Spatiotemporal localization of jasmonate in the regulation of fruit set in tomato
Bibliographic record
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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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".