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Defective Production of Mitochondrial Ribosomes in the Poky Mutant of Neurospora crassa

M. R. Rifkin and D. J. L. Luck
Proceedings of the National Academy of Sciences of the United States of America
Vol. 68, No. 2 (Feb., 1971), pp. 287-290
Stable URL: http://www.jstor.org/stable/60361
Page Count: 4
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Defective Production of Mitochondrial Ribosomes in the Poky Mutant of Neurospora crassa
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Abstract

A strain of Neurospora crassa containing a cytoplasmic mutation (poky) affecting mitochondrial function is shown to be deficient in small ribosomal subunits in the mitochondrion during the exponential growth phase. In the stationary growth phase, small subunits are more abundant and are present in mitochondrial ribosomal monomers. This change can be correlated with the return of mitochondrial cytochrome content to amounts approaching those of wild type mitochondria. The ribosomal defect shows an extrachromosomal pattern of inheritance in crosses of poky with wild type.

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