Abstract

Catharanthus roseus is containing anticancer alkaloids vincristine and vinblastine as is an important medicinal plant. Several studies have conducted on in-vitro culture of this plant. To optimize the somatic embryogenesis, a factorial based on CRD experiment with 10 replications was conducted. Root, hypocotyl and leaf explants grown in-vitro were transferred and cultured on MS media containing different combinations of 2,4-D, NAA and 2,4-D×BAP. The results revealed that in callogenesis, the interaction effects of root and hypocotyl explants×2,4-D and NAA as well as hypocotyl×(1 mg l-1 NAA+1 mg l-1 BAP) was superior than other treatments (p≤0.01). For calli fresh weight, hypocotyl×NAA and hypocotyl×(1 mg l-1 NAA+1 mg l-1 BAP) was the treatment of choice (p≤0.01). The calli produced were sub-cultured to attain the pre-embryos and somatic embryos. For the number of pre-embryos and somatic embryos; the interaction of hypocotyl×2,4-D was the best and most efficient treatment. Seemingly, the production of somatic embryos is accessible in this plant by the logical management of growth regulator combinations. Furthermore, the production and genetic engineering of the somatic embryos could be a promising trend in the subsequent production of high-valued metabolites from this plant.

Highlights

  • IntroductionThe most important alkaloids extracted from the shoots of this plant are vincristine and vinblastine, with a well­ defined anti­cancer properties (Mujib et al, 2012)

  • To optimize the somatic embryogenesis, a factorial based on completely randomized design (CRD) experiment with 10 replications was conducted

  • The results showed that the effect of plant growth regulators and explants, and their interactions were significant (p≤0.01) on the number of pre­embryos and somatic embryos produced

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Summary

Introduction

The most important alkaloids extracted from the shoots of this plant are vincristine and vinblastine, with a well­ defined anti­cancer properties (Mujib et al, 2012). The amount of these compounds in this plant is about 0.0005% of dry weight of the plant and their extraction is costly and time consuming (Barrales­Cureño et al, 2017). These problems have led the scientists to a new approaches of tissue culture studies in C. roseus L. The first studies on somatic embryogenesis in the Catharanthus roseus (L.) G. The phe­ nomenon of genotype­dependent plant regeneration exists in other plant species (Firoozabady and De Boer, 1993)

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