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


     

Plant Physiology Preview
Published on September 7, 2007; 10.1104/pp.107.104851

This Article
Right arrow Full Text (Plant Physiology Preview (PDF))
Right arrow Supplemental Data
Right arrow All Versions of this Article:
145/3/853    most recent
pp.107.104851v1
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 (2)
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Efetova, M.
Right arrow Articles by Deeken, R.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Efetova, M.
Right arrow Articles by Deeken, R.
Agricola
Right arrow Articles by Efetova, M.
Right arrow Articles by Deeken, R.

Received July 3, 2007
Accepted August 9, 2007

A Central Role of ABA in Drought Stress Protection of Agrobacterium-Induced Tumors on Arabidopsis

Marina Efetova , Juergen Zeier , Markus Riederer , Chil-Woo Lee , Nadja Stingl , Martin Müller , Wolfram Hartung , Rainer Hedrich , and Rosalia Deeken *

Julius-von-Sachs-Institute, Department of Molecular Plant Physiology and Biophysics, Biocenter, University of Wuerzburg, Julius-von-Sachs-Platz 2, D-97082 Wuerzburg, Germany; Julius-von-Sachs Institute, Department of Botany II, Biocenter, University of Wuerzburg Julius-von-Sachs-Platz 3, D-97082 Würzburg, Germany; Julius-von-Sachs-Institute, Department of Pharmaceutical Biology, Biocenter, University of Wuerzburg, Julius-von-Sachs-Platz 2, D-97082 Wuerzburg, Germany

* Corresponding author; email: deeken{at}botanik.uni-wuerzburg.de.

Crown gall tumors induced by Agrobacterium tumefaciens represent a sink which has to be provided with nutrients and water by the host plant. The lack of an intact epidermis or cuticle results in uncontrolled loss of water. However, neither the tumor nor the host plant displays wilting. This phenomenon points to drought adaptation in both, tumors and the crown gall host plant. In order to understand the underlying molecular mechanisms of protection against desiccation the gene expression pattern of Arabidopsis thaliana tumors was integrated with the profile of stress metabolites: Arabidopsis tumors accumulated high amounts of ABA, the ethylene precursor ACC, osmoprotectants and form a suberized periderm-like protective layer. Suberization of the outer tumor cell layers most likely is mediated by ABA since external application of ABA induced suberization of Arabidopsis roots. However, the expression level of the classical marker genes, known to respond to drought-stress and/or ABA, was lower in tumors. Instead another set of drought and/or ABA-inducible genes, was higher transcribed. Elevated transcription of several ABA-dependent aquaporin genes might indicate that ABA controls the water balance of the tumor. The retarded tumor growth on abi and aba mutant plants underlined the importance of a tumor-specific ABA signaling pathway. Taken together, we propose that ABA is an important signal for protection of tumors against desiccation and thus supports tumor development.




This article has been cited by other articles:


Home page
 Plant CellHome page
C.-W. Lee, M. Efetova, J. C Engelmann, R. Kramell, C. Wasternack, J. Ludwig-Muller, R. Hedrich, and R. Deeken
Agrobacterium tumefaciens Promotes Tumor Induction by Modulating Pathogen Defense in Arabidopsis thaliana
PLANT CELL, September 1, 2009; 21(9): 2948 - 2962.
[Abstract] [Full Text] [PDF]

Home page
 J Exp BotHome page
E. C. Lulai, J. C. Suttle, and S. M. Pederson
Regulatory involvement of abscisic acid in potato tuber wound-healing
J. Exp. Bot., April 1, 2008; 59(6): 1175 - 1186.
[Abstract] [Full Text] [PDF]


HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH
ASPB Publications PLANT PHYSIOLOGY® THE PLANT CELL
Copyright © 2007 by the American Society of Plant Biologists