First Report of <i>Alfalfa mosaic virus</i> in <i>Physostegia virginiana</i>
Bibliographic record
Abstract
Physostegia virginiana Benth. (false dragon head) is a perennial plant from the family Lamiaceae cultivated as an ornamental in gardens and for cut-flower production. In 2000, stunting of plants and yellow-to-brown ringspots on leaves were observed in cut-flower production in the Alpes Maritimes Department (southeast France). These symptoms greatly decreased the commercial value of the stems. The disease was attributed to Alfalfa mosaic virus (AMV) because extracts of infected plant tissues revealed typical bacilliform particles by electron microscopy, produced symptoms typical of AMV after inoculation of a range of previously described test plants (1), and reacted positively in enzyme-linked immunosorbent assays (ELISA) with antibodies raised to a tomato strain of AMV (from G. Marchoux, INRA, France). After isolation from single local lesions on Vigna unguiculata, the AMV isolate was multiplied in cv. Xanthinc tobacco, where it induced local and systemic ringspot symptoms. Infected Xanthinc plants served as sources of inocula for subsequent mechanical- and aphid (Myzus persicae)-transmission tests to healthy seedlings of P. virginiana (seeds from the botanic garden of Nancy, France; 36 plants for each inoculation procedure). Chlorotic and necrotic local lesions were observed in 25% of mechanically inoculated plants. Three months after inoculation, uninoculated leaves of all mechanically inoculated plants and 30.5% of aphid-inoculated plants tested positive for AMV based on ELISA. During the first year after inoculation, less than 10% of infected plants showed typical systemic symptoms. This proportion reached 40% during the second year. Recently, we observed similar symptoms in P. virginiana plants cultivated in public gardens in Intercourse (Pennsylvania), Toronto (Ontario, Canada) and Montreal (Quebec, Canada). Using ELISA, AMV was detected in symptomatic plants from these three additional locations. Reference: (1) L. Cardin and B. Moury. Plant Dis. 84:594, 2000.
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 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 | 0.001 | 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 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".