Cell wall turnover in phosphate and potassium limited chemostat cultures of Bacillus subtilis W23

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Abstract
Turnover in phosphate and potassium limited chemostat cultures of Bacillus subtilis W23 results in the release of over 80% of the wall material present at the time of chasing equilibrium-labelled cultures. The rate at which turnover proceeds is faster in potassium limited cultures than in phosphate limited cultures but in both cases a fraction of the wall material appears to be conserved, or to undergo turnover at a lower rate. Previously we have shown that the polar wall is less active metabolically than the cylindrical wall and it is possible that the apparently conserved wall is that present in the pole.