A leaf-expressed <i>TERMINAL FLOWER1</i> ortholog from coffee with alternate splice forms alters flowering time and inflorescence branching in <i>Arabidopsis</i>
Bibliographic record
Abstract
ABSTRACT Perennial, polycarpic species, such as Coffea sp L. (coffee), exhibit asynchronous flowering while maintaining concomitant vegetative growth. This growth dichotomy is associated directly with fruit development and maturation time. To identify molecular components that underlie asynchronous flowering, we isolated phosphatidylethanolamine binding protein (PEBP) homologs expressed in coffee and identified a gene with high similarity to Arabidopsis TERMINAL FLOWER1-like . In Arabidopsis, interaction of TFL1 (AtTFL1) with bZIP transcription factor floral regulator FD (AtFD) forms a floral repressor complex that maintains inflorescence meristems in an indeterminate state. Unlike AtTFL1 , which is expressed only in the shoot apical meristem, CaTFL1 transcript was detected exclusively in coffee leaves. Moreover, this transcript retained an intron, which was not reported for AtTFL1 . CaTFL1 was characterized through heterologous expression in Arabidopsis and protein interaction analysis. Ectopic overexpression of CaTFL1 in transgenic Arabidopsis plants caused extreme late flowering or prevented flowering. However, the most severe floral repressive activity occurred in transgenic plants that spliced out the extra intron from CaTFL1 . Yeast two hybrid assay revealed that CaTFL1 protein encoded by the spliced mRNA interacts with AtFD, as well as Arabidopsis 14-3-3 protein. These findings suggest that CaTFL1 acts as a leaf-expressed floral repressor, whose activity is controlled by alternate splicing, and may contribute to asynchronous flowering in coffee.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| 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) | 0.001 | 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 source (direct Gemma or distilled Codex), 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".