Shoot Responses of Six Lythraceae Species to Flooding
Bibliographic record
Abstract
Abstract: The large family Lythraceae has several genera and species that show tolerance to flooding; one species, Lythrum salicaria (purple loosestrife), is considered invasive in North American wetlands. It is not clear, however, which characteristic(s) contribute to the invasive nature of L. salicaria, but those that contribute to improved flood tolerance may be responsible. This study examined the response of the shoot system of several members of the Lythraceae, three Lythrum species (L. salicaria, L. hyssopifolia, L. alatum), Decodon verticillatum, Pleurophora anomala and Heimia myrticifolia, to flooding to determine if these species differ in their response in comparison to L. salicaria. All species, except L. hyssopifolia, responded to flooding by increasing total plant height. All species, except H. myrticifolia, formed a phellem of significantly wider diameter at the stem base of flooded plants compared to controls. This phellem consisted of alternating bands of small, isodiametric cells and radially elongated cells separated by large air lacunae forming a very specialized aerenchyma. The small cells had Casparian band‐like wall modifications and occasionally displayed modifications that included all cell wall surfaces. The development of extensive aerenchymatous phellem in flooded plants may increase the air space continuum from shoot to root in shoots that have undergone secondary growth. Given that these species displayed similar responses to flooding, the purported invasiveness of L. salicaria cannot be attributed to presence of any of the characteristics studied.
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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 | 0.000 |
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".