Abstract
The Viviparous-1 (Vp1) gene is required for expression of the C1 regulatory gene of the anthocyanin pathway in the developing maize seed. We show that VP1 overexpression and the hormone, abscisic acid (ABA), activate a reporter gene driven by the C1 promoter in maize protoplasts. Cis-acting sequences essential for these responses were localized. Mutation of a conserved sequence in the C1 promoter abolishes both ABA regulation and VP1 trans-activation. An adjacent 5-bp deletion blocks ABA regulation but not VP1 trans-activation. The latter mutant reconstructs the promoter of c1-p, an allele that is expressed during seed germination but not during seed maturation. We suggest that VP1 activates C1 specifically during maturation by interacting with one or more ABA-regulated transcription factors.
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Claims 6
Claim · model-written summary
VP1 overexpression activates a C1 promoter reporter in maize protoplasts.
- Treatment
- VP1 overexpressione0
- Gene
- VP1e0
- Outcome
- a reporter gene driven by the C1 promotere0
- Direction
- activatee0
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“VP1 overexpression and the hormone, abscisic acid (ABA), activate a reporter gene driven by the C1 promoter in maize protoplasts”
Claim · model-written summary
ABA activates a C1 promoter reporter in maize protoplasts.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the hormone, abscisic acid (ABA), activate a reporter gene driven by the C1 promoter in maize protoplasts”
Claim · model-written summary
Mutation of a conserved C1 promoter sequence abolishes ABA regulation and VP1 trans-activation.
- Treatment
- Mutation of a conserved sequence in the C1 promotere0
- Outcome
- ABA regulation and VP1 trans-activatione0
- Direction
- abolishese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Mutation of a conserved sequence in the C1 promoter abolishes both ABA regulation and VP1 trans-activation”
t0“maize”
Claim · model-written summary
An adjacent 5-bp deletion blocks ABA regulation.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“An adjacent 5-bp deletion blocks ABA regulation but not VP1 trans-activation”
t0“maize”
Claim · model-written summary
An adjacent 5-bp deletion does not block VP1 trans-activation.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“An adjacent 5-bp deletion blocks ABA regulation but not VP1 trans-activation”
t0“maize”
Claim · model-written summary
The deletion reconstructs the c1-p promoter, whose allele is expressed during germination but not maturation.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The latter mutant reconstructs the promoter of c1-p, an allele that is expressed during seed germination but not during seed maturation”
t0“maize”
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