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Publication Type J
Authors Muhling, KH; Lauchli, A
Author Full Name Muhling, KH; Lauchli, A
Title Interaction of NaCl and Cd stress on compartmentation pattern of cations, antioxidant enzymes and proteins in leaves of two wheat genotypes differing in salt tolerance
Source PLANT AND SOIL
Language English
Document Type Article
Author Keywords antioxidant enzymes; apoplast; cadmium; leaf; protein; salinity
Keywords Plus X LOPHOPYRUM-ELONGATUM; BARLEY SEEDLINGS; SALINITY STRESS; SWISS-CHARD; CADMIUM; PLANTS; CHLORIDE; AVAILABILITY; ACCUMULATION; EXTRACTION
Abstract Physiological mechanisms of salinity-Cd interactions were investigated in inter- and intracellular leaf compartments of salt-tolerant wheat x Lophopyrum elongatum (Host) A. Love (syn. Agropyron elongatum) amphiploid and its salt-sensitive wheat parent (Triticum aestivum L. cv Chinese Spring). In comparison with the intracellular fluid, only very low Na+ concentrations (up to about 4 mM) were found in the intercellular leaf compartment of wheat after a 75 mM supply of NaCl. NaCl salinity led to a higher Cd concentration in leaves of the salt-sensitive genotype. Cd in the intercellular leaf compartment was not detectable. Higher K+ concentrations in the intercellular leaf compartment of the salt-sensitive genotype suggest a higher plasma membrane permeability caused by NaCl + Cd stress. Ascorbate peroxidase (APX) activity was increased in leaves of the salt-sensitive genotype under the combined NaCl and Cd stress. The highest non-specific peroxidase activities were detected under the combined stresses. It is suggested that NaCl and Cd stress in combination enhance the production of oxygen radicals and H2O2, especially in leaves of the salt-sensitive genotype. As a consequence, disturbed membrane function may cause elevated Cd concentrations in the intracellular leaf compartment under salinity. Cd did not change protein concentration and pattern in leaves. The protein content in inter- and intracellular leaf compartments of both genotypes was increased under salinity. A different protein pattern was obtained in inter- and intracellular leaf compartments. Thus, several physiological interactions between NaCl stress and Cd were found in the two wheat genotypes.
Author Address Univ Calif Davis, Dept Land Air & Water Resources Soils & Biogeoche, Davis, CA 95616 USA
Reprint Address Lauchli, A (reprint author), Univ Calif Davis, Dept Land Air & Water Resources Soils & Biogeoche, 1 Shields Ave, Davis, CA 95616 USA.
ResearcherID Number Muehling, Karl/L-6443-2014; Lauchli, Andre/B-4241-2013
ORCID Number Muehling, Karl/0000-0002-9922-6581;
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Cited Reference Count 45
Times Cited 42
Total Times Cited Count (WoS, BCI, and CSCD) 49
Publisher KLUWER ACADEMIC PUBL
Publisher City DORDRECHT
Publisher Address VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
ISSN 0032-079X
29-Character Source Abbreviation PLANT SOIL
ISO Source Abbreviation Plant Soil
Publication Date JUN
Year Published 2003
Volume 253
Issue 1
Beginning Page 219
Ending Page 231
Digital Object Identifier (DOI) 10.1023/A:1024517919764
Subject Category 13
Document Delivery Number Agronomy; Plant Sciences; Soil Science
Unique Article Identifier Agriculture; Plant Sciences
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