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


     

Plant Physiology Preview
Published on January 4, 2008; 10.1104/pp.107.110742

OPEN ACCESS ARTICLE
This Article
Free via Open Access: OA
Right arrow Full Text (Plant Physiology Preview (PDF))
Right arrow Supplemental Data
Right arrowOA All Versions of this Article:
146/3/1219    most recent
pp.107.110742v1
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 (7)
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Tamaoki, M.
Right arrow Articles by Pilon-Smits, E. A. H.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Tamaoki, M.
Right arrow Articles by Pilon-Smits, E. A. H.
Agricola
Right arrow Articles by Tamaoki, M.
Right arrow Articles by Pilon-Smits, E. A. H.

Received October 10, 2007
Accepted December 22, 2007

Cooperative Ethylene and Jasmonic Acid Signaling Regulates Selenite Resistance in Arabidopsis

Masanori Tamaoki *, John L. Freeman , and Elizabeth A. H. Pilon-Smits

Biology Department, Colorado State University, Fort Collins, CO 80523, USA; Environmental Biology Division, National Institute for Environmental Studies, Tsukuba, Ibaraki 305-8506, Japan; Graduate School of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan

* Corresponding author; email: mtamaoki{at}nies.go.jp.

Selenium (Se) is an essential element for many organisms, but excess Se is toxic. To better understand plant Se toxicity and resistance mechanisms, we compared the physiological and molecular responses of two Arabidopsis accessions, Col-0 and Ws-2, to selenite treatment. Measurement of root length Se tolerance index demonstrated a clear difference between selenite-resistant Col-0 and selenite-sensitive Ws-2. Macroarray analysis showed more pronounced selenite-induced increases in mRNA levels of ethylene or jasmonic acid (JA) biosynthesis and -inducible genes in Col-0 than in Ws-2. Indeed, Col-0 exhibited higher levels of ethylene and JA. The selenite-sensitive phenotype of Ws-2 was attenuated by treatment with ethylene precursor or MeJA. Conversely, the selenite resistance of Col-0 was reduced in mutants impaired in ethylene- or JA-biosynthesis or signaling. Genes encoding sulfur (S) transporters and S assimilation enzymes were upregulated by selenite in Col-0 but not Ws-2. Accordingly, Col-0 contained higher levels of total S and Se and of non-protein thiols than Ws-2. Glutathione redox status was reduced by selenite in Ws-2 but not in Col-0. Furthermore, the generation of reactive oxygen species (ROS) by selenite was higher in Col-0 than in Ws-2. Together these results indicate that JA and ethylene play important roles in Se resistance in Arabidopsis. ROS may also have a signaling role, and the resistance mechanism appears to involve enhanced S uptake and reduction.




This article has been cited by other articles:


Home page
 Plant Physiol.Home page
X. Zhou, Y. Yuan, Y. Yang, M. Rutzke, T. W. Thannhauser, L. V. Kochian, and L. Li
Involvement of a Broccoli COQ5 Methyltransferase in the Production of Volatile Selenium Compounds
Plant Physiology, October 1, 2009; 151(2): 528 - 540.
[Abstract] [Full Text] [PDF]

Home page
 Plant Physiol.Home page
V. Hugouvieux, C. Dutilleul, A. Jourdain, F. Reynaud, V. Lopez, and J. Bourguignon
Arabidopsis Putative Selenium-Binding Protein1 Expression Is Tightly Linked to Cellular Sulfur Demand and Can Reduce Sensitivity to Stresses Requiring Glutathione for Tolerance
Plant Physiology, October 1, 2009; 151(2): 768 - 781.
[Abstract] [Full Text] [PDF]


HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH
ASPB Publications PLANT PHYSIOLOGY® THE PLANT CELL
Copyright © 2008 by the American Society of Plant Biologists