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Two-component heterokaryons were formed with the fungus Neurospora crassa. The UV-sensitive mutations upr-I, uvs-4, and uvs-6 were utilized. Conidia produced by these heterokaryons were exposed to gamma-rays and survival curves were established for the three conidial fractions produced by each heterokaryon. Results showed that upr-I, when included in only one nuclear component, did not affect the sensitivity of any conidial fraction; however, when included in both components, all three conidial fractions exhibited two- to four-fold decreases in survival at the 30 krad exposure. The uvs-4 mutation, when included in one or both components, did not increase the sensitivity of any conidial fraction and appeared, in contrast, to impart a small increase in resistance to inactivation by gamma-rays. When included in only one component, uvs-6 increased the sensitivity of homokaryotic uvs-6 conidia but had no affect on the other two conidial fractions. When included in both components, uvs-6 resulted in exponential inactivation curves and at the 30 krad exposure, 100-fold decreases in survival for all three conidial fractions.
M D Shelby, and
G J Stine, and
F J De Serres
July 1955,
Genetics,
M D Shelby, and
G J Stine, and
F J De Serres
January 1970,
Molecular & general genetics : MGG,
M D Shelby, and
G J Stine, and
F J De Serres
August 1971,
Cryobiology,
M D Shelby, and
G J Stine, and
F J De Serres
August 1973,
Genetics,
M D Shelby, and
G J Stine, and
F J De Serres
October 1961,
Biochemical and biophysical research communications,
M D Shelby, and
G J Stine, and
F J De Serres
January 1958,
Zeitschrift fur Vererbungslehre,
M D Shelby, and
G J Stine, and
F J De Serres
June 1967,
Nature,
M D Shelby, and
G J Stine, and
F J De Serres
March 1991,
The Journal of biological chemistry,
M D Shelby, and
G J Stine, and
F J De Serres
May 1979,
Journal of bacteriology,
M D Shelby, and
G J Stine, and
F J De Serres
March 1987,
Mutation research,
