desired secondary metabolites under the influence of precursors and elicitors. In this review, we discuss the various aspects of secondary metabolites, production synthesis, and sources of medical products from plant sources.

Plant tissue culture has developed widely incorporated into biotechnology, the agricultural systems being a key factor to support many pharmaceutical and industrial outcomes. Since 1902 there is vast progress in plant culture and its application has emerged having great diversity in the science filed.  Due to development and desire to grow on high scale production in the past few decades, tissue culture techniques were manipulated for improvement of plant growth, biological activities, transformation, and secondary metabolites production. A significant advance in techniques has been sought to deal with problems of low concentrations of secondary metabolites in whole plants. The augmented use of plant culture is due to a superior perceptive of plant oriented compounds and secondary metabolites from economically important plants. Due to development in modern techniques, several particular protocols have been developed for the production of a wide array of secondary metabolites of plants on a commercial scale. Plant tissue culture has to lead to significant contributions in recent times and today they constitute an indispensable tool in the advancement of agricultural sciences and modern agriculture. This review would enable us to have an analysis of plant tissue culture development for agriculture, human health and wellbeing in general.

Highlights Naturally, secondary metabolites scopolamine and hyoscyamine exhibited a lesser yield from leaf extract or callus induced from stems. Supplementation of saccharides (sorbitol and mannitol) callus induct media increase significant amount secondary metabolites in stem derived calli of Datura inoxia. The secondary metabolite hyoscyamine from Datura inoxia exhibited potent antimicrobial properties.

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The present study indicate the possibility of the development of callus from stem cut, leaf and root explants and regeneration of Datura plant (Datura innoxia) on Murashige and Skoog (MS) media supplemented with different concentrations of 6-Benzylaminopurine (BA) and 1-Naphthaleneacetic (NAA). Sterilized explants were inoculated and incubated in culture shade under different conditions (light and dark). Data analysis showed that maximum percentage (83%) of calli were induced from stem cut explants on MS media supplemented with NAA and BA at 0.5 and 1.0 mg/l respectively under dark condition. Maximum fresh and dry weight was found 395.63 mg and 35.64 mg respectively with supplementation of 0.5 mg/l NAA and 1 mg/l BA. Stem cut derived calli were transfer to MS regeneration medium supplementing different concentrations of plant regulators (PGRs) under different conditions. Maximum regeneration (78%) was found on MS media supplementing 1 mg/l of BA and 1 mg/l off NAA under dark condition. The attempt for callus induction from the explants (stem, leaf, root) using MS media with supplementation of different combinations of 2, 4-Dichlorophenoxyacetic acid (2, 4-D), BA and NAA, Kinetin (kin) under both light and dark conditions were carried out but no significant results were found.