Abstract
Endogenous signal molecules such as jasmonic acid (JA) and salicylic acid (SA) play an important role in induced resistance against pathogen infection and insect herbivory. In rice seedlings, JA is an effective inducer of systemic acquired resistance (SAR) against infection of blast fungus (Pyricularia grisea). To gain further insights into JA-mediated defense signaling pathways, we isolated and characterized a pathogen- and JA-induced rice gene (JAmyb) that encodes a Myb transcription factor. The JAmyb gene was induced within 1 day after fungal infection in resistant and susceptible interactions prior to lesion formation. Unlike most defense-related genes that are activated faster and stronger in resistant interactions, JAmyb induction by blast fungus is much higher in susceptible interactions, accompanied by large lesions and extensive tissue damage. Significant induction of JAmyb also was observed during cell death and lesion formation in certain lesion mimic mutants. Interestingly, JAmyb was activated rapidly by JA or wounding, independent of de novo protein synthesis, but not by other endogenous signal molecules such as SA and abscisic acid or SAR inducers such as benzothiadiazole and probenazole. We used SA-deficient transgenic plants to further demonstrate that depletion of SA in rice did not abolish but rather enhanced blast-induced JAmyb expression. These results suggest that JAmyb is related closely to host cell death and is involved in the JA-mediated, SA-independent signaling pathways in rice.
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Claims 13
Claim · model-written summary
A pathogen- and JA-induced rice Myb gene was isolated and characterized.
- Taxon
- rice
Oryza sativae0 - Gene
- JAmybe0
- Outcome
- Myb transcription factore0
- Value
- a pathogen- and JA-induced rice genee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“we isolated and characterized a pathogen- and JA-induced rice gene (JAmyb) that encodes a Myb transcription factor.”
Claim · model-written summary
JAmyb was induced within a day after fungal infection before lesions formed.
- Interactor
- fungale0pathogen
- Gene
- JAmybe0
- Outcome
- JAmyb genee0
- Direction
- inducede0
- Value
- within 1 daye0
- Qualifier
- prior to lesion formatione0
Not reportedTaxon
Verbatim
e0“The JAmyb gene was induced within 1 day after fungal infection in resistant and susceptible interactions prior to lesion formation.”
t0“Rice”
Claim · model-written summary
Blast fungus induced JAmyb more strongly in susceptible interactions.
- Interactor
- blast funguse0pathogen
- Gene
- JAmybe0
- Outcome
- JAmyb inductione0
- Direction
- much highere0
- Comparator
- susceptible interactionse0
Not reportedTaxon
Verbatim
e0“JAmyb induction by blast fungus is much higher in susceptible interactions, accompanied by large lesions and extensive tissue damage.”
t0“Rice”
Claim · model-written summary
Higher JAmyb induction accompanied large lesions and extensive tissue damage.
Not reportedTaxonDirection
Verbatim
e0“JAmyb induction by blast fungus is much higher in susceptible interactions, accompanied by large lesions and extensive tissue damage.”
t0“Rice”
Claim · model-written summary
JAmyb was significantly induced during cell death and lesions in lesion mimic mutants.
- Material
- lesion mimic mutantse0
- Gene
- JAmybe0
- Outcome
- induction of JAmybe0
- Direction
- inductione0
- Qualifier
- during cell death and lesion formatione0
Not reportedTaxon
Verbatim
e0“Significant induction of JAmyb also was observed during cell death and lesion formation in certain lesion mimic mutants.”
t0“Rice”
Claim · model-written summary
JA rapidly activated JAmyb without new protein synthesis.
- Treatment
- JAe0
- Gene
- JAmybe0
- Outcome
- JAmybe0
- Direction
- activatede0
- Qualifier
- independent of de novo protein synthesise0
Not reportedTaxonComparator
Verbatim
e0“JAmyb was activated rapidly by JA or wounding, independent of de novo protein synthesis,”
t0“Rice”
Claim · model-written summary
Wounding rapidly activated JAmyb without new protein synthesis.
- Treatment
- woundinge0
- Gene
- JAmybe0
- Outcome
- JAmybe0
- Direction
- activatede0
- Qualifier
- independent of de novo protein synthesise0
Not reportedTaxonComparator
Verbatim
e0“JAmyb was activated rapidly by JA or wounding, independent of de novo protein synthesis,”
t0“Rice”
Claim · model-written summary
SA did not activate JAmyb.
- Treatment
- SAe0
Not reportedTaxonGeneComparatorOutcomeDirection
Verbatim
e0“but not by other endogenous signal molecules such as SA and abscisic acid or SAR inducers such as benzothiadiazole and probenazole.”
t0“Rice”
Claim · model-written summary
Abscisic acid did not activate JAmyb.
- Treatment
- abscisic acide0
Not reportedTaxonGeneComparatorOutcomeDirection
Verbatim
e0“but not by other endogenous signal molecules such as SA and abscisic acid or SAR inducers such as benzothiadiazole and probenazole.”
t0“Rice”
Claim · model-written summary
Benzothiadiazole did not activate JAmyb.
- Treatment
- benzothiadiazolee0
Not reportedTaxonGeneComparatorOutcomeDirection
Verbatim
e0“but not by other endogenous signal molecules such as SA and abscisic acid or SAR inducers such as benzothiadiazole and probenazole.”
t0“Rice”
Claim · model-written summary
Probenazole did not activate JAmyb.
- Treatment
- probenazolee0
Not reportedTaxonGeneComparatorOutcomeDirection
Verbatim
e0“but not by other endogenous signal molecules such as SA and abscisic acid or SAR inducers such as benzothiadiazole and probenazole.”
t0“Rice”
Claim · model-written summary
SA depletion enhanced rather than abolished blast-induced JAmyb expression.
- Taxon
- riceOryza sativae0
- Treatment
- depletion of SAe0
- Interactor
- blaste0pathogen
- Outcome
- blast-induced JAmyb expressione0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“depletion of SA in rice did not abolish but rather enhanced blast-induced JAmyb expression.”
Claim · model-written summary
The authors link JAmyb to host cell death and JA-mediated SA-independent signaling.
- Taxon
- riceOryza sativae0
- Gene
- JAmybe0
- Outcome
- host cell deathe0
- Qualifier
- JA-mediated, SA-independent signaling pathwayse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“These results suggest that JAmyb is related closely to host cell death and is involved in the JA-mediated, SA-independent signaling pathways in rice.”
The same questions in other papers
salicylic acid · molecular: expression · Oryza sativa (rice)Positive and negative results
27 papers in the same direction as this paper · 3 in the opposite direction
- no effect
- positive
- positive
27 papers more in this group
See all 31 papers →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.