FIG 3.

Characteristics of 59 soil bacterial isolates (including 22 Streptomyces isolates) grown on various solid media. (A) Complex media generally supported more growth than defined media. The inclusion of an inorganic phosphate source assisted growth in defined media. Note, all isolates were required to grow on NB-A for inclusion in the experiment. (B) Of the strains that grew (points), complex media enabled faster time to visible growth than defined media. Black bars indicate median time to visible growth. (C) Of the 22 Streptomyces isolates, only a fraction that grew also sporulated within 10 days, with the exception of S-CAA-A where all isolates both grew and sporulated. Crosshatching indicates percentage of Streptomyces isolates that sporulated. (D) Time of first visible sporulation for Streptomyces isolates varied considerably from strain-to-strain.