Imaging of musty-odor producing filamentous cyanobacteria by various microscopies

A method for the determination of filamentous cyanobacteria producing musty-odor substances quickly and accurately by soft X-ray microscopy (XM) was developed and applied to Phormidum tenue sp. (Pseudanabaena sp.) green strain (PTG). To improve the identification accuracy of PTG, PTG was observed by soft XM using two wavelengths above and below the K-edge of oxygen. Two types of granules were confirmed. Since a granule of which oxygen is a major constituent element is identified as polyphosphate granule, polyphosphate granule and carboxysome are identified, respectively.