Characterization of Senps Produced by B. Mycoides Selte01 and S. Maltophilia Selte02 and their Biomolecular Organic Material

Elena PIACENZA, University of Calgary - Canada

Our work is focused on the study of the ability of the bacterial strains Bacillus mycoides SelTE01 and Stenotrophomonas maltophilia SelTE02 isolated from the Selenium-hyperaccumulator plant Astragalus bisulcatus, to reduce toxic Selenite oxyanions (SeO32-) into elemental Selenium (Se0) as NPs (SeNPs). Previous reports of other bacterial strains able to produce NPs described the presence of these biogenic NPs embedded in either an organic layer or organic cap; however, the nature of this feature is not completely understood yet. Our interest is in the understanding of the nature and role of the organic surrounding material of the biogenic SeNPs produced by the two studied bacterial strains. Based on our results, our current hypothesis is that this organic material can play a role in both SeNPs synthesis and stabilization process, resulting in peculiar features of the produced biogenic SeNPs.

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