Callus Initiation and Regeneration in Mentha

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  • 1 Delaware Agricultural Experiment Station, Department of Plant Science, College of Agricultural Sciences, University of Delaware, Newark, DE 19717-1303

Plant regeneration from callus cultures of mint depended on expiant source, genotype, and culture medium components. Mature embryos, seedling and flower parts, as well as chilled or desiccated immature embryos of peppermint (Mentha piperita L.) and spearmint (Mentha spicata L.) were cultured on a Murashige-Skoog medium containing various combinations of growth factors. Shoots regenerated from callus that developed either on mature peppermint embryos cultured on medium that contained BA at 0.5 mg·liter-1 and NAA at 0.5 mg·liter-1 or on immature peppermint embryos (chilled at SC for 0.6 day or nonchilled) cultured on basal medium containing BA at 1 mg·liter-1 and TIBA at 1 mg·liter-1 Shoots were proliferated, rooted, and acclimated. with 100% survival under greenhouse conditions. Chemical names used: N-(phenylmethyl) -1H-purin-6-amine (BA); 1-naphthaleneacetic acid (NAA); 2,3,5-triiodobenzoic acid (TIBA).

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