The influence of plant-host sex on the plant-parasitic nematode community in dioceous plants
Bibliographic record
Abstract
Corema is a dioceous genus of the Ericaceae family, which includes two species: C. album, endemic to the Atlantic coast of the Iberian peninsula; and C. conradii, endemic of the Northeastern coast of North America. Reproduction implies different costs depending on sex, as flowering is metabolically more expensive for male plants and fruit production only to female plants. Hence, nutrient allocation and resource needs differ between male and female plants, potentially altering their ecology and performance, as suggested from above ground studies. Using a below-ground approach, we focused on the interactions of both species of Corema with plant-parasitic nematodes (PPN) and possible sex-related differences regarding those interactions. Soil and root samples were collected from the rhizosphere of C. album (Portugal) and C. conradii (Nova Scotia, Canada) during the flowering season. Nematodes were extracted from the samples, observed, quantified and classified into trophic groups; PPN were identified to genus level using simple diagnostic keys. The PPN communities associated with each species differed in composition, however, data on the abundance and distribution of PPN genera suggest host sex-related differences on the PPN communities for both plant species. Agricultural pests, Meloidogyne and Pratylenchus showed different trends in C. album, the first exhibiting higher numbers in females and the latter in males. Also Helicotylenchus and Tylencholaimus both presented more abundantly in C. conradii males. Our results suggest that plant sex is an important factor affecting the below-ground ecology of dioceous plants and their relationships with the soil biota.
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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 | 0.001 | 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".