Figure 3

Change in formation of alkaline and calcification areas on internodal cells with different ages in C. globularis . (collected from Yuno Lake) I. Stereoscopic micrograph of internodal cell (2, 6, 8, 15th cell from the tip of thallus). II. Stereoscopic and SEM micrographs (back-scattered electron image) of 15th internodal cell (a‐d). III and IV. Stereoscopic (above) and SEM micrograph (below) of the 23th internodal cell at low and high magnification, respectively. Scale bars: I‐III, 5 mm; IIa‐d and IV, 1 mm.