Skip Navigation

This Article
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Alert me to new issues of the journal
Right arrow Add to My Personal Archive
Right arrow Download to citation manager
Right arrowRequest Permissions
Google Scholar
Right arrow Articles by Sano, H.
Right arrow Articles by Ohashi, Y.
Right arrow Search for Related Content
PubMed
Right arrow Articles by Sano, H.
Right arrow Articles by Ohashi, Y.
Agricola
Right arrow Articles by Sano, H.
Right arrow Articles by Ohashi, Y.
Social Bookmarking
Add to CiteULike   Add to Connotea   Add to Del.icio.us  
What's this?

Plant and Cell Physiology, 1996, Vol. 37, No. 6 762-769
© 1996

Regulation by Cytokinins of Endogenous Levels of Jasmonic and Salicylic Acids in Mechanically Wounded Tobacco Plants

Hiroshi Sano1,4, Shigemi Seo2, Nozomu Koizumi2, Tomoya Niki2, Hajime Iwamura3 and Yuko Ohashi2

1Nara Institute of Science and Technology Ikoma, Nara, 630-01 Japan
2National Institute of Agrobiological Resources Tsukuba, Ibaraki, 305 Japan
3Faculty of Agriculture Kyoto University, Kyoto, 606 Japan

4To whom correpondence should be addressed.

Plants respond differentially to wounding and pathogens using distinct signaling pathways, so that wound signals are transmitted to jasmonic acid (JA) which induces basic pathogenesis-related (PR) proteins, whereas pathogenic signals cause, in addition to JA, accumulation of salicylic acid (SA) which stimulates production of acidic PR proteins. Transgenic tobacco plants expressing a gene for a small GTP binding protein respond abnormally to mechanical wounding to produce SA and consequently acidic PR proteins, suggesting that wound signals cross with pathogen signaling pathways [Sano et al. (1994) Proc. Natl. Acad. Sci. USA 91: 10556]. This unusual signal crossing is associated with a highly sensitive wound-response of transgenic plants which, upon wounding, produce JA at least eighteen hours earlier than wild-type plants. When wildtype plants are wounded in the presence of the synthetic cytokinin, benzylaminopurine, production of JA begins six hours earlier than in untreated samples, and also SA begins to accumulate. The cytokinin antagonist, 2-chloro-4-cyclohexylamino-6-ethylamino-s-triazine, erases these effects. Because transgenic plants constitutively produce four-to six-fold higher amounts of endogenous cytokinins than wild-type plants, it is concluded that cytokinins are indispensable for control of endogenous levels of SA and JA.

(Received April 23, 1996; Accepted June 10, 1996)
Add to CiteULike CiteULike   Add to Connotea Connotea   Add to Del.icio.us Del.icio.us    What's this?


This article has been cited by other articles:


Home page
 Plant Cell PhysiolHome page
Y. Ishiga, A. Funato, T. Tachiki, K. Toyoda, T. Shiraishi, T. Yamada, and Y. Ichinose
Expression of the 12-Oxophytodienoic Acid 10,11-Reductase Gene in the Compatible Interaction between Pea and Fungal Pathogen
Plant Cell Physiol., October 15, 2002; 43(10): 1210 - 1220.
[Abstract] [Full Text] [PDF]

Home page
 Plant Physiol.Home page
S.-K. Yen, M.-C. Chung, P.-C. Chen, and H. E. Yen
Environmental and Developmental Regulation of the Wound-Induced Cell Wall Protein WI12 in the Halophyte Ice Plant
Plant Physiology, October 1, 2001; 127(2): 517 - 528.
[Abstract] [Full Text] [PDF]

Home page
 Plant Physiol.Home page
J. R. Koch, R. A. Creelman, S. M. Eshita, M. Seskar, J. E. Mullet, and K. R. Davis
Ozone Sensitivity in Hybrid Poplar Correlates with Insensitivity to Both Salicylic Acid and Jasmonic Acid. The Role of Programmed Cell Death in Lesion Formation
Plant Physiology, June 1, 2000; 123(2): 487 - 496.
[Abstract] [Full Text]

Home page
 Plant Physiol.Home page
Y. Ikeda, N. Koizumi, T. Kusano, and H. Sano
Sucrose and Cytokinin Modulation of WPK4, a Gene Encoding a SNF1-Related Protein Kinase from Wheat
Plant Physiology, November 1, 1999; 121(3): 813 - 820.
[Abstract] [Full Text]

Home page
 Plant Physiol.Home page
S. F. Clarke, M. J. McKenzie, D. J. Burritt, P. L. Guy, and P. E. Jameson
Influence of White Clover Mosaic Potexvirus Infection on the Endogenous Cytokinin Content of Bean
Plant Physiology, June 1, 1999; 120(2): 547 - 552.
[Abstract] [Full Text]


Disclaimer:
Please note that abstracts for content published before 1996 were created through digital scanning and may therefore not exactly replicate the text of the original print issues. All efforts have been made to ensure accuracy, but the Publisher will not be held responsible for any remaining inaccuracies. If you require any further clarification, please contact our Customer Services Department.