Role of the α subunit of heterotrimeric G-protein in probenazole-inducing defense signaling in rice |
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| Authors: | Michiaki Iwata Kenji Umemura Takeshi Teraoka Hideki Usami Yukiko Fujisawa Yukimoto Iwasaki |
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| Institution: | (1) Pharmaceutical Research Center, Meiji Seika Kaisha, Ltd., Yokohama 222-8567, Japan, JP;(2) Health and Bioscience Laboratories, Meiji Seika Kaisha Ltd., Sakado, Japan, JP;(3) Department of Bioscience, Fukui Prefectural University, Fukui, Japan, JP |
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| Abstract: | Certain cellular responses to stresses and stimuli are regulated by a G-protein-mediated signaling pathway. A rice dwarf
mutant that is defective in the α subunit of the heterotrimeric G-protein was found to be fully protected from blast fungus
by the plant activator probenazole (PBZ) despite the 1-day delay in induction of the PR-10 gene PBZ1 by PBZ. These results suggest that the signaling pathway for protection by PBZ is not via the G-protein, although G-protein
is involved in the induction of PBZ1 by PBZ.
Received: March 27, 2002 / Accepted: August 20, 2002 |
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| Keywords: | G-protein α subunit Probenazole Protection Signal transduction Rice blast |
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