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Table 2 Chitinase activity of P. chlororaphis strain PA23 and derivative strains

From: The requirement for the LysR-type regulator PtrA for Pseudomonas chlororaphis PA23 biocontrol revealed through proteomic and phenotypic analysis


Chitinase Activity (A550*min−1*mg total protein−1)


Early stationary phasea

Late stationary phasea

PA23 (pUCP22)

0.11 (0.03)

0.12 (0.004)

PA23-443 (pUCP22)

0.0 (0.0)b

0.0 (0.0)c

PA23-443 (ptrA-pUCP22)

0.10 (0.03)d

0.11 (0.01)e

  1. aMean (standard deviation) of enzyme activity of three replicates.
  2. bSignificantly different from wild type (P < 0.005).
  3. cSignificantly different from wild type (P < 0.0001).
  4. dNot significantly different from wild type.
  5. eSignificantly different from wild type (P < 0.05).