Plant Cell Huazhong Agricultural University
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

This Article
Right arrow Full Text
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 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 (21)
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Borsani, O.
Right arrow Articles by Botella, M. A.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Borsani, O.
Right arrow Articles by Botella, M. A.
Agricola
Right arrow Articles by Borsani, O.
Right arrow Articles by Botella, M. A.
Plant Cell, Vol. 13, 873-888, April 2001, Copyright © 2001, American Society of Plant Physiologists

Identification of Two Loci in Tomato Reveals Distinct Mechanisms for Salt Tolerance

Omar Borsania, Jesus Cuarterob, José A. Fernándezc, Victoriano Valpuestaa, and Miguel A. Botellaa
a Departamento de Biología Molecular y Bioquímica, Universidad de Málaga, 29071 Málaga, Spain
b Estación Experimental La Mayora–Consejo Superior de Investigaciones Científicas, Algarrobo-Costa, 29750 Málaga, Spain
c Departamento de Biología Vegetal, Universidad de Málaga, 29071 Málaga, Spain

Correspondence to: Miguel A. Botella, mabotella{at}uma.es (E-mail), 34-952-132000 (fax)

Salt stress is one of the most serious environmental factors limiting the productivity of crop plants. To understand the molecular basis for salt responses, we used mutagenesis to identify plant genes required for salt tolerance in tomato. As a result, three tomato salt-hypersensitive (tss) mutants were isolated. These mutants defined two loci and were caused by single recessive nuclear mutations. The tss1 mutant is specifically hypersensitive to growth inhibition by Na+ or Li+ and is not hypersensitive to general osmotic stress. The tss2 mutant is hypersensitive to growth inhibition by Na+ or Li+ but, in contrast to tss1, is also hypersensitive to general osmotic stress. The TSS1 locus is necessary for K+ nutrition because tss1 mutants are unable to grow on a culture medium containing low concentrations of K+. Increased Ca2+ in the culture medium suppresses the growth defect of tss1 on low K+. Measurements of membrane potential in apical root cells were made with an intracellular microelectrode to assess the permeability of the membrane to K+ and Na+. K+-dependent membrane potential measurements indicate impaired K+ uptake in tss1 but not tss2, whereas no differences in Na+ uptake were found. The TSS2 locus may be a negative regulator of abscisic acid signaling, because tss2 is hypersensitive to growth inhibition by abscisic acid. Our results demonstrate that the TSS1 locus is essential for K+ nutrition and NaCl tolerance in tomato. Significantly, the isolation of the tss2 mutant demonstrates that abscisic acid signaling is also important for salt and osmotic tolerance in glycophytic plants.




This article has been cited by other articles:


Home page
 J Exp BotHome page
C. Sirichandra, A. Wasilewska, F. Vlad, C. Valon, and J. Leung
The guard cell as a single-cell model towards understanding drought tolerance and abscisic acid action
J. Exp. Bot., April 1, 2009; 60(5): 1439 - 1463.
[Abstract] [Full Text] [PDF]

Home page
 J Exp BotHome page
B. Ouyang, T. Yang, H. Li, L. Zhang, Y. Zhang, J. Zhang, Z. Fei, and Z. Ye
Identification of early salt stress response genes in tomato root by suppression subtractive hybridization and microarray analysis
J. Exp. Bot., February 1, 2007; 58(3): 507 - 520.
[Abstract] [Full Text] [PDF]

Home page
 Plant Physiol.Home page
A. Rosado, A. L. Schapire, R. A. Bressan, A. L. Harfouche, P. M. Hasegawa, V. Valpuesta, and M. A. Botella
The Arabidopsis Tetratricopeptide Repeat-Containing Protein TTL1 Is Required for Osmotic Stress Responses and Abscisic Acid Sensitivity
Plant Physiology, November 1, 2006; 142(3): 1113 - 1126.
[Abstract] [Full Text] [PDF]

Home page
 J Exp BotHome page
A. Rosado, I. Amaya, V. Valpuesta, J. Cuartero, M. A. Botella, and O. Borsani
ABA- and ethylene-mediated responses in osmotically stressed tomato are regulated by the TSS2 and TOS1 loci
J. Exp. Bot., September 1, 2006; 57(12): 3327 - 3335.
[Abstract] [Full Text] [PDF]

Home page
 Plant Physiol.Home page
L. Rubio, A. Rosado, A. Linares-Rueda, O. Borsani, M. J. Garcia-Sanchez, V. Valpuesta, J. A. Fernandez, and M. A. Botella
Regulation of K+ Transport in Tomato Roots by the TSS1 Locus. Implications in Salt Tolerance
Plant Physiology, January 1, 2004; 134(1): 452 - 459.
[Abstract] [Full Text] [PDF]

Home page
 Plant CellHome page
E. J. Klok, I. W. Wilson, D. Wilson, S. C. Chapman, R. M. Ewing, S. C. Somerville, W. J. Peacock, R. Dolferus, and E. S. Dennis
Expression Profile Analysis of the Low-Oxygen Response in Arabidopsis Root Cultures
PLANT CELL, October 1, 2002; 14(10): 2481 - 2494.
[Abstract] [Full Text] [PDF]


HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
ASPB Publications THE PLANT CELL PLANT PHYSIOLOGY
Copyright © 2001 by the American Society of Plant Biologists