Fig. 4
Validation of Chl contents and growth rates of mutant strains selected for reduced Chl contents. The phenotypes of seven mutant strains selected for their reduced Chl contents regardless of the mutagenesis method were validated by measuring Chl content (a) and growth rate (b). Growth rates were evaluated using the concentrations of cells on the 4th day when the cells were still growing exponentially. The data are expressed as the mean ± SD, n = 6; all mutant strains exhibited significantly different Chl contents compared with WT (ANOVA, p value <0.05)