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Plant and Cell Physiology Advance Access published online on August 8, 2006
Plant and Cell Physiology, doi:10.1093/pcp/pcj098
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Regular Paper

Continuous Recognition of the Elicitor Signal for Several Hours Is Prerequisite for Induction of Cell Death and Prolonged Activation of Signaling Events in Tobacco BY-2 Cells

Yasuhiro Kadota 1, Shinsuke Fujii 2, Yoko Ogasawara 2, Yutaka Maeda 2, Katsumi Higashi 3, and Kazuyuki Kuchitsu 4 *

1 Department of Applied Biological Science, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan; Present address: RIKEN Plant Science Center, 1-7-22 Suehirocho, Tsurumi-ku, Yokohama 230-0045, Japan, e-mail: kadota@psc.riken.jp
2 Department of Applied Biological Science, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan
3 Genome & Drug Research Center, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan; Present address: Department of Biological Sciences, Teikyo University of Science and Technology, Uenohara, Yamanashi 409-0193, Japan
4 Department of Applied Biological Science, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan; Genome & Drug Research Center, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan

* To whom correspondence should be addressed.
Kazuyuki Kuchitsu, E-mail: kuchitsu{at}rs.noda.tus.ac.jp


  Abstract

To provide insights into the mechanisms by which receptors for pathogenic elicitors activate defense signaling, we investigated the duration of cryptogein treatment required for induction of various defense responses including programmed cell death in synchronized tobacco BY-2 cells. Transient cryptogein treatment induced only rapid and transient phase of oxidative burst and MAP kinase activation. Prolonged production of ·O2- and prolonged activation of MAP kinases, as well as accumulation of transcripts of defense-related genes and cell death required continuous recognition of cryptogein for several hours. In contrast, desensitization was gradually induced in the absence of the elicitor.

Keywords: cryptogein; elicitor; tobacco BY-2 cells; cell death; reactive oxygen species; MAP kinase.
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T. Higaki, T. Goh, T. Hayashi, N. Kutsuna, Y. Kadota, S. Hasezawa, T. Sano, and K. Kuchitsu
Elicitor-Induced Cytoskeletal Rearrangement Relates to Vacuolar Dynamics and Execution of Cell Death: In Vivo Imaging of Hypersensitive Cell Death in Tobacco BY-2 Cells
Plant Cell Physiol., October 1, 2007; 48(10): 1414 - 1425.
[Abstract] [Full Text] [PDF]


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