Garlic and cilantro assisted phytoextraction of zinc using Sansevieria roxburghiana from contaminated soil
2021
Mirjankar, Manisha R. | Pattar, Shridhar V. | G, Premakshi H. | Pujar, Namadev K. | Laad, Shruti | Ganeshkar, Madhu P. | Mulla, Sikandar I. | Kamanavalli, Chandrappa M.
Soil pollution caused by toxic and hazardous chemical contaminants is in high enough concentrations to be of risk to plants, wildlife, humans and certainly for soil to itself. Pot experiments were conducted to investigate the phytoextraction capacity of an ornamental plant Sansevieria roxburghiana cultivated in soil artificially contaminated with 200, 400, and 600 mg kg⁻¹ of zinc (Zn) treatments including control for 6 weeks. The soil was amended with garlic and cilantro extracts as the natural irrigation solutions (metal chelants). Garlic application significantly enhanced the Zn accumulation and was found to be the most efficient chelating amendment, increasing concentrations of Zn in roots from 65 mg kg⁻¹ to 423 mg kg⁻¹ dry weight (DW) soil. The phytochemical screening of acetone and ether extracts of S. roxburghiana plant samples revealed the presence of biologically active phytochemicals. Thin layer chromatography (TLC) of plant extracts revealed antibacterial efficacy against pathogenic bacterial strain. The plant samples were also characterized by thermogravimetric analysis and differential scanning calorimetric technique. The use of ornamental plant and varied irrigation solutions in our present study revealed positive effects on growth and phytoextraction together with an improvement of the soil quality.
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