Resistance to azetidin-2-carboxylic acid and sodium chloride tolerance in carrot cell cultures and Spirulina platensis.

Mutants of Spirulina platensis and of Daucus carota resistant to azetidine-2carboxylic acid were tested for NaCl tolerance. A positivr correlation was found between proline overproduction and osmotolerance. In carrot lines proline overproduction was not strictly proportional to NaCl tolerance insofar as cells chracterized by differences in proline overproduction showed similar osmotolerance, suggesting that pother factors could be involved.