Skip Navigation


JXB Advance Access originally published online on April 4, 2005
Journal of Experimental Botany 2005 56(416):1553-1562; doi:10.1093/jxb/eri150
This Article
Right arrow Full Text Freely available
Right arrow FREE Full Text (PDF) Freely available
Right arrow All Versions of this Article:
56/416/1553    most recent
eri150v1
Right arrow E-letters: Submit a response
Right arrow Alert me when this article is cited
Right arrow Alert me when E-letters are posted
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 ISI Web of Science
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Add to My Personal Archive
Right arrow Download to citation manager
Right arrow Search for citing articles in:
ISI Web of Science (6)
Right arrowRequest Permissions
Right arrow Disclaimer
Google Scholar
Right arrow Articles by Martínez-Cordero, M. A.
Right arrow Articles by Rubio, F.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Martínez-Cordero, M. A.
Right arrow Articles by Rubio, F.
Agricola
Right arrow Articles by Martínez-Cordero, M. A.
Right arrow Articles by Rubio, F.
Social Bookmarking
Add to CiteULike   Add to Connotea   Add to Del.icio.us  
What's this?

© The Author [2005]. Published by Oxford University Press [on behalf of the Society for Experimental Biology]. All rights reserved. For Permissions, please e-mail: journals.permissions@oupjournals.org

RESEARCH PAPER

High-affinity K+ uptake in pepper plants

M. Angeles Martínez-Cordero, Vicente Martínez and Francisco Rubio*

Departamento de Nutrición Vegetal, Centro de Edafología y Biología Aplicada del Segura-CSIC, Apartado de Correos 164, E-30100 Murcia, Spain

* To whom correspondence should be addressed. Fax: +34 968 396 213. E-mail: frubio{at}cebas.csic.es

High-affinity K+ uptake is an essential process for plant nutrition under K+-limiting conditions. The results presented here demonstrate that pepper (Capsicum annuum) plants grown in the absence of and starved of K+ show an -sensitive high-affinity K+ uptake that allows plant roots to deplete external K+ to values below 1 µM. When plants are grown in the presence of high-affinity K+ uptake is not inhibited by . Although -grown plants deplete external K+ below 1 µM in the absence of when 1 mM is present they do not deplete external K+ below 10 µM. A K+ transporter of the HAK family, CaHAK1, is very likely mediating the -sensitive component of the high-affinity K+ uptake in pepper roots. CaHAK1 is strongly induced in the roots that show the -sensitive high-affinity K+ uptake and its induction is reduced in K+-starved plants grown in the presence of . The -insensitive K+ uptake may be mediated by an AKT1-like K+ channel.

Key words: Ammonium, pepper, potassium, transport


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
 J Exp BotHome page
H. J. Kronzucker, M. W. Szczerba, L. M. Schulze, and D. T. Britto
Non-reciprocal interactions between K+ and Na+ ions in barley (Hordeum vulgare L.)
J. Exp. Bot., July 1, 2008; 59(10): 2793 - 2801.
[Abstract] [Full Text] [PDF]

Home page
 J Exp BotHome page
P. Diaz-Vivancos, M. J. Clemente-Moreno, M. Rubio, E. Olmos, J. A. Garcia, P. Martinez-Gomez, and J. A. Hernandez
Alteration in the chloroplastic metabolism leads to ROS accumulation in pea plants in response to plum pox virus
J. Exp. Bot., May 1, 2008; 59(8): 2147 - 2160.
[Abstract] [Full Text] [PDF]

Home page
 J Exp BotHome page
Z. Qi, C. R. Hampton, R. Shin, B. J. Barkla, P. J. White, and D. P. Schachtman
The high affinity K+ transporter AtHAK5 plays a physiological role in planta at very low K+ concentrations and provides a caesium uptake pathway in Arabidopsis
J. Exp. Bot., February 16, 2008; (2008) erm330v1.
[Abstract] [Full Text] [PDF]

Home page
 J Exp BotHome page
A. Rodriguez-Navarro and F. Rubio
High-affinity potassium and sodium transport systems in plants
J. Exp. Bot., March 1, 2006; 57(5): 1149 - 1160.
[Abstract] [Full Text] [PDF]


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.