Abstract
Abscisic acid (ABA) is an essential component in the wound signalling cascade. Increased levels of endogenous ABA were observed after wounding and shown to be a requisite for wound-induced expression of the proteinase inhibitor II genes. We have taken advantage of the dominant character of the Arabidopsis abi1-1 mutation, to investigate whether ABl1 has a function in ABA signalling in response to wounding. Transgenic tomato plants carrying copies of either the wild-type ABI1 or the mutant abi1-1 alleles were obtained and assayed for wound-induction of the pin2 or LAP genes. While normal levels of gene induction were observed in the transgenic ABI1 plants, the abi1-1 transformants displayed a severe wilty phenotype and reduced seed dormancy. Expression of the abi1-1 dominant mutation blocked accumulation of the drought-induced TAS14 and LE25 mRNAs in response to ABA, as well as ABA- and wound-induced expression of the defense-associated pin2 and LAP transcripts. MeJA-induction of the pin2 and LAP mRNAs, on the contrary, was not affected in the abi1-1 transformants. These results indicate that abi1-1 inhibits wound-induced expression of the pin2 and LAP transcripts by blocking ABA-induction of these genes. This implicates ABI1 in wound-signalling and suggests that a common early ABA signalling pathway may function in the responses to wounding and water stress.
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Claims 8
Claim · model-written summary
Wild-type ABI1 transgenics had normal wound-induced gene induction.
- Taxon
- tomato
Solanum lycopersicumt0 - Gene
- ABI1e0
- Outcome
- normal levels of gene inductione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“normal levels of gene induction were observed in the transgenic ABI1 plants”
t0“tomato”
Claim · model-written summary
abi1-1 transformants displayed a severe wilty phenotype.
- Taxon
- tomatoSolanum lycopersicumt0
- Material
- abi1-1 transformantse0
- Outcome
- severe wilty phenotypee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the abi1-1 transformants displayed a severe wilty phenotype and reduced seed dormancy.”
t0“tomato”
Claim · model-written summary
abi1-1 transformants had reduced seed dormancy.
- Taxon
- tomatoSolanum lycopersicumt0
- Material
- abi1-1 transformantse0
- Outcome
- seed dormancye0
- Direction
- reducede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the abi1-1 transformants displayed a severe wilty phenotype and reduced seed dormancy.”
t0“tomato”
Claim · model-written summary
abi1-1 expression blocked ABA-induced accumulation of TAS14 and LE25 mRNAs.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- Expression of the abi1-1 dominant mutatione0
- Outcome
- accumulation of the drought-induced TAS14 and LE25 mRNAse0
- Direction
- blockede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Expression of the abi1-1 dominant mutation blocked accumulation of the drought-induced TAS14 and LE25 mRNAs in response to ABA”
t0“tomato”
Claim · model-written summary
abi1-1 blocked ABA- and wound-induced pin2 and LAP expression.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- Expression of the abi1-1 dominant mutatione0
- Outcome
- ABA- and wound-induced expression of the defense-associated pin2 and LAP transcriptse0
- Direction
- blockede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Expression of the abi1-1 dominant mutation blocked accumulation of the drought-induced TAS14 and LE25 mRNAs in response to ABA, as well as ABA- and wound-induced expression of the defense-associated pin2 and LAP transcripts.”
t0“tomato”
Claim · model-written summary
MeJA induction of pin2 and LAP mRNAs was unaffected in abi1-1 transformants.
- Taxon
- tomatoSolanum lycopersicumt0
- Material
- abi1-1 transformantse0
- Treatment
- MeJAe0
- Outcome
- pin2 and LAP mRNAse0
- Direction
- not affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“MeJA-induction of the pin2 and LAP mRNAs, on the contrary, was not affected in the abi1-1 transformants.”
t0“tomato”
Claim · model-written summary
abi1-1 inhibits wound-induced pin2 and LAP expression by blocking ABA induction.
- Taxon
- tomatoSolanum lycopersicumt0
- Gene
- abi1-1e0
- Outcome
- wound-induced expression of the pin2 and LAP transcriptse0
- Qualifier
- blocking ABA-induction of these genese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“abi1-1 inhibits wound-induced expression of the pin2 and LAP transcripts by blocking ABA-induction of these genes.”
t0“tomato”
Claim · model-written summary
A common early ABA signaling pathway may function in wounding and water-stress responses.
- Taxon
- tomatoSolanum lycopersicumt0
- Gene
- ABI1e0
- Outcome
- responses to wounding and water stresse0
- Qualifier
- a common early ABA signalling pathwaye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This implicates ABI1 in wound-signalling and suggests that a common early ABA signalling pathway may function in the responses to wounding and water stress.”
t0“tomato”
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