A PRp27 gene of Nicotiana benthamiana contributes to resistance to Pseudomonas syringae pv. tabaci but not to Colletotrichum destructivum or Colletotrichum orbiculare
Bibliographic record
Abstract
NbPRp27 from Nicotiana benthamiana Domin. is highly similar to NtPRp27, which is a secreted protein from Nicotiana tabacum L. belonging to pathogen-inducible genes comprising the PR17 family of pathogenesis-related proteins. A collection of related genes from plants in several plant families showed that their deduced amino acid sequences clustered according to plant family. Expression of NbPRp27 was not detectable in healthy leaves or stems but was expressed at high levels in roots. Expression was induced by wounding, BTH, ethylene, methyl jasmonate, ABA and NAA, but not by drought, heat or cold stress. Expression was induced by infection with the hemibiotrophic pathogens, Colletotrichum destructivum, Colletotrichum orbiculare and Pseudomonas syringae pv. tabaci. For infections with the Colletotrichum species, expression increased more slowly during biotrophy than necrotrophy, but the reverse was true for P. syringae pv. tabaci. Virus-induced silencing of NbPRp27 did not affect the lesion number produced by the Colletotrichum species but did reduce basal resistance to P. syringae pv. tabaci permitting higher bacterial populations. Based on sequence similarities, PRp27 proteins have been hypothesised to have protease activity and may contribute to resistance by exhibiting direct antimicrobial activity in the apoplast, releasing of antimicrobial compounds from the plant matrix or releasing elicitors from pathogens to induce resistance.
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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 | 0.001 |
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".