Plant Physiology 79:207-211 (1985)
© 1985 American Society of Plant Biologists
Articles
Displacement of Ca2+ by Na+ from the Plasmalemma of Root Cells 1
A Primary Response to Salt Stress?
Grant R. Cramer,
André Läuchli and
Vito S. Polito
Department of Land, Air, and Water Resources, University of California, Davis, California 95616,
Department of Pomology, University of California, Davis, California 95616
A microfluorometric assay using chlorotetracycline (CTC) as a probe for membrane-associated Ca2+ in intact cotton (Gossypium hirsutum L. cv Acala SJ-2) root hairs indicated displacement of Ca2+ by Na+ from membrane sites with increasing levels of NaCl (0 to 250 millimolar). K+(86Rb) efflux increased dramatically at high salinity. An increase in external Ca2+ concentration (10 millimolar) mitigated both responses. Other cations and mannitol, which did not affect Ca2+-CTC chelation properties, were found to have no effect on Ca2+-CTC fluorescence, indicating a Na+-specific effect. Reduction of Ca2+-CTC fluorescence by ethyleneglycol-bis-( -aminoethyl ether) N,N'-tetraacetic acid, which does not cross membranes, provided an indication that reduction by Na+ of Ca2+-CTC fluorescence may be occurring primarily at the plasmalemma. The findings support prior proposals that Ca2+ protects membranes from adverse effects of Na+ thereby maintaining membrane integrity and minimizing leakage of cytosolic K+.
1 Supported by National Science Foundation grant DMB84-04442.
This article has been cited by other articles:
|
|
|
|
 
H. Evelin, R. Kapoor, and B. Giri
Arbuscular mycorrhizal fungi in alleviation of salt stress: a review
Ann. Bot.,
December 1, 2009;
104(7):
1263 - 1280.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
G.-J. Lee, R. R. Duncan, and R. N. Carrow
Nutrient Uptake Responses and Inorganic Ion Contribution to Solute Potential under Salinity Stress in Halophytic Seashore Paspalums
Crop Sci.,
November 7, 2007;
47(6):
2504 - 2512.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
F. J. Cabanero, M. C. Martinez-Ballesta, J. A. Teruel, and M. Carvajal
New Evidence About the Relationship Between Water Channel Activity and Calcium in Salinity-stressed Pepper Plants
Plant Cell Physiol.,
February 1, 2006;
47(2):
224 - 233.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
G. W. Netondo, J. C. Onyango, and E. Beck
Sorghum and Salinity: I. Response of Growth, Water Relations, and Ion Accumulation to NaCl Salinity
Crop Sci.,
May 1, 2004;
44(3):
797 - 805.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
M. TESTER and R. DAVENPORT
Na+ Tolerance and Na+ Transport in Higher Plants
Ann. Bot.,
April 1, 2003;
91(5):
503 - 527.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
J. S. Bayuelo-Jimenez, D. G. Debouck, and J. P. Lynch
Salinity Tolerance in Phaseolus Species during Early Vegetative Growth
Crop Sci.,
November 1, 2002;
42(6):
2184 - 2192.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
J. A. Franklin, S. Renault, C. Croser, J. J. Zwiazek, and M. MacKinnon
Jack Pine Growth and Elemental Composition Are Affected by Saline Tailings Water
J. Environ. Qual.,
March 1, 2002;
31(2):
648 - 653.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
H. Koyama, T. Toda, and T. Hara
Brief exposure to low-pH stress causes irreversible damage to the growing root in Arabidopsis thaliana: pectin-Ca interaction may play an important role in proton rhizotoxicity
J. Exp. Bot.,
February 1, 2001;
52(355):
361 - 368.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
Y. Murata, S. Katsura, I. Obi, and T. Kakutani
Alterations in Ca2+-Binding on Plasma Membrane after Adaptation to Salt Stress of Tobacco Cells in Suspension
Plant Cell Physiol.,
November 1, 2000;
41(11):
1286 - 1292.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
H. H. Zahran
Rhizobium-Legume Symbiosis and Nitrogen Fixation under Severe Conditions and in an Arid Climate
Microbiol. Mol. Biol. Rev.,
December 1, 1999;
63(4):
968 - 989.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
T. B. Kinraide
Three Mechanisms for the Calcium Alleviation of Mineral Toxicities
Plant Physiology,
October 1, 1998;
118(2):
513 - 520.
[Abstract]
[Full Text]
|
|
|
|
|
