Abstract
Tomato (Solanum lycopersicum) is a globally important crop, typically requiring pollination for fruit set. Seedless fruit production-fruit set without pollination (parthenocarpy)-is a desirable trait for horticulture, but its molecular mechanisms are not fully understood. Research on tomato fruit set has largely focused on phytohormones such as auxin and gibberellins (GAs), while the role of jasmonic acid (JA) remains unclear. Here, we identified a novel seedless mutant, Sldad1 (Solanum lycopersicum defective in anther dehiscence1) with a mutation in JA biosynthesis induced by ethyl methanesulfonate mutagenesis in the 'Micro-Tom' background. The wild type SlDAD1 was found to be specifically transcribed in the stamen filament, particularly 2 d before anthesis, with JA levels correlating to its transcript abundance, as visualized by imaging mass spectrometry. Notably, JA also accumulated in the ovary and ovule before anthesis. The Sldad1 mutant produced seedless fruit without any manual pollination or emasculation and seeded fruit via self-pollination. The mutant showed increased cell expansion, elevated GA levels, and higher transcripts of SlGA20ox3, while treatment to inhibit GA biosynthesis suppressed Sldad1-induced fruit set. Overall, our findings suggest that JA synthesized in the filament accumulates in the ovule before anthesis, thereby preventing tomato fruit set, at least in part, through the modulation of GA metabolism.
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Claims 11
Claim · model-written summary
A seedless JA biosynthesis mutant, Sldad1, was identified.
- Taxon
- tomato
Solanum lycopersicumt0 - Material
- Sldad1e0
- Gene
- Sldad1e0
- Outcome
- novel seedless mutante0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“we identified a novel seedless mutant, Sldad1 (Solanum lycopersicum defective in anther dehiscence1) with a mutation in JA biosynthesis induced by ethyl methanesulfonate mutagenesis in the 'Micro-Tom' background”
t0“tomato”
Claim · model-written summary
SlDAD1 transcription was concentrated in stamen filaments two days before anthesis.
Verbatim
e0“The wild type SlDAD1 was found to be specifically transcribed in the stamen filament, particularly 2 d before anthesis”
Claim · model-written summary
JA levels correlated with SlDAD1 transcript abundance.
Not reportedDirection
Verbatim
e0“JA levels correlating to its transcript abundance, as visualized by imaging mass spectrometry”
e1“The wild type SlDAD1 was found to be specifically transcribed in the stamen filament”
Claim · model-written summary
JA accumulated in ovary and ovule before anthesis.
- Taxon
- tomatoSolanum lycopersicumt0
- Organ / stage
- ovary and ovulee0
- Outcome
- JAe0
- Direction
- accumulatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“JA also accumulated in the ovary and ovule before anthesis”
t0“tomato”
Claim · model-written summary
Sldad1 produced seedless fruit without manual pollination or emasculation.
- Taxon
- tomatoSolanum lycopersicumt0
- Material
- Sldad1 mutante0
- Outcome
- seedless fruite0
- Qualifier
- without any manual pollination or emasculatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The Sldad1 mutant produced seedless fruit without any manual pollination or emasculation”
t0“tomato”
Claim · model-written summary
Sldad1 produced seeded fruit through self-pollination.
- Taxon
- tomatoSolanum lycopersicumt0
- Material
- Sldad1 mutante0
- Outcome
- seeded fruit via self-pollinatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The Sldad1 mutant produced seedless fruit without any manual pollination or emasculation and seeded fruit via self-pollination”
t0“tomato”
Claim · model-written summary
The mutant had increased cell expansion.
- Taxon
- tomatoSolanum lycopersicumt0
- Material
- mutante0
- Outcome
- cell expansione0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The mutant showed increased cell expansion, elevated GA levels, and higher transcripts of SlGA20ox3”
t0“tomato”
Claim · model-written summary
The mutant had elevated GA levels.
- Taxon
- tomatoSolanum lycopersicumt0
- Material
- mutante0
- Outcome
- GA levelse0
- Direction
- elevatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The mutant showed increased cell expansion, elevated GA levels, and higher transcripts of SlGA20ox3”
t0“tomato”
Claim · model-written summary
The mutant had higher SlGA20ox3 transcript levels.
- Taxon
- tomatoSolanum lycopersicumt0
- Material
- mutante0
- Gene
- SlGA20ox3e0
- Outcome
- transcripts of SlGA20ox3e0
- Direction
- highere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The mutant showed increased cell expansion, elevated GA levels, and higher transcripts of SlGA20ox3”
t0“tomato”
Claim · model-written summary
GA biosynthesis inhibition suppressed Sldad1 fruit set.
- Taxon
- tomatoSolanum lycopersicumt0
- Material
- Sldad1e0
- Treatment
- treatment to inhibit GA biosynthesise0
- Outcome
- fruit sete0
- Direction
- suppressede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“treatment to inhibit GA biosynthesis suppressed Sldad1-induced fruit set”
t0“tomato”
Claim · model-written summary
The authors propose that filament-derived JA accumulates in ovules and prevents fruit set partly via GA metabolism.
- Taxon
- tomatoSolanum lycopersicume0
- Organ / stage
- filamente0
- Compound
- JAe0
- Outcome
- fruit sete0
- Direction
- preventinge0
- Qualifier
- at least in parte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“JA synthesized in the filament accumulates in the ovule before anthesis, thereby preventing tomato fruit set, at least in part, through the modulation of GA metabolism”
The same questions in other papers
Gibberellic acid · yield · Solanum lycopersicum (tomato)Results differ
4 papers in the same direction as this paper · 51 in the opposite direction
- positive
- positive
- positive
52 papers more in this group
See all 56 papers →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.