Mating Type Linked Mutations Which Disrupt the Uniparental Transmission of Chloroplast Genes in Chlamydomonas
AUTOR(ES)
Gillham, Nicholas W.
RESUMO
In Chlamydomonas reinhardtii, chloroplast genomes are normally transmitted by the mating type plus (mt+) parent and mitochondrial genomes by the mating type minus (mt- ) parent. In this paper we describe three new nuclear mutations, designated mat-3-1 to -3, which are tightly linked to the mt + allele and permit high transmission of chloroplast genomes from the mt- parent, but have no effect on transmission of mitochondrial genomes. We also show that mat-1, reported by others to be a nuclear mutation linked to mt- which promotes transmission of chloroplast genomes by the mt- parent, is probably a vegetative diploid since it contains both mt+ and mt- alleles. Vegetative diploids behave as if they are mt- with respect to mating, but posses a level of chloroplast gene transmission intermediate between that of haploid mt- and mt+ stocks.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=1203100Documentos Relacionados
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