SLIME AS A POSSIBLE FACTOR IN CELL CLUMPING IN NOCARDIA CORALLINA

Slime as a possible factor in cell clumping in Nocardia corallina.

Work on the nuclear cytology and life cycle of Nocardia corallina has previously been reported (Webb et al., 1954; Webb and Clark, 1957; Clark and Frady, 19.57). Extensive studies on the radiation response, physiology, and genetics of this organism have also been carried ouit in this laboratory. Throughout this work, one of the main problems involved in the experimental approach has been the el...

Fat bodies in Nocardia corallina.

* Calculated from the zero-time viable spore concentration taken as 0 per cent germination. The data shown in table 1 indicate that the phenol-inactivation method and the dilution heat-shock method were superior to the conventional heat-shock method usually employed in germination studies if germination rates are desired. This was especially true for short incubation times when the germination ...

Pigment of Nocardia corallina.

Variation to radiation resistance in Nocardia corallina.

The frequently encountered variation in radiation response of cultures of a microorganism can be attributed to any of several factors. Such variation can be caused by multinuclearity, polycellularity, or the presence of cell clumps (Clark and Webb, 1955a). When such factors are adequately controlled, the results can be attributed to variation in ploidy (Clark and Webb, 1955b), gene damage (Clar...

Cytogenetic study of Nocardia corallina.

Cytogenetics has proved to be a valuable aid in the study of higher organisms but has received only limited attention in microbiology. Witkin (1951), Ryan et al. (1954) and Ryan and Wainwright (1954) have successfully applied cytogenetic approaches to the study of bacteria. Haploid and diploid cultures of Escherichia coli strain K-12 were studied cytologically by Lederberg et al. (1951) in an e...