A wheat NAC transcription factor, TaNAC018-7D, regulates seed dormancy and germination by binding to the GA biosynthesis gene TaGA7ox-A1
Bibliographic record
Abstract
Pre-harvest sprouting (PHS) reduces grain yield and quality and poses a serious threat to global wheat production. Seed dormancy and germination are closely related to PHS resistance. However, the intricate regulatory processes governing seed dormancy and germination remain largely unknown. Here, we reported that a NAC transcription factor gene ( TaNAC018–7D ) is highly expressed in weak-dormancy wheat cultivar Jing 411 compared with a strong-dormancy landrace Hongmangchun 21 during seed germination. Germination tests revealed that TaNAC018–7D negatively regulates seed dormancy and positively mediates germination in transgenic lines of Arabidopsis and rice, and wheat mutants induced by ethyl methane sulfonate in the Jing 411 background. Subcellular localization analysis indicated that TaNAC018–7D is located in the nucleus and cytoplasm. Physiological, biochemical, and molecular experiments indicated that TaNAC018–7D interacts with the promoter of the GA biosynthesis gene TaGA7ox-A1 and activates its expression, thereby shortening seed dormancy and promoting germination. In summary, this study provides a new target gene for improving wheat PHS resistance, and improves the understanding of the complex regulatory network of PHS resistance. • TaNAC018–7D was differentially expressed in wheat varieties with different dormancy. • TaNAC018–7D accumulates primarily in the nucleus with minor accumulation in the cytoplasm. • Overexpression of TaNAC018–7D reduced the dormancy of Arabidopsis and rice. • The mutant TaNAC018–7D increased the dormancy of wheat. • TaNAC018–7D could bind and activate the expression of TaGA7ox-A1.
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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".