Abstract
Leaves of bright tobacco NC 95 infected with tobacco vein mottling virus (TVMV) and tobacco mosaic virus (TMV) were fractionated into subcellular fractions for protein quantitation and enzyme assay. Both viruses increased soluble proteins in the nuclear, chloroplastic and ribosomal fractions, whereas TMV infection lowered cytoplasmic protein content. Leaves infected with TVMV significantly increased total soluble proteins. Virus infection enhanced peroxidase activity in the cytoplasm but decreased activity in the chloroplastic and mitochondrial fractions. Polyphenol-oxidase concentrated in the chloroplast and its activity were not altered by virus infection. Ribosomal fraction was rich in protease in both virus-infected leaves. In the chloroplasts, protease increased in activity in the TMV-infected leaves but maintained a level as low as the control in leaves showing TVMV symptom. The accumulation of soluble proteins in the TVMV-infected leaves is possibly, in part, attributed to a low concentration of protease.
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Claims 11
Claim · model-written summary
Both viruses increased soluble proteins in nuclear, chloroplastic and ribosomal fractions.
- Taxon
- TOBACCO
Nicotiana tabacumt0 - Organ / stage
- LEAFt0
- Treatment
- Both virusese0
- Outcome
- soluble proteins in the nuclear, chloroplastic and ribosomal fractionse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both viruses increased soluble proteins in the nuclear, chloroplastic and ribosomal fractions, whereas TMV infection lowered cytoplasmic protein content.”
t0“TOBACCO LEAF”
Claim · model-written summary
TMV infection lowered cytoplasmic protein content.
- Taxon
- TOBACCONicotiana tabacumt0
- Treatment
- TMV infectione0
- Interactor
- TMV
Tobacco mosaic viruse0pathogen - Outcome
- cytoplasmic protein contente0
- Direction
- lowerede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“TMV infection lowered cytoplasmic protein content.”
t0“TOBACCO LEAF”
Claim · model-written summary
TVMV infected leaves had significantly increased total soluble proteins.
- Taxon
- TOBACCONicotiana tabacumt0
- Treatment
- infected with TVMVe0
- Outcome
- total soluble proteinse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leaves infected with TVMV significantly increased total soluble proteins.”
t0“TOBACCO LEAF”
Claim · model-written summary
Virus infection enhanced cytoplasmic peroxidase activity.
- Taxon
- TOBACCONicotiana tabacumt0
- Treatment
- Virus infectione0
- Gene
- peroxidasee0
- Outcome
- peroxidase activity in the cytoplasme0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Virus infection enhanced peroxidase activity in the cytoplasm but decreased activity in the chloroplastic and mitochondrial fractions.”
t0“TOBACCO LEAF”
Claim · model-written summary
Virus infection decreased peroxidase activity in chloroplast and mitochondrial fractions.
- Taxon
- TOBACCONicotiana tabacumt0
- Treatment
- Virus infectione0
- Gene
- peroxidasee0
- Outcome
- activity in the chloroplastic and mitochondrial fractionse0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Virus infection enhanced peroxidase activity in the cytoplasm but decreased activity in the chloroplastic and mitochondrial fractions.”
t0“TOBACCO LEAF”
Claim · model-written summary
Polyphenol-oxidase was concentrated in chloroplasts.
- Taxon
- TOBACCONicotiana tabacumt0
- Gene
- Polyphenol-oxidasee0
- Outcome
- Polyphenol-oxidase concentrated in the chloroplaste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Polyphenol-oxidase concentrated in the chloroplast and its activity were not altered by virus infection.”
t0“TOBACCO LEAF”
Claim · model-written summary
Virus infection did not alter polyphenol-oxidase activity.
- Taxon
- TOBACCONicotiana tabacumt0
- Treatment
- virus infectione0
- Outcome
- its activitye0
- Direction
- not alterede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Polyphenol-oxidase concentrated in the chloroplast and its activity were not altered by virus infection.”
t0“TOBACCO LEAF”
Claim · model-written summary
The ribosomal fraction was rich in protease in virus-infected leaves.
- Taxon
- TOBACCONicotiana tabacumt0
- Gene
- proteasee0
- Outcome
- rich in proteasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ribosomal fraction was rich in protease in both virus-infected leaves.”
t0“TOBACCO LEAF”
Claim · model-written summary
TMV infection increased chloroplast protease activity.
- Taxon
- TOBACCONicotiana tabacumt0
- Organ / stage
- chloroplastse0
- Treatment
- TMV-infectede0
- Outcome
- proteasee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the chloroplasts, protease increased in activity in the TMV-infected leaves but maintained a level as low as the control in leaves showing TVMV symptom.”
t0“TOBACCO LEAF”
Claim · model-written summary
TVMV-symptomatic leaves retained low chloroplast protease activity comparable with control.
- Taxon
- TOBACCONicotiana tabacumt0
- Organ / stage
- chloroplastse0
- Treatment
- TVMVe0
- Outcome
- proteasee0
- Direction
- maintainede0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the chloroplasts, protease increased in activity in the TMV-infected leaves but maintained a level as low as the control in leaves showing TVMV symptom.”
t0“TOBACCO LEAF”
Claim · model-written summary
The authors suggest low protease concentration partly explains soluble protein accumulation in TVMV-infected leaves.
- Taxon
- TOBACCONicotiana tabacumt0
- Gene
- proteasee0
- Outcome
- accumulation of soluble proteinse0
- Qualifier
- possibly, in parte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The accumulation of soluble proteins in the TVMV-infected leaves is possibly, in part, attributed to a low concentration of protease.”
t0“TOBACCO LEAF”
The same questions in other papers
infection · Tobacco mosaic virus · Nicotiana tabacum (tobacco)Positive and negative results
28 papers in the same direction as this paper · 33 in the opposite direction
- negative
- positive
- positive
58 papers more in this group
See all 62 papers →infection · physiology: osmolytes · Nicotiana tabacum (tobacco)Results agree
1 paper in the same direction as this paper
- negative
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.