FIG. 4.

FB₁ production by the wild type (wt) and the zfr1 deletion mutant on whole cracked maize kernels and separated maize kernel germ and degermed tissues. (A) Wild-type and zfr1Δ mutant (zfr1 deletion) strains cultured on whole cracked maize kernels for 28 days and analyzed for FB₁ every 7 days. (B) Wild-type and zfr1Δ mutant strains cultured for 7 days on separated germ and degermed maize kernel tissue fractions and analyzed for FB₁ production. All values are averages of three repetitions, and error bars indicate standard errors greater than 5% of the mean value.