Altered mitochondrial gene expression in the nonchromosomal stripe 2 mutant of maize

Heidi S. Feiler, Kathleen J. Newton

Research output: Contribution to journalArticle

17 Scopus citations

Abstract

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.

Original languageEnglish (US)
Pages (from-to)1535-1539
Number of pages5
JournalEMBO Journal
Volume6
Issue number6
DOIs
StatePublished - Jun 1987

Keywords

  • Gene expression
  • Mitochondrial mutants
  • Zea mays

ASJC Scopus subject areas

  • Neuroscience(all)
  • Molecular Biology
  • Biochemistry, Genetics and Molecular Biology(all)
  • Immunology and Microbiology(all)

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