SUMMARY: Several Gram-positive bacilli and Gram-negative bacteria were found to differ markedly in their ability to concentrate Mg from simple chemically defined media. In cultures of the Gram-negative bacteria the uptake of Mg was quantitative over the range where growth was limited by the concentration of Mg. The Gram-positive bacilli, however, were unable to utilize Mg when the external concentration was low, and at higher concentrations sufficient to support about half maximal growth, assimilated less than 50% of the available Mg. Both Gram-negative and Gram-positive organisms initially liberated Mg when suspended in Mg-free media, the Mg being re-utilized rapidly by the Gram-negative organisms. In suspensions of the liberation of Mg was independent of temperature and the re-utilization of Mg was dependent on temperature.


Article metrics loading...

Loading full text...

Full text loading...


Most cited this month Most Cited RSS feed

This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error