Effect of S. ambofaciens ATCC 23877 on green-yellow fluorescent pigment production by P. fluorescens BBc6R8. (a and b) P. fluorescens BBc6R8 (R8). (c) S. ambofaciens ATCC 23877 (Sa). (d) P. fluorescens BBc6R8 cultivated on medium supplemented with FeSO4. (e and f) P. fluorescens BBc6R8 plus S. ambofaciens ATCC 23877. (g) P. fluorescens BBc6R8 plus S. ambofaciens ATCC 23877 that had been streaked on a plate 30 h before strain BBc6R8. (h) P. fluorescens BBc6R8 plus S. ambofaciens ATCC 23877 cocultivated perpendicularly. (i) P. fluorescens BBc6R8 plus S. ambofaciens ATCC 23877 (streaked on a plate 30 h before strain BBc6R8) cocultivated perpendicularly. (b, c, d, f, g, h, and i) The plates were visualized under UV light. The images were taken from below the plates after a 2-day (co)culture with incubation at 26.5°C on 26A agar medium.