Abstract
The enzyme beta-1,3-glucanase (betaGlu) was found to be strongly induced by ultraviolet (UV-B; 280-320 nm) radiation in primary leaves of French bean (Phaseolus vulgaris). This was demonstrated on the level of gene transcription, protein synthesis, and enzyme activity and was due to the expression of bean class I betaGlu (betaGlu I). In contrast to other proteins of the family of pathogenesis-related proteins, the induction of betaGlu I by UV correlated with the formation of photoreversible DNA damage, i.e. pyrimidine dimer formation. In conditions that allowed photorepair of this damage, betaGlu I induction was blocked. Therefore, UV-induced DNA damage seems to constitute a primary signal in the pathway leading to the induction of the betaGlu I gene(s). The induction was a local response because in partly irradiated leaves betaGlu I was selectively found in leaf parts exposed to UV. Although short wavelength UV (lambda < 295 nm) was most efficient in betaGlu I induction, longer wavelength UV (lambda > 295 nm) as present in natural radiation was still effective. In contrast to UV induction of betaGlu I, the induction of flavonoids in bean leaves was optimally triggered by much more moderate fluences from the UV wavelength range no longer effective in betaGlu I induction. UV induction of the flavonoid pathway shows no correlation with DNA damage and thus should be mediated via a different signal transduction pathway.
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Claims 10
Claim · model-written summary
UV-B strongly induces beta-1,3-glucanase in primary French bean leaves.
- Taxon
- French bean (Phaseolus vulgaris)
Phaseolus vulgarise0 - Organ / stage
- primary leavese0
- Treatment
- ultraviolet (UV-B; 280-320 nm) radiatione0
- Gene
- beta-1,3-glucanase (betaGlu)e0
- Outcome
- beta-1,3-glucanase (betaGlu)e0
- Direction
- strongly inducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The enzyme beta-1,3-glucanase (betaGlu) was found to be strongly induced by ultraviolet (UV-B; 280-320 nm) radiation in primary leaves of French bean (Phaseolus vulgaris)”
Claim · model-written summary
UV induces betaGlu at transcription, protein synthesis and enzyme activity levels through bean betaGlu I expression.
- Taxon
- French bean (Phaseolus vulgaris)Phaseolus vulgarise1
- Gene
- bean class I betaGlu (betaGlu I)e0
- Outcome
- gene transcription, protein synthesis, and enzyme activitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This was demonstrated on the level of gene transcription, protein synthesis, and enzyme activity and was due to the expression of bean class I betaGlu (betaGlu I)”
e1“French bean (Phaseolus vulgaris)”
Claim · model-written summary
UV induction of betaGlu I correlates with pyrimidine dimer DNA damage.
- Taxon
- French bean (Phaseolus vulgaris)Phaseolus vulgarise1
- Treatment
- UVe0
- Gene
- betaGlu Ie0
- Outcome
- induction of betaGlu Ie0
- Qualifier
- pyrimidine dimer formatione0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the induction of betaGlu I by UV correlated with the formation of photoreversible DNA damage, i.e. pyrimidine dimer formation”
e1“French bean (Phaseolus vulgaris)”
Claim · model-written summary
Photorepair conditions block betaGlu I induction.
- Taxon
- French bean (Phaseolus vulgaris)Phaseolus vulgarise1
- Treatment
- conditions that allowed photorepaire0
- Gene
- betaGlu Ie0
- Outcome
- betaGlu I inductione0
- Direction
- blockede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In conditions that allowed photorepair of this damage, betaGlu I induction was blocked”
e1“French bean (Phaseolus vulgaris)”
Claim · model-written summary
UV-induced DNA damage appears to be a primary signal for betaGlu I gene induction.
- Taxon
- French bean (Phaseolus vulgaris)Phaseolus vulgarise1
- Gene
- betaGlu I gene(s)e0
- Outcome
- induction of the betaGlu I gene(s)e0
- Qualifier
- UV-induced DNA damagee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“UV-induced DNA damage seems to constitute a primary signal in the pathway leading to the induction of the betaGlu I gene(s)”
e1“French bean (Phaseolus vulgaris)”
Claim · model-written summary
betaGlu I induction is local to UV-exposed leaf parts.
- Taxon
- French bean (Phaseolus vulgaris)Phaseolus vulgarise1
- Organ / stage
- leaf partse0
- Treatment
- UVe0
- Gene
- betaGlu Ie0
- Outcome
- betaGlu I was selectively founde0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in partly irradiated leaves betaGlu I was selectively found in leaf parts exposed to UV”
e1“French bean (Phaseolus vulgaris)”
Claim · model-written summary
Short-wavelength UV below 295 nm was most efficient for betaGlu I induction.
- Taxon
- French bean (Phaseolus vulgaris)Phaseolus vulgarise1
- Treatment
- short wavelength UV (lambda < 295 nm)e0
- Gene
- betaGlu Ie0
- Outcome
- betaGlu I inductione0
- Direction
- most efficiente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“short wavelength UV (lambda < 295 nm) was most efficient in betaGlu I induction”
e1“French bean (Phaseolus vulgaris)”
Claim · model-written summary
Longer-wavelength UV above 295 nm remained effective for betaGlu I induction.
- Taxon
- French bean (Phaseolus vulgaris)Phaseolus vulgarise1
- Treatment
- longer wavelength UV (lambda > 295 nm)e0
- Outcome
- betaGlu I inductione2
- Direction
- still effectivee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“longer wavelength UV (lambda > 295 nm) as present in natural radiation was still effective”
e1“French bean (Phaseolus vulgaris)”
e2“most efficient in betaGlu I induction”
Claim · model-written summary
Moderate UV fluences at wavelengths ineffective for betaGlu I optimally induce bean flavonoids.
- Taxon
- French bean (Phaseolus vulgaris)Phaseolus vulgarise1
- Organ / stage
- bean leavese0
- Treatment
- much more moderate fluences from the UV wavelength rangee0
- Outcome
- induction of flavonoidse0
- Direction
- optimally triggerede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the induction of flavonoids in bean leaves was optimally triggered by much more moderate fluences from the UV wavelength range no longer effective in betaGlu I induction”
e1“French bean (Phaseolus vulgaris)”
Claim · model-written summary
UV flavonoid induction does not correlate with DNA damage, implying a different signaling pathway.
- Taxon
- French bean (Phaseolus vulgaris)Phaseolus vulgarise1
- Treatment
- DNA damagee0
- Outcome
- UV induction of the flavonoid pathwaye0
- Direction
- no correlatione0
- Qualifier
- a different signal transduction pathwaye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“UV induction of the flavonoid pathway shows no correlation with DNA damage and thus should be mediated via a different signal transduction pathway”
e1“French bean (Phaseolus vulgaris)”
The same questions in other papers
radiation · physiology: antioxidant enzymes · Phaseolus vulgaris (common bean)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- negative
- positive
uv · physiology: antioxidant enzymes · Phaseolus vulgaris (common bean)Positive and negative results
2 papers in the same direction as this paper · 1 in the opposite direction
- negative
- positive
- positive
uv · molecular: expression · Phaseolus vulgaris (common bean)Results agree
2 papers in the same direction as this paper
- 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.