Function of the rice gp91^<phox> homologs OsrbohA and OsrbohE genes in ROS-dependent plant immune responses

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概要

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• Reactive oxygen species (ROS) are proposed to function as diffusible signaling molecules in plant immune response. Rice respiratory burst oxidase homologs (Osrboh genes) are proposed to play a role in ROS generation. We examined a role in rice immune responses of four Osrboh homologs, OsrbohA, OsrbohB, OsrbohD, and OsrbohE. OsrbohA and OsrbohD transcripts were induced after inoculation with an incompatible N1141 strain of Acidovorax avenae, whereas OsrbohaB and OsrbohE mRNA levels did not obviously change even after inoculation with the incompatible strain. We examined the function of the Osrboh genes in ROS generation and in the plant immune response using RNAi-based knockdown in rice cells. OsrbohA and OsrbohE knockdown lines showed that rapid H2O2 generation is caused by OsrbohA, whereas OsrbohE is involved in late H2O2 production during the immune response. Hypersensitive cell death was decreased only in the OsrbohA knockdown line. We further demonstrated that among immune related genes, the induction of EL2 and LOX genes is controlled by ROS generated by OsrbohE, whereas expression of Cht-1 gene is regulated by both OsrbohA and OsrbohE. These results indicate that the ROS molecules generated by OsrbohA and OsrbohE regulate different signaling pathways in the plant immune response.

• 日本植物細胞分子生物学会の論文
• 2005-06-01

著者

• ISOGAI Akira

  Graduate School of Agricultural and Life Sciences, The University of Tokyo

• Takayama Seiji

  Graduate School of Biological Sciences, Nara Institute of Science and Technology

• IWANO Megumi

  Graduate School of Biological Sciences, Nara Institute of Science and Technology

• Che Fang-sik

  Graduate School Of Biological Sciences Nara Institute Of Science And Technology

• Takayama S

  Graduate School Of Biological Sciences Nara Inst. Of Sci. And Technol.

• Takayama Seiji

  Graduate School Of Biological Sciences Nara Institute Of Science And Technology

• Che Fang-sik

  Graduate School Of Biological Sciences Nara Inst. For Sci. And Technol.

• TAKAI Ryota

  Graduate School of Biological Sciences, Nara Institute of Science and Technology

• YOSHIE Yoshiaki

  Graduate School of Biological Sciences, Nara Institute of Science and Technology (NAIST)

• GOTO Kazunori

  Graduate School of Biological Sciences, Nara Institute of Science and Technology (NAIST)

• CHE Fang-Sik

  Department of Environmental Biology, Faculty of Bio-Science, Nagahama Institute of Bio-Science and T

• Iwano Megumi

  Graduate School Of Biological Sciences Nara Institute Of Science And Technology (naist)

• Iwano Megumi

  Bioscience Naist

• Iwano Megumi

  Graduate School Of Biological Science Nara Advanced Institute Of Science And Technology

• Isogai A

  Graduate School Of Biological Sciences Nara Inst. Of Sci. And Technol.

• Che Fang-sik

  Department Of Agricultural Chemistry The University Of Tokyo

• Isogai Akira

  Graduate School Of Agricultural And Life Sciences The University Of Tokyo

• Goto Kazunori

  Graduate School Of Biological Sciences Nara Institute Of Science And Technology (naist)

• Yoshie Yoshiaki

  Graduate School Of Biological Sciences Nara Institute Of Science And Technology (naist)

• Iwano M

  Graduate School Of Biological Sciences Nara Institute Of Science And Technology (naist)

• Takai Ryota

  Graduate School Of Bio-science Nagahama Institute Of Bio-science And Technology

• Takai Ryota

  Graduate School Of Biological Sciences Nara Institute Of Science And Technology

• Isogai Akira

  Department Of Applied Biological Chemistry The University Of Tokyo

• Isogai Akira

  Graduate School Of Agricultural And Life Science The University Of Tokyo

• Goto Kazunori

  Graduate School Of Agriculture Hokkaido University

• Yoshie Yoshiaki

  Graduate School Of Bio-science Nagahama Institute Of Bio-science And Technology

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