“…Correspondence: Dr. Javier Palazon (javierpalazon@ub.edu), Laboratori de Fisiologia Vegetal, Facultat de Farmacia, Universitat de Barcelona, Av. Joan XXIII sn, 08028 Barcelona, Spain Abbreviations: CFW, cell fresh weight; CORO, coronatine; GI, growth index; MeJA, methyl jasmonate; MER, Manila elemi resin; SA, salicylic acid; YE, yeast extract Thus, plant cell factories have emerged as a realistic technology for the production of bioactive components of medicines and cosmetics, including high added value products such as shikonin, arbutine, and taxol [2]. In recent years, a number of cosmetic companies have also begun to use plant cell cultures, referred to as "plant stem cells," directly as cosmetic ingredients, thus expanding the role of this technology.…”