FIGURE 1.

Phycocyanin autofluorescense of B481-SD and B481-WT strains reflected by 590 nm excitation and 650 nm emission. B481-SD strain was exposed to concentrations ranging from 0.2 to 102.5 mg/L ampicillin, cefotaxime, kanamycin, and tetracycline (A–D), and B481-WT strain to ampicillin and kanamycin concentrations ranging from 0.2 to 102.5 mg/L; 0.05–102.5 mg/L for cefotaxime and 0.2–410 mg/L for tetracycline (E–H). Both strains were cultivated in antibiotics for 6 days at 28°C with a light intensity of 30 μmol m^{– 2} s^–1. Mean and standard deviations are indicated by error bars.