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Ralph Slepecky

Ralph Slepecky

Emeritus Professor
Department of Biology

354 Life Sciences Complex

Past Research Interest

Mechanism of heat resistance of bacterial endospores and initiation of microcycle sporulation in Bacillus subtilis. Induction of mutations by heat and the decreased resistance of DNA-repair-deficient mutant spores point to DNA involvement in the heat resistance of spores; requirement of S-adenosylmethionine for microcycle sporulation suggests methylation involvement in the initiation of sporulation.


  • Ph.D., Microbiology, University of Maryland, 1953
  • M.S., Bacteriology, Pennsylvania State University, 1950
  • B.S., Chemistry, Franklin & Marshall College, 1948

Courses Taught

1963 - 1994: General Microbiology; Microbial Physiology; Industrial Microbiology-Biotechnology; Prokaryotic Differentiation

Mentored 13 PhD's, 9 Master's and 3 Research Associates

Selected Publications

  • Mobberley J, Authement RN, Segall AM, Edwards RA, Slepecky RA, Paul JH . 2010. Lysogeny and sporulation in Bacillus isolates from the Gulf of Mexico. Appl Environ Microbiol. ;76(3):829-42.
  • Slepecky, R. and W.T. Starmer. 2009. Phenotypic plasticity in fungi: A review with observations on Aureobasidium pullulans. Mycologia 101:823-832.
  • Siefert JL, Larios-Sanz M, Nakamura LK, Slepecky RA, Paul JH, Moore ER, Fox GE, Jurtshuk P Jr. (2000) Phylogeny of marine Bacillus isolates from the Gulf of Mexico. Curr Microbiol: 41(2):84-8.