Abstract
Plant viruses move systemically from one leaf to another via phloem. However, the viral functions needed for systemic movement are not fully elucidated. An experimental system was designed to study the effects of low temperature on the vascular transport of the tobacco mosaic tobamovirus (TMV). Vascular transport of TMV from lower inoculated leaves to upper non-inoculated leaves via a stem segment kept at low temperature (4 degrees C) was not affected. On the other hand, several experiments were performed on tobacco leaves to demonstrate that virus replication did not occur at the same temperature. The data suggest that replication of TMV in the phloem of wild-type tobacco plants is not necessary for the vascular transport of TMV, and that the virus moves with photoassimilates as suggested previously.
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Claims 4
Claim · model-written summary
At 4 degrees C, TMV vascular transport to upper leaves was unaffected.
- Taxon
- tobacco
Nicotiana tabacumt0 - Treatment
- low temperature (4 degrees C)e0
- Interactor
- TMV
Tobacco mosaic viruse0pathogen - Outcome
- Vascular transport of TMVe0
- Direction
- not affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Vascular transport of TMV from lower inoculated leaves to upper non-inoculated leaves via a stem segment kept at low temperature (4 degrees C) was not affected.”
t0“tobacco”
Claim · model-written summary
TMV replication did not occur in tobacco leaves at the same temperature.
- Taxon
- tobaccoNicotiana tabacume0
- Interactor
- viruse0pathogen
- Outcome
- virus replication did not occure0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“several experiments were performed on tobacco leaves to demonstrate that virus replication did not occur at the same temperature.”
Claim · model-written summary
TMV replication in tobacco phloem is unnecessary for its vascular transport.
- Taxon
- tobaccoNicotiana tabacume0
- Interactor
- TMVTobacco mosaic viruse0pathogen
- Outcome
- vascular transport of TMVe0
- Qualifier
- replication of TMV in the phloeme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“replication of TMV in the phloem of wild-type tobacco plants is not necessary for the vascular transport of TMV”
Claim · model-written summary
TMV may move with photoassimilates.
- Taxon
- tobaccoNicotiana tabacumt0
- Interactor
- viruse0pathogen
- Outcome
- virus moves with photoassimilatese0
- Qualifier
- with photoassimilatese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the virus moves with photoassimilates as suggested previously.”
t0“tobacco”
The same questions in other papers
cold · Tobacco mosaic virus · Nicotiana tabacum (tobacco)Positive and negative results
1 in the opposite direction
- positive
Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.