Montag, 17. Juni 2013, 16:30 - 18:00 iCal

New insights into microbial siderophore production under various environmental conditions

Current Issues in Environmental Geosciences II

Eberhard Clar-Saal (2B 204), Fakultät für Geowissenschaften, Geographie und Astronomie
Althanstrasse 14, UZA 2, 1090 Wien

Seminar, Workshop, Kurs

Iron has been identified as an essential micronutrient for most microorganisms and is involved in several important enzymatic processes, as well as acting as electron acceptor or donor in metabolic processes. Although iron is a common element found in the environment and in tissues of all types, it is rarely found in a “free” form. Microorganisms synthesize and excrete so called siderophores that are powerful iron scavenging agents that have the ability to mobilize iron directly from insoluble iron phases at pH neutral conditions where the bioavailability of iron is extremely low, or to bind iron to defense themself against iron overload at extreme iron concentrations. In environments where the majority of the iron will be in a soluble, chelated, or organically bound form siderophores are also required for scavenging iron from other microorganisms. New insights into the production of siderophores in terrestrial and aquatic environments, and in controlled laboratory experiments, will be discussed, in the context of the potential roles siderophores play in the geochemical cycling of iron in the environment.


Dr. Sara Holmström, Stockholm University, Sweden


Vesna Micic Batka
Department of Environmental Geosciences
Environmental Geosciences Group