Siderophores are small molecular weight extracellular organic compounds secreted by microorganism under iron-starved condition for capturing and supplying ion to support metabolic activity. Although siderophores are highly specific for Fe, they also have been found to form complexes with metals such as Al, Cd, and Pb. Thus they can play an important role in the complexation of toxic metals and influence on fate and transport of toxic metal in soil. This research focuses on characteristics of siderophore by Bacillus megaterim and its interaction with arsenic in soil. Results show different amount of siderophores was produced at different cell growth phase. Also, siderophores by Bacillus megaterim affect on arsenic mobility in soil somehow by the interaction between arsenic and siderophores in soil. This approach can be contributed to understanding the siderophores-mediated arsenic fate in soil and also apply to remove arsenic by interaction between arsenic and siderophores during phytoextraction.

Siderophore-mediated arsenic transformation in soil and its application in phytoextraction

243rd National Meeting (2012)

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