Abstract

Heavy metal pollution is a sensitive environmental topic with enormous impact on public opinion. Traditional chemical and physical techniques are employed in tackling this problem, often originating from anthropogenic activities. Recently the possibility of using the microbial word in heavy metal polluted sites has been proposed, and scientific literature is now witnessing an increase of publication in this field. The NIH on-line resource founds almost 1000 hits upon searching for bioremediation in the article title starting from 1988 when such definition appears for the first time. Bioremediation has shown promising results that have even spurred entrepreneurial activity in USA and northern Europe. A recent review [1] gives an up-to-date description of the state-of-the-art of the field including example of photosynthetic organisms, plants and algae. In this broad framework, anoxygenic photosynthetic bacteria and in particular the purple bacteria Rhodobacter sphaeroides, are being tested since 2005 in our laboratory [2-5] as tool in heavy metal removal from polluted sites. The effects of several metal ions and oxyanions on the metabolism of R. sphaeroides have been scrutinised using a multidisciplinary approach. The interaction with several metal species will be discussed and the state-of-the-art of our research will be presented along with future directions.References1. Gadd, G.M., Metals, minerals and microbes: geomicrobiology and bioremediation. Microbiology, 2010. 156(Pt 3): p. 609-43.2. Buccolieri, A., et al., Testing the photosynthetic bacterium Rhodobacter sphaeroides as heavy metal removal tool. Ann Chim -Rome, 2006. 96: p. 195-204.3. Giotta, L., et al., Reversible Binding of Metal Ions onto Bacterial Layers Revealed by Protonation-Induced ATR-FTIR Difference Spectroscopy. Langmuir, 2011. 27(7): p. 3762-3773.4. Italiano, F., et al., The photosynthetic membrane proteome of Rhodobacter sphaeroides R-26.1 exposed to cobalt. Res Microbiol, 2011. 162(5): p. 520-527.5. Pisani, F., et al., Soluble proteome investigation of cobalt effect on the carotenoidless mutant of Rhodobacter sphaeroides. J Appl Microbiol, 2009. 106(1): p. 338-49.

Autore Pugliese

• Trotta Massimo

Tutti gli autori

• Trotta M.

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Anno di pubblicazione

2011

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