Abstract
The fungal elicitor cryptogein triggers a light-dependent hypersensitive response in tobacco (Nicotiana tabacum). To assess the effect of light on this nonhost resistance in more detail, we studied various aspects of the response under dark and light conditions using the tobacco-cryptogein experimental system. Here, we show that light drastically alters the plant's transcriptional response to cryptogein, notably by dampening the induction of genes involved in multiple processes, such as ethylene biosynthesis, secondary metabolism, and glutathione turnover. Furthermore, chlorophyll fluorescence measurements demonstrated that quantum yield and functioning of the light-harvesting antennae decreased simultaneously, indicating that photoinhibition underlies the observed decreased photosynthesis and that photooxidative damage might be involved in the establishment of the altered response. Analysis of the isomer distribution of hydroxy fatty acids illustrated that, in the light, lipid peroxidation was predominantly due to the production of singlet oxygen. Differences in (reduced) glutathione concentrations and the rapid development of symptoms in the light when cryptogein was coinfiltrated with glutathione biosynthesis inhibitors suggest that glutathione might become a limiting factor during the cryptogein-induced hypersensitive response in the dark and that this response might be modified by an increased antioxidant availability in the light.
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Claims 9
Claim · model-written summary
In tobacco, light drastically alters the plant's transcriptional response to cryptogein, notably by dampening the induction of genes involved in multiple processes, such as ethylene biosynthesis, secondary metabolism, and glutathione turnover.
- Taxon
- tobacco (Nicotiana tabacum)
Nicotiana tabacumt0 - Treatment
- cryptogeine0
- Outcome
- induction of genes involved in multiple processese0
- Direction
- dampeninge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“light drastically alters the plant's transcriptional response to cryptogein, notably by dampening the induction of genes involved in multiple processes, such as ethylene biosynthesis, secondary metabolism, and glutathione turnover”
t0“tobacco (Nicotiana tabacum)”
Claim · model-written summary
In tobacco, quantum yield and functioning of the light-harvesting antennae decreased simultaneously.
- Taxon
- tobacco (Nicotiana tabacum)Nicotiana tabacumt0
- Outcome
- quantum yield and functioning of the light-harvesting antennaee0
- Direction
- decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“quantum yield and functioning of the light-harvesting antennae decreased simultaneously”
t0“tobacco (Nicotiana tabacum)”
Claim · model-written summary
In tobacco, photoinhibition underlies the observed decreased photosynthesis.
- Taxon
- tobacco (Nicotiana tabacum)Nicotiana tabacumt0
- Outcome
- decreased photosynthesise0
- Direction
- decreasede0
- Qualifier
- photoinhibition underlies the observed decreased photosynthesise0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“photoinhibition underlies the observed decreased photosynthesis”
t0“tobacco (Nicotiana tabacum)”
Claim · model-written summary
In tobacco, photooxidative damage might be involved in the establishment of the altered response.
- Taxon
- tobacco (Nicotiana tabacum)Nicotiana tabacumt0
- Outcome
- altered responsee0
- Qualifier
- photooxidative damage might be involved in the establishment of the altered responsee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“photooxidative damage might be involved in the establishment of the altered response”
t0“tobacco (Nicotiana tabacum)”
Claim · model-written summary
In tobacco, in the light, lipid peroxidation was predominantly due to the production of singlet oxygen.
- Taxon
- tobacco (Nicotiana tabacum)Nicotiana tabacumt0
- Outcome
- lipid peroxidatione0
- Qualifier
- in the light, lipid peroxidation was predominantly due to the production of singlet oxygene0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in the light, lipid peroxidation was predominantly due to the production of singlet oxygen”
t0“tobacco (Nicotiana tabacum)”
Claim · model-written summary
In tobacco, Differences in (reduced) glutathione concentrations.
- Taxon
- tobacco (Nicotiana tabacum)Nicotiana tabacumt0
- Outcome
- (reduced) glutathione concentrationse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Differences in (reduced) glutathione concentrations”
t0“tobacco (Nicotiana tabacum)”
Claim · model-written summary
In tobacco, the rapid development of symptoms in the light when cryptogein was coinfiltrated with glutathione biosynthesis inhibitors.
- Taxon
- tobacco (Nicotiana tabacum)Nicotiana tabacumt0
- Treatment
- cryptogein was coinfiltrated with glutathione biosynthesis inhibitorse0
- Outcome
- development of symptomse0
- Direction
- rapide0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the rapid development of symptoms in the light when cryptogein was coinfiltrated with glutathione biosynthesis inhibitors”
t0“tobacco (Nicotiana tabacum)”
Claim · model-written summary
In tobacco, glutathione might become a limiting factor during the cryptogein-induced hypersensitive response in the dark.
- Taxon
- tobacco (Nicotiana tabacum)Nicotiana tabacumt0
- Outcome
- cryptogein-induced hypersensitive responsee0
- Qualifier
- glutathione might become a limiting factor during the cryptogein-induced hypersensitive response in the darke0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“glutathione might become a limiting factor during the cryptogein-induced hypersensitive response in the dark”
t0“tobacco (Nicotiana tabacum)”
Claim · model-written summary
In tobacco, this response might be modified by an increased antioxidant availability in the light.
- Taxon
- tobacco (Nicotiana tabacum)Nicotiana tabacumt0
- Outcome
- responsee0
- Qualifier
- this response might be modified by an increased antioxidant availability in the lighte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“this response might be modified by an increased antioxidant availability in the light”
t0“tobacco (Nicotiana tabacum)”
The same questions in other papers
glutathione · disease · Nicotiana tabacum (tobacco)Positive and negative results
2 in the opposite direction
- positive
- 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.