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Publication Type J
Authors Ben Amor, N., K. Ben Hamed, A. Debez, C. Grignon and C. Abdelly
Title Physiological and antioxidant responses of the perennial halophyte Crithmum maritimum to salinity
Source Plant Science
Abstract Physiological behavior and antioxidant responses to salinity were studied in Crithmum maritimum, a local halophyte naturally growing on rocky coasts. The plant growth was significantly improved at moderate salt levels (50 mM NaCl), but was drastically reduced at 200 mM NaCl. The stimulation of biomass production at 50 mM NaCl was associated with enhanced root length and leaf number. Tissue hydration seemed unaffected by salinity, despite Na+ and Cl- were largely accumulated in shoots. The highest salinity (200 mM NaCl) induced mineral nutrition disturbance within the plant shoots, as their Ca2+, Mg2+, and K+ concentrations significantly declined. However, C. maritimum displayed high uptake selectivity for the latter. Monitoring lipid peroxidation showed that both root and shoot malonyldialdehyde (MDA) contents of plants cultivated at the optimal salt concentration (50 mM NaCl) were lower than control ones. This was related to enhanced activities of antioxidant enzymes, like superoxide dismutase (SOD) (EC 1.15.1.1), catalase (EC 1.111.1.6), and peroxidase (EC 1.111.1.7), especially in shoots. The limitation of the plant growth at 200 mM NaCl was concomitant with lesser efficiency of these protective enzymes, but MDA levels in both roots and shoots remained close to control ones. (c) 2004 Elsevier Ireland Ltd. All rights reserved.
ISSN 0168-9452
ISBN 0168-9452
Publication Date Apr
Year Published 2005
Volume 168
Issue 4
Beginning Page 889-899
Digital Object Identifier (DOI) 10.1016/j.plantsci.2004.11.002
Unique Article Identifier WOS:000227537400004
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