<i>Chrysomyxa</i> rust: morphology and ultrastructure of D-haustoria, uredinia, and telia
Bibliographic record
Abstract
An electron- and light-microscopic study revealed that D-haustoria of Chrysomyxa rhododendri (DC.) De Bary and Chrysomyxa pirolata Winter were pedicellate and had a more or less tuber-shaped haustorial body. The haustorial necks were wrapped by a fold of the extrahaustorial membrane (velopedunculate haustorial type). The aecioid uredinia of Chrysomyxa rhododendri and Chrysomyxa empetri (Pers.) Schröter were covered by a one-layered peridium of the pucciniastreous type. In Chrysomyxa pirolata, young uredinia were covered by one to three layers of sterile fungal cells. In all investigated species, urediniospore mother cells were formed blastically by proliferating basal cells. Subsequent cell divisions of the urediniospore mother cells led to the formation of urediniospores and intercalary cells. In Chrysomyxa rhododendri, the intercalary cells had a pronounced proximal thickening of the radial wall. In Chrysomyxa pirolata andChrysomyxa empetri, the wall was uniformly thickened. Telial morphology of Chrysomyxa rhododendri and Chrysomyxa pirolata was very similar. In Chrysomyxa rhododendri, the probasidia formed true chains without intercalary cells, and they are probably of thallic origin. During maturation they partly separated at their septa by dissolution of the primary wall of the septa between the probasidia. No sterile elements were present in the telia. The occurrence of velopedunculate D-haustoria and a uredinial peridium of the pucciniastreous type confirm the systematic position of Chrysomyxa close to pucciniastreous rusts, Cronartium, and Coleosporium within Melampsoraceae.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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 | 0.000 |
| 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) | 0.000 | 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".