Abstract
S ummary When leaves of Nicotiana tabacum L. var. Xanthi were infected with tobacco etch virus, local lesion formation was accompanied by an increased rate of respiration which coincided with an increase in their adenosine triphosphate concentration. Stimulation of respiration by 2.4 dinitrophenol decreased to a low value with increasing lesion density. A combination of increased adenosine triphosphate concentration and greater adenosine triphosphate turnover may contribute towards the increased respiration of the local lesion host. Adenine greatly increased the adenosine triphosphate concentration of healthy leaves but not the respiration rate. With the local lesion leaf, where adenosine triphosphate concentration was increased by virus infection, adenosine triphosphate concentration was unaffected by adenine. Treatment of leaves with adenine increases resistance to virus infection, while healthy tissue surrounding virus‐induced local lesions is also resistant to reinfection; both give increased adenosine triphosphate concentration suggesting that this is an important factor in resistance to virus infection. Increased adenosine triphosphate concentration in the leaf may result in the production of additional host ribonucleic acid which then occupies receptor sites usually available to virus ribonucleic acid.
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Claims 11
Claim · model-written summary
Virus lesion formation accompanied increased leaf respiration.
- Taxon
- Nicotiana tabacum
Nicotiana tabacume0 - Interactor
- tobacco etch virus
Tobacco etch viruse0pathogen - Outcome
- rate of respiratione0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When leaves of Nicotiana tabacum L. var. Xanthi were infected with tobacco etch virus, local lesion formation was accompanied by an increased rate of respiration which coincided with an increase in their adenosine triphosphate concentration.”
Claim · model-written summary
Virus infection coincided with increased leaf ATP concentration.
- Taxon
- Nicotiana tabacumNicotiana tabacume0
- Interactor
- tobacco etch virusTobacco etch viruse0pathogen
- Outcome
- adenosine triphosphate concentratione0
- Direction
- increasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When leaves of Nicotiana tabacum L. var. Xanthi were infected with tobacco etch virus, local lesion formation was accompanied by an increased rate of respiration which coincided with an increase in their adenosine triphosphate concentration.”
Claim · model-written summary
Dinitrophenol stimulation of respiration declined with lesion density.
- Taxon
- Nicotiana tabacumNicotiana tabacume1
- Treatment
- 2.4 dinitrophenole0
- Outcome
- Stimulation of respiratione0
- Direction
- decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Stimulation of respiration by 2.4 dinitrophenol decreased to a low value with increasing lesion density.”
e1“When leaves of Nicotiana tabacum L. var. Xanthi were infected with tobacco etch virus”
Claim · model-written summary
Adenine greatly increased ATP concentration in healthy leaves.
- Taxon
- Nicotiana tabacumNicotiana tabacume1
- Treatment
- Adeninee0
- Outcome
- adenosine triphosphate concentratione0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Adenine greatly increased the adenosine triphosphate concentration of healthy leaves but not the respiration rate.”
e1“When leaves of Nicotiana tabacum L. var. Xanthi were infected with tobacco etch virus”
Claim · model-written summary
Adenine did not increase respiration in healthy leaves.
- Taxon
- Nicotiana tabacumNicotiana tabacume1
- Treatment
- Adeninee0
- Outcome
- respiration ratee0
- Direction
- note0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Adenine greatly increased the adenosine triphosphate concentration of healthy leaves but not the respiration rate.”
e1“When leaves of Nicotiana tabacum L. var. Xanthi were infected with tobacco etch virus”
Claim · model-written summary
Adenine left ATP concentration unaffected in local lesion leaves.
- Taxon
- Nicotiana tabacumNicotiana tabacume1
- Treatment
- adeninee0
- Outcome
- adenosine triphosphate concentratione0
- Direction
- unaffectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With the local lesion leaf, where adenosine triphosphate concentration was increased by virus infection, adenosine triphosphate concentration was unaffected by adenine.”
e1“When leaves of Nicotiana tabacum L. var. Xanthi were infected with tobacco etch virus”
Claim · model-written summary
Adenine treatment increased leaf resistance to virus infection.
- Taxon
- Nicotiana tabacumNicotiana tabacume1
- Treatment
- adeninee0
- Outcome
- resistance to virus infectione0
- Direction
- increasese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Treatment of leaves with adenine increases resistance to virus infection, while healthy tissue surrounding virus‐induced local lesions is also resistant to reinfection; both give increased adenosine triphosphate concentration suggesting that this is an important factor in resistance to virus infection.”
e1“When leaves of Nicotiana tabacum L. var. Xanthi were infected with tobacco etch virus”
Claim · model-written summary
Healthy tissue surrounding lesions resisted reinfection.
- Taxon
- Nicotiana tabacumNicotiana tabacume1
- Outcome
- resistant to reinfectione0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“healthy tissue surrounding virus‐induced local lesions is also resistant to reinfection”
e1“When leaves of Nicotiana tabacum L. var. Xanthi were infected with tobacco etch virus”
Claim · model-written summary
Adenine-treated and lesion-surrounding tissues had increased ATP.
- Taxon
- Nicotiana tabacumNicotiana tabacume1
- Outcome
- adenosine triphosphate concentratione0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“both give increased adenosine triphosphate concentration suggesting that this is an important factor in resistance to virus infection.”
e1“When leaves of Nicotiana tabacum L. var. Xanthi were infected with tobacco etch virus”
Claim · model-written summary
ATP concentration was suggested to contribute to virus resistance.
- Taxon
- Nicotiana tabacumNicotiana tabacume1
- Outcome
- resistance to virus infectione0
- Qualifier
- increased adenosine triphosphate concentratione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“both give increased adenosine triphosphate concentration suggesting that this is an important factor in resistance to virus infection.”
e1“When leaves of Nicotiana tabacum L. var. Xanthi were infected with tobacco etch virus”
Claim · model-written summary
Increased ATP may promote host RNA that occupies viral RNA receptor sites.
- Taxon
- Nicotiana tabacumNicotiana tabacume1
- Outcome
- production of additional host ribonucleic acide0
- Qualifier
- Increased adenosine triphosphate concentratione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increased adenosine triphosphate concentration in the leaf may result in the production of additional host ribonucleic acid which then occupies receptor sites usually available to virus ribonucleic acid.”
e1“When leaves of Nicotiana tabacum L. var. Xanthi were infected with tobacco etch virus”
The same questions in other papers
adenine · molecular: metabolites · Nicotiana tabacum (tobacco)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- negative
- 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.