Abstract
To understand the coordinated functions of the different classes of defense-related genes expressed in plant disease resistance, the expression patterns of pathogenesis related (PR) protein genes and genes involved in antioxidation and the production of secondary metabolites were examined. The expression patterns of the respective defense-related genes were monitored following TMV infection or salicylic acid treatment. Northern blot analyses showed that PR genes such as PR-1, beta-1,3-glucanase and chitinase were strongly induced in tobacco leaves upon TMV infection or salicylic acid treatment. 3-Hydroxy-3-methylglutaryl CoA reductase (HMGR) and phenylalanine ammonialyase (PAL), involved in isoprenoid and phenylpropanoid biosynthesis, respectively, were mildly induced at the late stage of normal hypersensitive response (HR) or after salicylic acid treatment when compared with the PR-gene expressions. However, in acute HR, they were strongly expressed at the early stage. Interestingly, the expression of the antioxidative genes, anionic peroxidase and ascorbate peroxidase, were inversely expressed following TMV infection and salicylic acid treatment. Differential expression of 3 groups of genes involved in plant defense responses are discussed in relation to different signal transduction pathways.
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Claims 6
Claim · model-written summary
TMV infection strongly induced PR-1, beta-1,3-glucanase and chitinase in tobacco leaves.
- Taxon
- tobacco
Nicotiana tabacume0 - Organ / stage
- leavese0
- Treatment
- TMV infectione0
- Interactor
- TMV
Tobacco mosaic viruse0pathogen - Gene
- PR-1, beta-1,3-glucanase and chitinasee0
- Outcome
- PR genese0
- Direction
- strongly inducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“PR genes such as PR-1, beta-1,3-glucanase and chitinase were strongly induced in tobacco leaves upon TMV infection or salicylic acid treatment.”
t0“Tobacco”
Claim · model-written summary
Salicylic acid strongly induced PR-1, beta-1,3-glucanase and chitinase in tobacco leaves.
- Taxon
- tobaccoNicotiana tabacume0
- Organ / stage
- leavese0
- Treatment
- salicylic acid treatmente0
- Gene
- PR-1, beta-1,3-glucanase and chitinasee0
- Outcome
- PR genese0
- Direction
- strongly inducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“PR genes such as PR-1, beta-1,3-glucanase and chitinase were strongly induced in tobacco leaves upon TMV infection or salicylic acid treatment.”
Claim · model-written summary
HMGR and PAL were mildly induced late in normal HR relative to PR genes.
- Taxon
- TobaccoNicotiana tabacumt0
- Organ / stage
- late stagee0
- Treatment
- normal hypersensitive response (HR)e0
- Gene
- HMGR) and phenylalanine ammonialyase (PALe0
- Outcome
- HMGR) and phenylalanine ammonialyase (PALe0
- Direction
- mildly inducede0
- Comparator
- PR-gene expressionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“3-Hydroxy-3-methylglutaryl CoA reductase (HMGR) and phenylalanine ammonialyase (PAL), involved in isoprenoid and phenylpropanoid biosynthesis, respectively, were mildly induced at the late stage of normal hypersensitive response (HR) or after salicylic acid treatment when compared with the PR-gene expressions.”
t0“Tobacco”
Claim · model-written summary
HMGR and PAL were mildly induced after salicylic acid relative to PR genes.
- Taxon
- TobaccoNicotiana tabacumt0
- Treatment
- salicylic acid treatmente0
- Gene
- HMGR) and phenylalanine ammonialyase (PALe0
- Outcome
- HMGR) and phenylalanine ammonialyase (PALe0
- Direction
- mildly inducede0
- Comparator
- PR-gene expressionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“3-Hydroxy-3-methylglutaryl CoA reductase (HMGR) and phenylalanine ammonialyase (PAL), involved in isoprenoid and phenylpropanoid biosynthesis, respectively, were mildly induced at the late stage of normal hypersensitive response (HR) or after salicylic acid treatment when compared with the PR-gene expressions.”
t0“Tobacco”
Claim · model-written summary
HMGR and PAL were strongly expressed early during acute HR.
- Taxon
- TobaccoNicotiana tabacumt0
- Organ / stage
- early stagee0
- Gene
- HMGR) and phenylalanine ammonialyase (PALe1
- Outcome
- strongly expressede0
- Direction
- strongly expressede0
- Qualifier
- acute HRe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“However, in acute HR, they were strongly expressed at the early stage.”
e1“3-Hydroxy-3-methylglutaryl CoA reductase (HMGR) and phenylalanine ammonialyase (PAL)”
t0“Tobacco”
Claim · model-written summary
Anionic peroxidase and ascorbate peroxidase had inverse expression responses to TMV infection and salicylic acid treatment.
- Taxon
- TobaccoNicotiana tabacumt0
- Treatment
- TMV infection and salicylic acid treatmente0
- Interactor
- TMVTobacco mosaic viruse0pathogen
- Gene
- anionic peroxidase and ascorbate peroxidasee0
- Outcome
- expression of the antioxidative genese0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the expression of the antioxidative genes, anionic peroxidase and ascorbate peroxidase, were inversely expressed following TMV infection and salicylic acid treatment.”
t0“Tobacco”
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