Plant Physiol.
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH
QUICK SEARCH:   [advanced]


     

Plant Physiology Preview
Published on October 29, 2004; 10.1104/pp.104.048900

This Article
Right arrow Full Text (Plant Physiology Preview (PDF))
Right arrow All Versions of this Article:
136/3/3628    most recent
pp.104.048900v1
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 Similar articles in Web of Science
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via CrossRef
Right arrow Citing Articles via Web of Science (29)
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Dong, H.-P.
Right arrow Articles by Dong, H.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Dong, H.-P.
Right arrow Articles by Dong, H.
Agricola
Right arrow Articles by Dong, H.-P.
Right arrow Articles by Dong, H.

Received June 30, 2004
Returned for revision September 11, 2004
Accepted September 20, 2004

Downstream Divergence of the Ethylene Signaling Pathway for Harpin-Stimulated Arabidopsis Growth and Insect Defense

Hong-Ping Dong , Jianling Peng , Zhilong Bao , Xiangdong Meng , Jean M. Bonasera , Guangyong Chen , Steven V. Beer , and Hansong Dong *

Department of Plant Pathology, Nanjing Agricultural University, Nanjing 210095, China
Department of Plant Pathology, Cornell University, Ithaca, New York 14853

* Corresponding author; email: hsdong{at}njau.edu.cn.

Ethylene (ET) signal transduction may regulate plant growth and defense, depending on which components are recruited into the pathway in response to different stimuli. We report here that the ET pathway controls both insect resistance (IR) and plant growth enhancement (PGE) in Arabidopsis (Arabidopsis thaliana) plants responding to harpin, a protein produced by a plant pathogenic bacterium. PGE may result from spraying plant tops with harpin or by soaking seeds in harpin solution; the latter especially enhances root growth. Plants treated similarly develop resistance to the green peach aphid (Myzus persicae). The salicylic acid pathway, although activated by harpin, does not lead to PGE and IR. By contrast, PGE and IR are induced in both wild-type plants and genotypes that have defects in salicylic acid signaling. In response to harpin, levels of jasmonic acid (JA) decrease, and the COI1 gene, which is indispensable for JA signal transduction, is not expressed in wild-type plants. However, PGE and IR are stimulated in the JA-resistant mutant jar1-1. In the wild type, PGE and IR develop coincidently with increases in ET levels and the expression of several genes essential for ET signaling. The ET receptor gene ETR1 is required because both phenotypes are arrested in the etr1-1 mutant. Consistently, inhibition of ET perception nullifies the induction of both PGE and IR. The signal transducer EIN2 is required for IR, and EIN5 is required for PGE because IR and PGE are impaired correspondingly in the ein2-1 and ein5-1 mutants. Therefore, harpin activates ET signaling while conscribing EIN2 and EIN5 to confer IR and PGE, respectively.




This article has been cited by other articles:


Home page
 J. Cell Sci.Home page
Y. Wang, R. Liu, L. Chen, Y. Wang, Y. Liang, X. Wu, B. Li, J. Wu, Y. Liang, X. Wang, et al.
Nicotiana tabacum TTG1 contributes to ParA1-induced signalling and cell death in leaf trichomes
J. Cell Sci., August 1, 2009; 122(15): 2673 - 2685.
[Abstract] [Full Text] [PDF]

Home page
 Plant CellHome page
S. AbuQamar, M.-F. Chai, H. Luo, F. Song, and T. Mengiste
Tomato Protein Kinase 1b Mediates Signaling of Plant Responses to Necrotrophic Fungi and Insect Herbivory
PLANT CELL, July 1, 2008; 20(7): 1964 - 1983.
[Abstract] [Full Text] [PDF]

Home page
 Plant Physiol.Home page
C.-S. Oh and S. V. Beer
AtHIPM, an Ortholog of the Apple HrpN-Interacting Protein, Is a Negative Regulator of Plant Growth and Mediates the Growth-Enhancing Effect of HrpN in Arabidopsis
Plant Physiology, October 1, 2007; 145(2): 426 - 436.
[Abstract] [Full Text] [PDF]

Home page
 Plant CellHome page
T. Potuschak, A. Vansiri, B. M. Binder, E. Lechner, R. D. Vierstra, and P. Genschik
The Exoribonuclease XRN4 Is a Component of the Ethylene Response Pathway in Arabidopsis
PLANT CELL, November 1, 2006; 18(11): 3047 - 3057.
[Abstract] [Full Text] [PDF]


HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH
ASPB Publications PLANT PHYSIOLOGY® THE PLANT CELL
Copyright © 2004 by the American Society of Plant Biologists