Screening of Indian mustard genotypes for heavy metal accumulation tendency under in-vitro conditions
Indian mustard (Brassica juncea L.Czern. & Coss.) have been established as a potential phytoremediator for heavy metals. It may be due to its inherent metal tolerance genes, which is not yet been identified. Heavy metal contamination of soils is increasing nowadays. Cadmium (Cd) and nickel (Ni) are some of the examples for heavy metals found in the soil. The ability of Indian mustard genotypes to accumulateCd and Ni was assessed under controlled conditions. The soils were artificially c ontaminated by 3 and 5mM metal concentrations of both cadmium acetate and nickel sulphate with respect to control. Shoot length, root length,fresh weight and dry weight of genotypes were analyzed at 60, 90 and 105 days after germination. Heavy metal accumulation (Both roots and shoots) and yield attributes at the time of harvesting were also analyzed. Our results showed significant difference in the case of root length, shoot length, fresh weight and dry weight between Cd and Ni treatments. Exogenous supply of 3mM Cd and Ni caused less reduction in root and shoot length in most of the genotypes whereas at higher doses (5mM) caused more reduction. At a stress dose of 5mM, the nickel accumulation in the shoots and roots was on average of 16.1, 0.75μgm/gm dry weight respectively. For the same stress dose, cadmium accumulation in shoots and roots was an average of 31.40μgm/gm and 12.71 μgm/gm dry weight respectively. In both the cases shoots accumulated more amount of heavy metals compared to roots. It is,therefore, Brassica juncea offers better accumulation potential for Cd compared to Ni.
Indian mustard phytoextraction nickel cadmium
S.Tickoo Sindhu.V.K S.Sahni H.B.Singh
Mustard Research and Promotion Consortium, 307, Jyoti Shikar Building, District centre, Janakpuri, New Delhi-110058, India
国际会议
第十二届国际油菜大会( The 12th International Rapeseed Congress)
武汉
英文
1651-1654
2007-03-26（万方平台首次上网日期，不代表论文的发表时间）