Fig. 1.
Cell viability and photosynthetic capabilities of digitally printed cyanobacteria. a Photograph of inkjet-printed Synechocystis cells after 3 days of incubation. Scale bar measures 2 cm. b Chlorophyll fluorescence image of the sample a by imaging PAM, showing maximum quantum efficiency of PSII (Fv/Fm) at the values of about 0.4 according to colour gradient in the legend bar. c The panel compares the growth of Synechocystis colonies before and after the inkjet printing process, following 5 days of incubation on a BG-11 agar plate. A 3 µl aliquot of cells from a dilution series representing 10−1, 10−2 and 10−3 of the original suspension was spotted. For the most dilute cell suspension taken after printing, 90.5 ± 10.6 colonies were counted, whereas 87.5 ± 12.0 colonies were counted before printing. The difference between these values was found to be not statistically significant (one-way ANOVA: p = 0.815) (Supplementary Table 1)