Accumulation, detoxification, and genotoxicity of heavy metals in Indian mustard (Brassica juncea L.)

International Journal of Phytoremediation
Chandra Shekhar SethL K S Chauhan

Abstract

Plants of Indian mustard (Brassica juncea L.) were exposed to different concentrations (15, 30, 60, 120 microM) of (Cd, Cr, Cu, Pb) for 28 and 56 d for accumulation and detoxification studies. Metal accumulation in roots and shoots were analyzed and it was observed that roots accumulated a significant amount of Cd (1980 microg g(-1) dry weight), Cr (1540 microg g(-1) dry weight), Cu (1995 microg g(-1) dry weight), and Pb (2040 microg g(-1) dry weight) after 56 d of exposure, though in shoot this was 1110, 618, 795, and 409 microg g(-1) dry weight of Cd, Cr, Cu, and Pb, respectively. In order to assess detoxification mechanisms, non-protein thiols (NP-SH), glutathione (GSH) and phytochelatins (PCs) were analyzed in plants. An increase in the quantity of NP-SH (9.55), GSH (8.30), and PCs (1.25) micromol g(-1) FW were found at 15 microM of Cd, however, a gradual decline in quantity was observed from 15 microM of Cd onwards, after 56 d of exposure. For genotoxicity in plants, cytogenetic end-points such as mitotic index (MI), micronucleus formation (MN), mitotic aberrations (MA) and chromosome aberrations (CA) were examined in root meristem cells of B. juncea. Exposure of Cd revealed a significant (P < 0.05) inhibition of MI, induc...Continue Reading

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Citations

Oct 4, 2014·Environmental Science and Pollution Research International·Sunita SharmaV K Manchanda
Aug 8, 2015·International Journal of Molecular Sciences·Miguel P MouratoLuisa Louro Martins
Mar 10, 2015·International Journal of Phytoremediation·M Elektorowicz, Z Keropian
Aug 22, 2016·Journal of Environmental Management·Kateřina BřendováPavel Tlustoš
Apr 4, 2013·International Journal of Molecular Sciences·Lyuben ZagorchevMariela Odjakova
Oct 13, 2019·Environmental Science and Pollution Research International·Eleazar RodriguezConceição Santos

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Methods Mentioned

BETA
chromosomal aberrations

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