GEPHE SUMMARY Print
Gephebase Gene
Entry Status
Published
GepheID
GP00002092
Main curator
Courtier
PHENOTYPIC CHANGE
Trait Category
Trait State in Taxon A
Petunia axillaris
Trait State in Taxon B
Petunia axillaris - white flowers with red and pink revertant spots
Ancestral State
Taxon A
Taxonomic Status
Taxon A
Common Name
-
Synonyms
large white petunia; white moon petunia; Petunia axillaris (Lam.) Britton, Stern & Poggenb.; Petunia axilliaris
Rank
species
Lineage
Show more ... tina; Embryophyta; Tracheophyta; Euphyllophyta; Spermatophyta; Magnoliophyta; Mesangiospermae; eudicotyledons; Gunneridae; Pentapetalae; asterids; lamiids; Solanales; Solanaceae; Petunioideae; Petunia
NCBI Taxonomy ID
is Taxon A an Infraspecies?
No
Taxon B
Common Name
-
Synonyms
large white petunia; white moon petunia; Petunia axillaris (Lam.) Britton, Stern & Poggenb.; Petunia axilliaris
Rank
species
Lineage
Show more ... tina; Embryophyta; Tracheophyta; Euphyllophyta; Spermatophyta; Magnoliophyta; Mesangiospermae; eudicotyledons; Gunneridae; Pentapetalae; asterids; lamiids; Solanales; Solanaceae; Petunioideae; Petunia
NCBI Taxonomy ID
is Taxon B an Infraspecies?
Yes
Taxon B Description
petunia line W138
GENOTYPIC CHANGE
Presumptive Null
Yes
Molecular Type
Aberration Type
Insertion Size
-
Molecular Details of the Mutation
insertion of a dTph1 transposon in the AN1 gene
Experimental Evidence
Authors
Spelt C; Quattrocchio F; Mol J; Koes R
Abstract
ANTHOCYANIN1 (AN1) of petunia is a transcription factor of the basic helix-loop-helix (bHLH) family that is required for the synthesis of anthocyanin pigments. Here, we show that AN1 controls additional aspects of cell differentiation: the acidification of vacuoles in petal cells, and the size and morphology of cells in the seed coat epidermis. We identified an1 alleles, formerly known as ph6, that sustain anthocyanin synthesis but not vacuolar acidification and seed coat morphogenesis. These alleles express truncated proteins lacking the C-terminal half of AN1, including the bHLH domain, at an approximately 30-fold higher level than wild-type AN1. An allelic series in which one, two, or three amino acids were inserted into the bHLH domain indicated that this domain is required for both anthocyanin synthesis and vacuolar acidification. These findings show that AN1 controls more aspects of epidermal cell differentiation than previously thought through partially separable domains.
Additional References
RELATED GEPHE
Related Haplotypes
No matches found.
COMMENTS
@TE - bHLH2 is also named anthocyanin1 (an1).
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