Figure 4.

Pyoverdine production relative to ancestor for all clones harbouring mutations in phz, pvd or pqs associated loci in iron-limited population evolving with phage. Clones are colour coded based on the population from which they originate. phz mutants produce higher pyoverdine relative to the ancestor (output >1), while pvd and pqs mutations are associated with reduced pyoverdine production (output <1). (Online version in colour.)