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In vitro plant regeneration of Ocimum basilicum L. is accelerated by zinc sulfate

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Abstract

This article describes a fast, simple, and efficient plant regeneration protocol for Ocimum basilicum L. Two sets of experiments were performed. The first set was performed on Murashige and Skoog (MS) medium lacking zinc sulfate heptahydrate (ZnSO4·7H2O) and containing varying concentrations of indole-3-acetic acid (IAA). The second set used three different concentrations (8.6, 12.9, and 17.2 mg L−1) of ZnSO4·7H2O along with varying concentrations of IAA. In the first set, without zinc sulfate, an IAA concentration of 1.0 mg L−1 (MS4) was found to be most effective, producing a mean of 12.6 roots per hypocotyl explant, while shoots were not produced. In the second set, with zinc sulfate, a combination of 12.9 mg L−1 ZnSO4·7H2O + 1.0 mg L−1 IAA (MS11) produced significantly more shoots per explant (15 shoots) than a combination of 12.9 mg L−1 ZnSO4·7H2O + 0.5 mg L−1 IAA (MS10), which produced only six shoots. Later, the plantlets were successfully acclimatized (100%) and finally transferred to the greenhouse (ex vitro). In the O. basilicum plants grown using MS11 medium, total phenolic content and rosmarinic acid content were estimated from stem, shoot tip, and old leaf tissue of in vitro plantlets, ex vitro plantlets, and flowering plants. The highest amounts of total phenolic content (131.8 mg gallic acid equivalent g−1 DW) and rosmarinic acid (13.0 mg g−1 DW) were obtained in the old leaf tissue at flowering time. This rapid regeneration protocol for O. basilicum L. represents a major improvement over the conventional protocols for plant regeneration and propagation of this species.

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Acknowledgments

The authors thank TUBITAK for partial financial support. We are grateful to the Department of Biology, Abant Izzet Baysal University, for providing lab facilities. We also thank N. Sahbaz for providing the O. basilicum seeds.

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  1. Sandeep Kumar Verma

    Present address: Department of Horticulture, Institute of Agriculture and Life Science, Gyeongsang National University, Jinju, 660701, South Korea

Authors and Affiliations

  1. Department of Biology, Abant Izzet Baysal University, Bolu, 14280, Turkey

    Sandeep Kumar Verma, Gunce Sahin & Ekrem Gurel

  2. School of Mechanical Engineering, Gyeongsang National University, Jinju, 660701, South Korea

    Ashok Kumar Das

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  1. Sandeep Kumar Verma
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  2. Gunce Sahin
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  3. Ashok Kumar Das
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Correspondence to Sandeep Kumar Verma.

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Editor: Neftali Ochoa-Alejo

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Verma, S.K., Sahin, G., Das, A.K. et al. In vitro plant regeneration of Ocimum basilicum L. is accelerated by zinc sulfate. In Vitro Cell.Dev.Biol.-Plant 52, 20–27 (2016). https://doi.org/10.1007/s11627-015-9739-0

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