Siberian Inst. Plant Physiol. Biochem.
Krasnodar Research Institute of Agriculture
|Source of mitochondria||Incorporation of 3H-UTP into acid insoluble mitochondrial fraction, counts/min mg protein|
|5 min||10 min||15 min||20 min|
By the 5th min, the average rate of mtRNA synthesis was similar in mitochondria of the lines and hybrids. However the rate further increased with different acceleration. By the 20th min, the rate showed 5.6-fold increase in the mitochondria of the lines and only 2.5-fold increase in hybrid mitochondria. The high rate of mtDNA transcription in inbred lines may be partially accounted for by stimulating effect of recessive alleles of the nucleus (MNL 62:67, 1988).
As a whole, the data reported here and elsewhere (MNL 61:61, 1987) could
also indicate the existence of negative nuclear control of transcriptive
activity of maize mitochondrial DNA.
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