Abstract
The plant hormone ethylene plays vital roles in plant development, including pollen tube (PT) growth. Many studies have used the ethylene precursor, 1-aminocyclopropane-1-carboxylic acid (ACC), as a tool to trigger ethylene signaling. Several studies have suggested that ACC can act as a signal molecule independently of ethylene, inducing responses that are distinct from those induced by ethylene. In this study, we confirmed that ethylene receptor function is essential for promoting PT growth in tomato, but interestingly, we discovered that ACC itself can act as a signal that also promotes PT growth. Exogenous ACC stimulated PT growth even when ethylene perception was inhibited either chemically by treating with 1-methylcyclopropene (1-MCP) or genetically by using the ethylene-insensitive Never Ripe (NR) mutant. Treatment with aminoethoxyvinylglycine, which reduces endogenous ACC levels, led to a reduction of PT growth, even in the NR mutants. Furthermore, GUS activity driven by an EIN3 Binding Site promoter (EBS:GUS transgene) was triggered by ACC in the presence of 1-MCP. Taken together, these results suggest that ACC signaling can bypass the ethylene receptor step to stimulate PT growth and EBS driven gene expression.
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Claims 5
Claim · model-written summary
Exogenous ACC stimulated pollen tube growth in tomato even when ethylene perception was inhibited.
- Taxon
- tomato
Solanum lycopersicumt0 - Treatment
- Exogenous ACCe0
- Outcome
- PT growthe0
- Direction
- stimulatede0
- Qualifier
- even when ethylene perception was inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“stimulates tomato pollen tube growth”
e0“Exogenous ACC stimulated PT growth even when ethylene perception was inhibited either chemically by treating with 1-methylcyclopropene (1-MCP) or genetically by using the ethylene-insensitive Never Ripe (NR) mutant”
Claim · model-written summary
Treatment with aminoethoxyvinylglycine reduced pollen tube growth, including in NR mutants.
- Taxon
- tomatoSolanum lycopersicumt0
- Material
- NR mutantse1
- Treatment
- aminoethoxyvinylglycinee1
- Outcome
- PT growthe1
- Direction
- reductione1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“stimulates tomato pollen tube growth”
e1“Treatment with aminoethoxyvinylglycine, which reduces endogenous ACC levels, led to a reduction of PT growth, even in the NR mutants”
Claim · model-written summary
Ethylene receptor function is essential for promoting pollen tube growth in tomato.
- Taxon
- tomatoSolanum lycopersicume2
- Outcome
- PT growthe2
- Qualifier
- ethylene receptor function is essentiale2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“we confirmed that ethylene receptor function is essential for promoting PT growth in tomato”
Claim · model-written summary
ACC in the presence of 1-MCP triggered GUS activity driven by the EBS promoter.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- ACCe3
- Gene
- EBS:GUS transgenee3
- Outcome
- GUS activitye3
- Direction
- triggerede3
- Qualifier
- in the presence of 1-MCPe3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“stimulates tomato pollen tube growth”
e3“GUS activity driven by an EIN3 Binding Site promoter (EBS:GUS transgene) was triggered by ACC in the presence of 1-MCP”
Claim · model-written summary
ACC signaling can bypass the ethylene receptor step to stimulate pollen tube growth and EBS-driven gene expression.
- Taxon
- tomatoSolanum lycopersicumt0
- Compound
- ACCe4
- Outcome
- PT growthe4
- Qualifier
- ACC signaling can bypass the ethylene receptor stepe4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“stimulates tomato pollen tube growth”
e4“these results suggest that ACC signaling can bypass the ethylene receptor step to stimulate PT growth and EBS driven gene expression”
The same questions in other papers
1-aminocyclopropanecarboxylic acid · growth · Solanum lycopersicum (tomato)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- positive
- no effect
1-aminocyclopropanecarboxylic acid · molecular: expression · Solanum lycopersicum (tomato)Results agree
2 papers in the same direction as this paper
- positive
- positive
Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.