Probenazole-induced accumulation of salicylic acid confers resistance to Magnaporthe grisea in adult rice plants.

Probenazole-induced accumulation of salicylic acid confers resistance to Magnaporthe grisea in adult rice plants. Research Abstract Details 

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Probenazole-induced accumulation of salicylic acid confers resistance to Magnaporthe grisea in adult rice plants. Abstract Text:

Takayoshi Iwai,Shigemi Seo,Ichiro Mitsuhara,Yuko Ohashi,

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.

Probenazole-induced accumulation of salicylic acid confers resistance to Magnaporthe grisea in adult rice plants. Publishing Authors By Initials

T Iwai,S Seo,I Mitsuhara,Y Ohashi,

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Probenazole-induced accumulation of salicylic acid confers resistance to Magnaporthe grisea in adult rice plants. Journal Published:

PUBLICATION TYPE: Research Support, Non-U.S. Gov

Journal: Plant & cell physiology

VOLUME: 48

Page Numbers: 915-24

Journal Abbreviation: Plant Cell Physiol.

ISSN: 0032-0781

DAY: 21

MONTH: 05

YEAR: 2007

Probenazole-induced accumulation of salicylic acid confers resistance to Magnaporthe grisea in adult rice plants. Information

Number of References:

LANGUAGE: eng

NlmUniqueID: 9430925

Probenazole-induced accumulation of salicylic acid confers resistance to Magnaporthe grisea in adult rice plants. Keywords Mesh Terms:

KEYWORDS: Thiazoles

MESH TERMS: pharmacology

Chemical & Substance for Abstract: Probenazole-induced accumulation of salicylic acid confers resistance to Magnaporthe grisea in adult rice plants. Information

Substance Name: Salicylic Acid

Registry Number: 69-72-7

Grant and Affiliation Information for Probenazole-induced accumulation of salicylic acid confers resistance to Magnaporthe grisea in adult rice plants.

AFFILIATION: National Institute of Agrobiological Sciences, 2-1-2 Kannondai Tsukuba, Ibaraki, 305-8602 Japan.

Country: Japan

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MEDLINETA: Plant Cell Physiol

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