Hydrocarbon and Lipid Microbiology Protocols: Ultrastructure and Imaging

by Terry J. McGenity

This Volume presents key microscopy and imaging methods for revealing the structure and ultrastructure of environmental and experimental samples, of microbial communities and cultures, and of individual cells. Method adaptations that specifically address problems concerning the hydrophobic components of samples are highlighted and discussed. The methods described range from electron microscopy and light and fluorescence microscopy, to confocal laser-scanning microscopy, and include experimental set-ups for the analysis of interfacial processes like microbial growth and activities at hydrocarbon:water interfaces, biofilms and microbe:mineral interfaces. Three forms of fluorescence in situ hybridization – CARD-FISH, MAR-FISH and Two-pass TSA-FISH – are described for the ecophysiological analysis of functionally active microbes in samples. The methods presented will enable readers to obtain an ultrastructural picture of, and identify the key functional microbes in, samples under investigation. This in turn will constitute a key framework for the interpretation of information from other experimental approaches, such as physicochemical analyses and genomic investigations.