Adejumo, Sifau A. and Tiwar, Sarita and Thul, Sanjog and Sarangi, Bijaya Ketan (2019) Evaluation of Lead and chromium tolerance and accumulation level in Gomphrena celosoides: A novel metal accumulator from lead acid battery waste contaminated site in Nigeria. International Journal of Phytoremediation, 21 (13). pp. 1341-1355. ISSN 1522-6514 (P); 1549-7879 (E)

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Biology, tolerance, and metal (Pb and Cr) accumulating ability of Gomphrena celosoides were studied under hydroponic conditions. The seedlings were raised in Hoagland’s solution containing different concentrations of Pb (0, 500, 1000, 1500, 2000, 3000, 4000, and 5000mg l�1) and Cr (0, 50, 100, 150, 200, 300, and 400mg l�1). Biomass and metal accumulation in different plant parts were determined at seven (7) and fourteen (14) days after stress. Antioxidant enzyme activities, protein, and proline contents were estimated in stressed and unstressed plants. Gomphrena celosoides was able to tolerate Pb and Cr concentrations up to 4000 and 100mg l�1, respectively in hydroponic solution. Metal accumulation was concentration and duration dependent with the highest Pb (21,127.90 and 117,985.29mg kg�1) and Cr (3130.85 and 2428.90mg kg�1) in shoot and root, respectively found in the plants exposed to 5000mg l�1 Pb and 400mg l�1 Cr for 14 days. Proline, antioxidant enzyme activities, and protein contents were the highest in plant exposed to higher Pb and Cr concentrations for 7 and 14 days. Gomphrena celosoides could be considered as Pb and Cr accumulator with proline and increase in antioxidant enzyme activities being the tolerance mechanisms.

Item Type: Article
Uncontrolled Keywords: Tolerance; Hyperaccumulation; Osmolytes; Abiotic Stress; Metallophytes; Heavy Metals; Antioxidants
Subjects: Environmental Biotechnology
Hevey Metals
Depositing User: Dr. S Thul
Date Deposited: 13 Jan 2021 09:48
Last Modified: 13 Jan 2021 09:48

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