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antirrhinum majus/papillon-lefevre disease
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Provocation of mutability in the level of mutation expressed at the pal-rec gene in Antirrhinum majus.
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The pallida gene of Antirrhinum majus governs anthocyanin production. The nature of the mutability displayed by its unstable allele pal-rec was dramatically altered following crosses between two pal-rec pal-rec lines with certain separately maintained lines. In both cases a minority of progeny in F1
Evidence for correlation between mutability of an unstable anthocyanin-governing locus and abundance of anthocyanin.
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The pal-rec gene of Antirrhinum majus suppresses anthocyanin except in those cell lines where pal-rec has mutated to Pal, so that anthocyanin-coloured flecks appear on whitish petals. Antirrhinum majus families of very high and very low anthocyanin content (Dark and Pale) were obtained and crossed
Genetic elements inducing gene changes at the pallida locus of Antirrhinum majus.
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The pal-rec-low-o is a special repressed state of the pallida-recurrens allele, which normally mutates from the recessive to the dominant condition, giving pigmented Pal spots on corolla lobes. The pal-rec-low-o in the homozygous condition is stably colorless (except for rare mutant spots), but when
Stable transcription activities dependent on an orientation of Tam3 transposon insertions into Antirrhinum and yeast promoters occur only within chromatin.
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Transposon insertions occasionally occur in the promoter regions of plant genes, many of which are still capable of being transcribed. However, it remains unclear how transcription of such promoters is able to occur. Insertion of the Tam3 transposon into various genes of Antirrhinum majus can confer
Expression patterns of myb genes from Antirrhinum flowers.
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Six genes that contain sequence encoding the DNA binding domain of the Myb oncoproteins have been isolated from a cDNA library prepared from Antirrhinum majus (snapdragon) flowers using oligonucleotide probes directed against part of this domain. The derived amino acid sequences of these genes
Molecular analysis of instability in flower pigmentation of Antirrhinum majus, following isolation of the pallida locus by transposon tagging.
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The pal locus of Antirrhinum majus was cloned using the transposable element, Tam 3, as a probe. The pal clone was used to examine, at the molecular level, those aspects of instability previously observed phenotypically and genetically. The effects of temperature and of genetic background on
Cloning and molecular analysis of structural genes involved in flavonoid and stilbene biosynthesis in grape (Vitis vinifera L.).
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Genes involved in flavonoid and stilbene biosynthesis were isolated from grape (Vitis vinifera L.). Clones coding for phenylalanine ammonia-lyase (PAL), chalcone synthase (CHS), chalcone isomerase (CHI), flavanone 3-hydroxylase (F3H), dihydroflavonol 4-reductase (DFR), leucoanthocyanidin dioxygenase
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