Effect of the initial [PO
] on T. thermophilus HB8 growth, PHAs accumulation and RLs synthesis. T. thermophilus was grown in MSM containing sodium gluconate (1.5% w/v) as sole carbon source and one of the following initial [PO4
3-] 0.5 mM (a); 5 mM (b); 10 mM (c); 25 mM (d) and 50 mM (e). Symbols: Biomass (CDW) (closed triangles); PHAs production (closed circles); RLs (open circles) and [PO4
3-] (reversed closed triangles).