Abstract
Probenazole (PBZ) is the active ingredient of Oryzemate, an agrochemical which is used for the protection of rice plants from Magnaporthe grisea (blast fungus). While PBZ was reported to function upstream of salicylic acid (SA) in Arabidopsis, little is known about the mechanism of PBZ-induced resistance in rice. The role of SA in blast fungus resistance is also unclear. The recommended application period for Oryzemate is just before the Japanese rainy season, at which time rice plants in the field have reached the 8-leaf stage with adult traits. Thus, the involvement of SA in PBZ-induced resistance was studied in compatible and incompatible blast fungus-rice interactions at two developmentally different leaf morphology stages. Pre-treatment of inoculated fourth leaves of young wild-type rice plants at the 4-leaf stage with PBZ did not influence the development of whitish expanding lesions (ELs) in the susceptible interaction without the accumulation of SA and pathogenesis-related (PR) proteins. However, PBZ pre-treatment increased accumulation of SA and PR proteins in the eighth leaves of adult plants at the 8-leaf stage, resulting in the formation of hypersensitive reaction (HR) lesions (HRLs). Exogenous SA induced resistance in adult but not young plants. SA concentrations in blast fungus-inoculated young leaves were essentially the same in compatible and incompatible interactions, suggesting that PBZ-induced resistance in rice is age-dependently regulated via SA accumulation.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 5
Claim · model-written summary
In young rice plants at the 4-leaf stage, PBZ pre-treatment did not influence development of whitish expanding lesions in the susceptible interaction with Magnaporthe grisea.
- Taxon
- rice
Oryza sativae1 - Organ / stage
- fourth leaves of young wild-type rice plants at the 4-leaf stagee2
- Treatment
- PBZe2
- Interactor
- Magnaporthe grisea
Pyricularia griseae1pathogen - Outcome
- development of whitish expanding lesionse2
- Direction
- no_changeinferrede2
- Qualifier
- in the susceptible interactione2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“used for the protection of rice plants from Magnaporthe grisea (blast fungus)”
e2“Pre-treatment of inoculated fourth leaves of young wild-type rice plants at the 4-leaf stage with PBZ did not influence the development of whitish expanding lesions (ELs) in the susceptible interaction”
Claim · model-written summary
PBZ pre-treatment of adult rice plants at the 8-leaf stage increased SA and PR protein accumulation in the eighth leaves, resulting in hypersensitive reaction lesions.
- Taxon
- riceOryza sativae1
- Organ / stage
- eighth leaves of adult plants at the 8-leaf stagee2
- Treatment
- PBZ pre-treatmente2
- Outcome
- accumulation of SA and PR proteinse2
- Direction
- increasede2
- Qualifier
- resulting in the formation of hypersensitive reaction (HR) lesionse2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“used for the protection of rice plants from Magnaporthe grisea (blast fungus)”
e2“PBZ pre-treatment increased accumulation of SA and PR proteins in the eighth leaves of adult plants at the 8-leaf stage, resulting in the formation of hypersensitive reaction (HR) lesions”
Claim · model-written summary
Exogenous SA induced resistance in adult but not in young rice plants.
- Taxon
- riceOryza sativae1
- Organ / stage
- adulte2
- Treatment
- Exogenous SAe2
- Outcome
- resistancee2
- Direction
- inducede2
- Comparator
- young plantse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“used for the protection of rice plants from Magnaporthe grisea (blast fungus)”
e2“Exogenous SA induced resistance in adult but not young plants”
Claim · model-written summary
SA concentrations in blast fungus-inoculated young leaves were essentially the same in compatible and incompatible rice-blast interactions.
- Taxon
- riceOryza sativae1
- Organ / stage
- young leavese2
- Interactor
- blast funguse2pathogen
- Outcome
- SA concentrationse2
- Qualifier
- essentially the same in compatible and incompatible interactionse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“used for the protection of rice plants from Magnaporthe grisea (blast fungus)”
e2“SA concentrations in blast fungus-inoculated young leaves were essentially the same in compatible and incompatible interactions”
Claim · model-written summary
PBZ-induced resistance in rice appears to be regulated age-dependently via SA accumulation.
- Taxon
- riceOryza sativae1
- Compound
- SAe1
- Outcome
- PBZ-induced resistancee1
- Qualifier
- age-dependently regulated via SA accumulatione1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“suggesting that PBZ-induced resistance in rice is age-dependently regulated via SA accumulation”
The same questions in other papers
paclobutrazol · molecular: metabolites · Oryza sativa (rice)Positive and negative results
2 papers in the same direction as this paper · 2 in the opposite direction
- negative
- no effect
- positive
1 paper more in this group
See all 5 papers →salicylic acid · disease · Oryza sativa (rice)Positive and negative results
25 papers in the same direction as this paper · 5 in the opposite direction
- positive
- negative
- no effect
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.