Table 1

Growth inhibition occurs at the same osmotic concentration in the presence of both ionic and nonionic stressors

StressorNo. of speciesaMIC90 (M)Minimum inhibitory osmotic concn90 (osmol liter−1)Total inhibitory osmotic concn90b (osmol liter−1)
NaCl20.1600.3130.620
KCl20.1600.3130.620
MgCl230.1090.3130.620
Glucose10.3080.3130.620
  • a Number of species into which the stressor molecule dissociates in solution.

  • b Total osmolarity calculated from the measurement of MH osmolarity (0.307 osmol liter−1) plus the calculated osmolarity of the added stressor.