Abstract
1. Discs cut from tobacco leaf tissue infected with tobacco mosaic virus and cultured in water contain less non-protein nitrogen than comparable uninfected discs during the time at which TMV is formed. This deficiency disappears when virus formation ceases. Discs cultured in nutrient solution form about twice as much TMV as discs cultured in water. The maximum non-protein nitrogen deficiency is comparable in magnitude to the amount of virus synthesized. 2. The largest difference between injected and uninfected tissue occurs in the ammonia content. Smaller, but significant differences in amide content are found. Infected discs cultured in water show no significant differences from control discs in free amino acid content; infected discs cultured in nutrient solution develop a small deficiency in amino acid nitrogen. 3. The general patterns of change in composition of the pool of soluble nitrogen are similar in both infected and uninfected discs. 4. The data indicate that the bulk of the nitrogen incorporated into virus protein is withdrawn from the leaf's pool of soluble nitrogen; virus is formed de novo from ammonia nitrogen and non-nitrogenous carbon sources. The effect of virus infection on host nitrogen metabolism appears to be due to the formation of virus rather than to its presence.
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Claims 12
Claim · model-written summary
Infected tobacco discs cultured in water contained less non-protein nitrogen than uninfected discs.
- Taxon
- tobacco
Nicotiana tabacume1 - Treatment
- infected with tobacco mosaic viruse1
- Interactor
- tobacco mosaic virus
Tobacco mosaic viruse1pathogen - Outcome
- non-protein nitrogene1
- Direction
- lesse1
- Qualifier
- cultured in watere1
- Comparator
- uninfected discse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Discs cut from tobacco leaf tissue infected with tobacco mosaic virus and cultured in water contain less non-protein nitrogen than comparable uninfected discs”
Claim · model-written summary
The non-protein nitrogen deficiency in infected tobacco discs disappears when virus formation ceases.
- Taxon
- tobaccoNicotiana tabacume1
- Treatment
- virus formatione2
- Outcome
- deficiencye2
- Direction
- disappearse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Discs cut from tobacco leaf tissue infected with tobacco mosaic virus and cultured in water contain less non-protein nitrogen than comparable uninfected discs”
e2“This deficiency disappears when virus formation ceases”
Claim · model-written summary
Discs cultured in nutrient solution formed about twice as much TMV as discs cultured in water.
- Taxon
- tobaccoNicotiana tabacumt0
- Treatment
- nutrient solutione3
- Interactor
- TMVTobacco mosaic viruse3pathogen
- Outcome
- TMVe3
- Direction
- twice as muche3
- Value
- about twicee3
- Comparator
- watere3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“CHANGES IN NON-PROTEIN NITROGEN METABOLISM DURING TOBACCO MOSAIC VIRUS BIOSYNTHESIS”
e3“Discs cultured in nutrient solution form about twice as much TMV as discs cultured in water”
Claim · model-written summary
The maximum non-protein nitrogen deficiency is comparable in magnitude to the amount of virus synthesized.
- Taxon
- tobaccoNicotiana tabacumt0
- Treatment
- the amount of virus synthesizede4
- Outcome
- non-protein nitrogen deficiencye4
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“CHANGES IN NON-PROTEIN NITROGEN METABOLISM DURING TOBACCO MOSAIC VIRUS BIOSYNTHESIS”
e4“The maximum non-protein nitrogen deficiency is comparable in magnitude to the amount of virus synthesized”
Claim · model-written summary
The largest difference between infected and uninfected tobacco tissue is in ammonia content.
- Taxon
- tobaccoNicotiana tabacumt0
- Treatment
- injectede5
- Outcome
- ammonia contente5
- Direction
- largest differencee5
- Comparator
- uninfected tissuee5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“CHANGES IN NON-PROTEIN NITROGEN METABOLISM DURING TOBACCO MOSAIC VIRUS BIOSYNTHESIS”
e5“The largest difference between injected and uninfected tissue occurs in the ammonia content”
Claim · model-written summary
Smaller but significant differences in amide content were found in infected tobacco tissue.
- Taxon
- tobaccoNicotiana tabacumt0
- Outcome
- amide contente6
- Qualifier
- Smallere6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“CHANGES IN NON-PROTEIN NITROGEN METABOLISM DURING TOBACCO MOSAIC VIRUS BIOSYNTHESIS”
e6“Smaller, but significant differences in amide content are found”
Claim · model-written summary
Infected discs cultured in water showed no significant difference from control discs in free amino acid content.
- Taxon
- tobaccoNicotiana tabacumt0
- Treatment
- Infected discs cultured in watere7
- Outcome
- free amino acid contente7
- Direction
- no significant differencese7
- Comparator
- control discse7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“CHANGES IN NON-PROTEIN NITROGEN METABOLISM DURING TOBACCO MOSAIC VIRUS BIOSYNTHESIS”
e7“Infected discs cultured in water show no significant differences from control discs in free amino acid content”
Claim · model-written summary
Infected discs cultured in nutrient solution developed a small deficiency in amino acid nitrogen.
- Taxon
- tobaccoNicotiana tabacumt0
- Treatment
- cultured in nutrient solutione1
- Outcome
- amino acid nitrogene1
- Direction
- deficiencye1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“CHANGES IN NON-PROTEIN NITROGEN METABOLISM DURING TOBACCO MOSAIC VIRUS BIOSYNTHESIS”
e1“infected discs cultured in nutrient solution develop a small deficiency in amino acid nitrogen”
Claim · model-written summary
Patterns of change in the soluble nitrogen pool are similar in infected and uninfected tobacco discs.
- Taxon
- tobaccoNicotiana tabacumt0
- Outcome
- general patterns of change in composition of the pool of soluble nitrogene2
- Qualifier
- similar in both infected and uninfected discse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“CHANGES IN NON-PROTEIN NITROGEN METABOLISM DURING TOBACCO MOSAIC VIRUS BIOSYNTHESIS”
e2“The general patterns of change in composition of the pool of soluble nitrogen are similar in both infected and uninfected discs”
Claim · model-written summary
The bulk of nitrogen incorporated into virus protein is withdrawn from the leaf soluble nitrogen pool.
- Taxon
- tobaccoNicotiana tabacumt0
- Outcome
- the bulk of the nitrogen incorporated into virus proteine3
- Qualifier
- withdrawn from the leaf's pool of soluble nitrogene3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“CHANGES IN NON-PROTEIN NITROGEN METABOLISM DURING TOBACCO MOSAIC VIRUS BIOSYNTHESIS”
e3“the bulk of the nitrogen incorporated into virus protein is withdrawn from the leaf's pool of soluble nitrogen”
Claim · model-written summary
Virus is formed de novo from ammonia nitrogen and non-nitrogenous carbon sources.
- Taxon
- tobaccoNicotiana tabacumt0
- Outcome
- virus is formed de novoe4
- Qualifier
- from ammonia nitrogen and non-nitrogenous carbon sourcese4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“CHANGES IN NON-PROTEIN NITROGEN METABOLISM DURING TOBACCO MOSAIC VIRUS BIOSYNTHESIS”
e4“virus is formed de novo from ammonia nitrogen and non-nitrogenous carbon sources”
Claim · model-written summary
The effect of virus infection on host nitrogen metabolism is due to virus formation rather than to its presence.
- Taxon
- tobaccoNicotiana tabacumt0
- Outcome
- effect of virus infection on host nitrogen metabolisme5
- Qualifier
- formation of virus rather than to its presencee5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“CHANGES IN NON-PROTEIN NITROGEN METABOLISM DURING TOBACCO MOSAIC VIRUS BIOSYNTHESIS”
e5“The effect of virus infection on host nitrogen metabolism appears to be due to the formation of virus rather than to its presence”
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