Figure 1.
Light microscope (1000×) pictures of microalgae isolates.
Figure 2.
Cyclic voltammograms of strain A8 on glassy carbon under anaerobic conditions.
Figure 3.
Scanning electron micrographs of A8 cell.
A: Magnification×2000; B: Magnification×11000. The strain A8 shows small dents observed at the poles (shown in thin arrow).
Figure 4.
Transmission electron micrographs of A8 cell.
A: Transverse section through two-celled coenobia, Bar = 2 µm; B: Transverse section through a cell, Bar = 0.5 µm; C: Part of a cell wall, Bar = 0.5 µm (Abbreviations: Ch = chloroplast; Cl = cellulosic layer; M = mitochondrial profiles; Nu = nucleolus; P = pyrenoid; S = starch; Sp = spine.).
Figure 5.
Phylogenetic tree of strain A8 and closely related species based on ITS sequences of ribosomal DNA.
The tree was constructed using the neighbor-joining method. The numbers at nodes indicate the percentages of occurrence of the branching order in 1000 bootstrapped trees for values greater than 50%. Scale bar = 1% divergence.
Figure 6.
Current–time responses of strain A8 at potentials of +0.2,−0.2 and −0.4 V versus Ag/AgCl under illumination.
Figure 7.
Current responses to light and dark at −0.4 V. The grey shaded zones indicate dark conditions.
Figure 8.
Profiles of dissolved oxygen within the A8 biofilm.