16. Beneficial traits of chromium resistant bacteria: Mini review
Abstract
Now a day with advancement of technology, the heavy metals are mainly being generated. These heavy metals have highest toxicity even in low concentration. The chromium Cr (6) produced by industries is one of toxic heavy metals and its removal from the environment is necessary for the safety of all living things including humans. The microorganisms particularly Cr resistance bacteria play an important role in the removal of Cr from environment. The Cr resistance bacteria diminish Cr by different ways e-g by binding with heavy metals Cr, reduction of toxic form to naturally occurring form by using chromium in metabolism forming less harmless by- products etc. This trait of bacteria is considered beneficial for plants as chromium resist the growth of plants and these bacteria promotes the growth of plants by behaving like a bio-sorption surface, substituting noxious chemical ions into less noxious form. These bacteria reside in the roots of plants and produce many products e.g. indole acetic acid, (ACC) aminocyclopropane-1-carboxylic acid deaminase, extracellular polymeric substances and reduction of Cr heavy metal. This review can help researchers to work on these beneficial traits of bacteria in order to discover more about them to produce different beneficial products.
Keywords: ACC deaminase; Chromium reduction; Chromium resistant bacteria; Extra cellular polymeric substances; Indole acetic acid
