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Phosphate release during growth of Pseudomonas strains on 2PP. Strains were grown in batch cultures. 2PP (2 mM) was used as a source of phosphorus and sodium gluconate (2 g l−1) as a source of carbon. Pi release was measured as described in Materials and Methods. ●, P. fluorescens 23F; ○, P. putida AC577; ▿, P. putida AC577(pLA45); ▾, P. putida AC577(pLA82).
