Evolutionary changes in leaf and root traits predates changes in mycorrhizal associations in seed plants.
Bibliographic record
Abstract
Changes in root morphological traits of seed plants has been typically associated with transitions from the ancestral arbuscular mycorrhizal (AM) to the alternative ectomycorrhizal (ECM) or non-mycorrhizal (NM) associations. However, changes in root morphology also coincide with changes in leaf physiology and growth habit during the diversification of Angiosperms. To explore the evolution of root systems and their role in the diversification in seed plants, we assembled a 600+ species database to reconstruct historical changes in root, leaf and growth form in seed plants. Our findings show important shifts in diameter, specific root length and tissue density as Angiosperms diversified. For most plants, changes in morphology occurred before the acquisition of novel mycorrhizal affiliations, but along with changes in leaf hydraulics and growth form. These findings suggest that adaptation in root systems was crucial during plant diversification and defined important ecological divergences among phylogenetic clades.
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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 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| 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 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".