Summary
Observations were made of the changes in frequency of two genetically different culture lines ofDaucus carota (designated DBB and DSL) during successive subcultures of mixed cultures. Under conditions of phosphate limited growth, one line (DSL) had a competitive advantage over the other. Under other cultural conditions, this competitive interaction was removed or reversed. Detailed comparisons of the growth patterns and phosphate uptake rates of the two culture lines grown separately allowed prediction of their behaviour in mixed cultures. Deviations of observed from predicted behaviour in mixed cultures demonstrated that the dominant culture line (DSL) could compete more effectively for the available phosphate, thereby modifying the growth of line DBB and causing its elimination from mixed cultures. It is concluded that the phosphate limited medium in which these culture lines were initiated had selected genotypes differing in their efficiencies of phosphate utilisation.
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Bayliss, M.W. The causes of competition between two cell lines ofDaucus carota in mixed culture. Protoplasma 92, 117–127 (1977). https://doi.org/10.1007/BF01280204
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DOI: https://doi.org/10.1007/BF01280204