In general, uptake of a metal involves three phases: (i) metal transport across the root cell plasma membrane, (ii) root to shoot translocation, and (iii) metal detoxification and sequestration [30]. Of these, the most critical is the transport of metal across the plant cell membrane. Plant cell walls have different chemical functional groups that act as binding sites for metal uptake, mainly carboxyl,amine and hydroxyl groups. Although considerable research has been undertaken on elucidating the mechanism of uptake of essential and non-essential metals, to date the mechanism for Au uptake in plants remains unclear. To understand the uptake of Au and its intracellular transport, understanding the chemistry of Au in solution is crucial. Au is a soft acid in its cationic form, will bind with soft bases (S and N containing functional groups) and hence it is expected to form covalent bonds