Microbial involvement in the dynamics of arsenic in irrigated agricultural systems of Bangladesh

Arsenic (As) contamination of groundwater in deltaic regions particularly in the Gangetic alluvium of Bangladesh is one of the world’s most important natural calamities (Imamul Huq and Naidu 2005) and which due to its systematic irrigational use has resulted in substantial accumulation in topsoil and eventual entry into rice plants (Imamul Huq et al. 2001).