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CuO Nanoparticles Inhibited Root Growth from Brassica nigra Seedlings but Induced Root from Stem and Leaf Explants

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Abstract

Interests associated with nanoparticles (NPs) are budding due to their toxicity to living species. The lethal effect of NPs depends on their nature, size, shape, and concentration. Present investigation reports that CuO NPs badly affected Brassica nigra seed germination and seedling growth parameters. However, variation in antioxidative activities and nonenzymatic oxidants is observed in plantlets. Culturing the leaf and stem explants on MS medium in presence of low concentration of CuO NPs (1–20 mg l−1) produces white thin roots with thick root hairs. These roots also show an increase in DPPH radical scavenging activity (up to 80 % at 10 mg l−1), total antioxidant, and reducing power potential (maximum in presence of 10 mg l−1 CuO NPs in the media). Nonenzymatic antioxidative molecules, phenolics and flavonoids, are observed elevated but NPs concentration dependent. We can conclude that CuO NPs can induce rooting from plant explants cultured on appropriate medium. These roots can be explored for the production of active chemical constituents.

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Abbreviations

DPPH:

2,2-Diphenyl-1-picryl hydrazyl

NPs:

Nanoparticles

TPC:

Total phenolic contents

TFC:

Total flavonoid content

TAC:

Total antioxidant capacity

TRP:

Total reducing power

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Acknowledgments

The authors are thankful to the Higher Education Commission Pakistan for provision of partial funding for the research work under Indigenous PhD Fellowship Program.

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Authors and Affiliations

  1. Department of Biotechnology, Quaid-i-Azam University, Islamabad, 45320, Pakistan

    Hira Zafar, Attarad Ali & Muhammad Zia

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  1. Hira Zafar
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  2. Attarad Ali
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  3. Muhammad Zia
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Correspondence to Muhammad Zia.

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Zafar, H., Ali, A. & Zia, M. CuO Nanoparticles Inhibited Root Growth from Brassica nigra Seedlings but Induced Root from Stem and Leaf Explants. Appl Biochem Biotechnol 181, 365–378 (2017). https://doi.org/10.1007/s12010-016-2217-2

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  • DOI: https://doi.org/10.1007/s12010-016-2217-2

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