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Article history:Received 8 January 2013Accepted 17 January 2014Available online 9 May 2014Keywords:2,4-DBACell developmentLuteinMarigold Background:Thepropertiesofnaturalpigments,suchasantioxidants,functional,medical,andnutraceutical,havedemonstratedtheadvantagesofthesenaturalcompoundsoversyntheticones.Someproductsareacceptedonlywhen they are pigmented with natural, food-quality colorants: for example poultry products (manly marigoldower extracts). Carotenoids such as β-carotene, β-criptoxanthin and lutein are very attractive as natural foodcolorants due to their antioxidant and pro-vitamin activities which provide additional value to the targetproducts.Marigold (Tagetes erecta)isan Asteraceous ornamentalplantnativetoMexico,anditisalsoimportantasa carotenoid source for industrial and medicinalpurposesbut nowadays its production isdestined mainlyforornamental purposes.Results: Friable callus of T. erecta yellow ower (YF) and white ower (WF) varieties was induced from leafexplants on Murashige and Skoog (MS) medium supplemented with 9.0 μM 4-dichlorophenoxyacetic acid(2,4-D) and 8.8 μM benzyladenine (BA). Calluses developed from both varieties were different in pigmentation.Extract characterization from callus cultures was carried out by high-performance liquid chromatography(HPLC). This analytical process detected several carotenoids; the main pigments in extracts from YF calluswereluteinandzeaxanthin,whereasintheextractsoftheWFcallusthemainpigmentswerelutein,zeaxanthin,β-cryptoxanthin and β-carotene. Callus cultures of T. erecta accumulated pigments even after several rounds ofsubculture.Conclusions:WFcallusappearedtobeasuitablecandidateasasou rceofdifferentcarotenoids,andtestedvarietiescould represent an alternative for further studies about in vitro pigment production.© 2014 Ponticia Universidad Catolica de Valparaiso. Production and hosting by Elsevier B.V. All rights reserved.

Callus culture development of two varieties of Tagetes erecta and carotenoid production