Figure 1 in More than meets the eye: regional specialisation and microbial cover of the blade of Porphyra umbilicalis (Bangiophyceae, Rhodophyta)

Figure 1: Anatomy of a typical blade of Porphyra UMbilicalis on the Maine coast. Cartoons show the regions of the blade en face (A) and as a longitudinal cross-section from the margin to the holdfast (M mature spores, N developing neutral spores, V central vegetative area, R rhizoid cells), which is composed of thousands of rhizoid cells. The middle panel and right panels, confocal and brightfield images respectively, show representative areas of four distinct regions of the blade: mature spores – A, B; developing neutral spores – D, E; central vegetative area – F, G; and rhizoid cells – H, I. Note the change in spacing of cells and amount of intervening cell wall (confocal images generated by exciting photosynthetic pigments) and transition in colour from green to red (longitudinal cartoon, brightfield images). Scale bars = 20 µm.