Six independent cultures of M145 and 2L12 were grown in non-viscous medium (2xYT), and the morphology of mycelial pellets was analyzed using a Nikon Eclipse 6000 microscope. In order to measure the complete pellets of strain M145, consecutive bright-field images under 10× amplification were taken and stitched together using the ImageJ plugin Stitching (Preibisch et al., 2009) as pellets of the wild type were often too large to fit in a single field. The area of the cross-section of the pellet was measured using ImageJ tools.
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