In the
case of PDB grown cells and during the stationary phase, the intracellular fluorescent
intensity of the mixed culture is higher than that observed in the exponential phase, which
corresponds to higher accumulation of intracellular lipids. The microscopic analysis
results indicate higher accumulation of lipid molecules inside the cells during the
stationary phase when PDB is the carbon substrate and different than those observed in
the mixed species culture growing on other substrates. Results from the microscopic
analysis are consistent with data obtained from chemical analysis see this chapter 2
section (3.4.3 and 3.4.4).