Altered mitochondrial gene expression in the nonchromosomal stripe 2 mutant of maize
AUTOR(ES)
Feiler, Heidi S.
RESUMO
The genetic and molecular analyses of higher plant mitochondria can be facilitated by studying maternally-inherited mutations, such as the nonchromosomal stripe (NCS) mutants of maize, that have deleterious effects on plant growth. We have previously demonstrated a correlation between specific alterations in mitochondrial DNA and the expression of NCS phenotypes. In the present studies, the effects of the NCS2 mutation on mitochondrial gene expression are evaluated. Proteins synthesized by mitochondria isolated from NCS2 mutants and from related plants with normal growth have been compared. NCS2 mitochondria synthesize much reduced amounts of a single polypeptide. Probes corresponding to the mitochondrial DNA region altered in NCS2 hybridize to an aberrant set of transcripts in NCS2 mitochondria. Transcripts homologous to several previously characterized plant mitochondrial genes are similar in NCS2 and related non-mutant mitochondria.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=553521Documentos Relacionados
- Mitochondrial DNA changes in abnormal growth (nonchromosomal stripe) mutants of maize
- Nonchromosomal Stripe of Maize
- Altered mitochondrial gene expression in a maternal distorted leaf mutant of Arabidopsis induced by chloroplast mutator.
- Transcriptional and posttranscriptional regulation of maize mitochondrial gene expression.
- An abnormal growth mutant in maize has a defective mitochondrial cytochrome oxidase gene.
