Fig. 1

Strain collection location and photomicrographs of M. panniformis FACHB1757. The strain was originally isolated from Meiliang Bay of Lake Taihu in August 2011 and deposited in the Freshwater Algae Culture Collection at the Institute of Hydrobiology (FACHB-collection, China) with the unique identifier FACHB1757 in 2012. a The precise position of the isolated sample is indicated by a star; WT means Wutang station in Lake Taihu. b The morphology of the strain colonies in the white disk, which were collected directly from the water surface using a plastic bucket (on September 15, 2013 in Meiliang Bay, photo with a Nikon D7000). c, d Flat colonies with small holes as viewed under an optical microscope