Abstract
Two loci producing white flowers have been identified in the common morning glory, Ipomoea purpurea. At the W locus, ww individuals produce flowers with white corollas and pigmented rays, while at the A locus, aa individuals produce flowers with white corollas, and a*a* individuals produce variegated corollas. To determine whether these two loci correspond to regulatory or structural genes, six structural genes required for anthocyanin synthesis were cloned and their expression pattern was examined in genotypes with white and pigmented flowers. In ww flower buds, expression of all six structural genes was greatly reduced or eliminated, indicating that the W locus encodes a regulatory gene. By contrast, genotype at the A locus did not affect expression of any of the structural genes, suggesting that the A locus may encode one of those structural genes. An evolutionary comparison of structural gene regulation in maize, snapdragons, petunias, and morning glories suggests that regulatory control of the anthocyanin pathway is evolutionarily labile.
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Claims 9
Claim · model-written summary
Two loci producing white flowers were identified in the common morning glory.
- Taxon
- common morning glory
Ipomoea purpureae0 - Outcome
- Two loci producing white flowerse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Two loci producing white flowers have been identified in the common morning glory”
Claim · model-written summary
ww individuals of the common morning glory produce flowers with white corollas and pigmented rays.
- Taxon
- common morning gloryIpomoea purpureat0
- Material
- wwe0
- Outcome
- flowers with white corollas and pigmented rayse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ww individuals produce flowers with white corollas and pigmented rays”
t0“common morning glory”
Claim · model-written summary
aa individuals of the common morning glory produce flowers with white corollas.
- Taxon
- common morning gloryIpomoea purpureat0
- Material
- aae0
- Outcome
- flowers with white corollase0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“aa individuals produce flowers with white corollas”
t0“common morning glory”
Claim · model-written summary
a*a* individuals of the common morning glory produce variegated corollas.
- Taxon
- common morning gloryIpomoea purpureat0
- Material
- a*a*e0
- Outcome
- variegated corollase0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a*a* individuals produce variegated corollas”
t0“common morning glory”
Claim · model-written summary
In ww flower buds, expression of all six anthocyanin structural genes was greatly reduced or eliminated.
- Taxon
- common morning gloryIpomoea purpureat0
- Material
- wwe0
- Organ / stage
- flower budse0
- Gene
- six structural genese0
- Outcome
- expression of all six structural genese0
- Direction
- greatly reduced or eliminatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In ww flower buds, expression of all six structural genes was greatly reduced or eliminated”
t0“common morning glory”
Claim · model-written summary
The authors interpret the reduced expression of structural genes in ww buds as indicating that the W locus encodes a regulatory gene.
- Taxon
- common morning gloryIpomoea purpureat0
- Gene
- W locuse0
- Outcome
- encodes a regulatory genee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“indicating that the W locus encodes a regulatory gene”
t0“common morning glory”
Claim · model-written summary
Genotype at the A locus did not affect expression of any of the structural genes.
- Taxon
- common morning gloryIpomoea purpureat0
- Gene
- A locuse0
- Outcome
- expression of any of the structural genese0
- Direction
- did not affecte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“genotype at the A locus did not affect expression of any of the structural genes”
t0“common morning glory”
Claim · model-written summary
The authors suggest that the A locus may encode one of the structural genes.
- Taxon
- common morning gloryIpomoea purpureat0
- Gene
- A locuse0
- Outcome
- encode one of those structural genese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“suggesting that the A locus may encode one of those structural genes”
t0“common morning glory”
Claim · model-written summary
An evolutionary comparison of maize, snapdragons, petunias and morning glories suggests that regulatory control of the anthocyanin pathway is evolutionarily labile.
Verbatim
e0“An evolutionary comparison of structural gene regulation in maize, snapdragons, petunias, and morning glories suggests that regulatory control of the anthocyanin pathway is evolutionarily labile”