Hassi Ummehani, Hossain Md Tawhid, Huq S M Imamul
Department of Soil, Water & Environment, Faculty of Biological Science, University of Dhaka, Dhaka, 1000, Bangladesh.
University of Barisal, Kornokathi, Barisal, 8200, Bangladesh.
Environ Monit Assess. 2017 Oct 10;189(11):550. doi: 10.1007/s10661-017-6270-2.
Dangers of arsenic contamination are well known in human civilization. The threat increases when arsenic is accumulated in food and livestock through irrigated crops or animal food. Hence, it is important to mitigate the effects of arsenic as much as possible. This paper discusses a process for reducing the level of arsenic in different parts of rice plants with an aquatic fern, Marsilea minuta L. A pot experiment was done to study the possibility of using Marsilea minuta as a phytoremediator of arsenic. Rice and Marsilea minuta were allowed to grow together in soils. As a control, Marsilea minuta was also cultured alone in the presence and absence of arsenic (applied at 1 mg/L as irrigation water). We did not find any significant change in the growth of rice due to the association of Marsilea minuta, though it showed a reduction of approximately 58.64% arsenic accumulation in the roots of rice grown with the association of fern compared to that grown without fern. We measured a bioaccumulation factor (BF) of > 5.34, indicating that Marsilea minuta could be a good phytoremediator of arsenic in rice fields.
砷污染的危害在人类文明中是众所周知的。当砷通过灌溉作物或动物饲料在粮食和牲畜中积累时，这种威胁就会增加。因此，尽可能减轻砷的影响非常重要。本文讨论了一种利用水生蕨类植物小叶萍降低水稻植株不同部位砷含量的方法。进行了一项盆栽试验，以研究使用小叶萍作为砷植物修复剂的可能性。水稻和小叶萍被允许在土壤中共同生长。作为对照，小叶萍也在有砷（以1毫克/升的浓度作为灌溉水施加）和无砷的情况下单独培养。尽管与未与蕨类植物共生种植的水稻相比，与蕨类植物共生种植的水稻根部砷积累量减少了约58.64%，但我们未发现由于与小叶萍共生而导致水稻生长有任何显著变化。我们测得生物积累因子（BF）>5.34，表明小叶萍可能是稻田中砷的良好植物修复剂。
