Extended Data Fig. 6: Mapping spatial variation in chemical polarity of the plasma membrane in M. oryzae appressoria using the solvatochromic probe NR12S.

a, Chemical structure of NR12S. b,c Schematic illustrations showing the mechanism by which NR12S reports changes in chemical polarity and lipid phase. d-j, Intensity ratio chemical polarity maps in M. oryzae wild type strain Guy11 4 h appressoria. Images e, f, h and i are magnified areas of 4 h appressoria. The colour scale translates the intensity ratio values (n = 31 three independent repetitions of the experiment were performed). N+-BDP 4 h and N+-BDP 24 h FLIM images included for comparison. k-p, Intensity ratio chemical polarity maps of M. oryzae wild type strain Guy11 24 h appressoria. Images I, m, o and p are zoomed in areas of 24 h appressoria, Total observations n = 34 appressoria in 3 biological replicates. Images are representative of n = 3 independent repeats of the experiment. Images d, g, j, k and n, scale bars = 5 μm, images e, f, h, i, l, m, o and p scale bars= 1 μm. Image created with BioRender.com.