What are the genomic consequences for plastids in a mixotrophic orchid (<i>Epipactis helleborine</i>)?
Bibliographic record
Abstract
The chloroplast (plastid) controls carbon uptake, so its DNA sequence and function are highly conserved throughout the land plants. But, for those that have alternative carbon supplies, the plastid genome is susceptible to mutations in the photosynthetic genes and overall size reduction. Fully mycoheterotrophic plants receive organic carbon from their fungal partner, do not photosynthesize, and also do not exhibit green coloration (or produce substantial quantities of chlorophyll). Epipactis helleborine (L.) Crantz exhibits all trophic modes from autotrophy to full mycoheterotrophy. Albinism is a stable condition in individuals of this species and does not prevent them from producing flowers and fruit. Here we assemble and compare the plastid genome of green and albino individuals. Our results show that there is still strong selective pressure in the plastid genome. Therefore, the few punctual differences among them, to our knowledge, do not affect any normal photosynthetic capability in the albino plant. These findings suggest that mutations or other genetically controlled processes in other genomes, or environmental conditions, are responsible for the phenotype.
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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) | 0.002 | 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".