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Authors Sekmen, AH; Turkan, I; Takio, S
Author Full Name Sekmen, Askim Hediye; Tuerkan, Ismail; Takio, Susumu
Title Differential responses of antioxidative enzymes and lipid peroxidation to salt stress in salt-tolerant Plantago maritima and salt-sensitive Plantago media
Source PHYSIOLOGIA PLANTARUM
Language English
Document Type Article
Keywords Plus RELATIVE LYCOPERSICON-PENNELLII; INDUCED OXIDATIVE STRESS; LEAF WATER RELATIONS; GLUTATHIONE-REDUCTASE; SALINITY STRESS; SUPEROXIDE DISMUTASES; CULTIVATED TOMATO; ION CONTENT; PEA-PLANTS; PHOTOSYNTHESIS
Abstract The changes in plant growth, relative water content (RWC), stomatal conductance, lipid peroxidation and antioxidant system in relation to the tolerance to salt stress were investigated in salt-tolerant Plantago maritima and salt-sensitive Plantago media. The 60 days old P. maritima and P. media seedlings were subjected to 0, 100 and 200 mM NaCl for 7 days. Reduction in shoot length was higher in P. media than in P. maritima after exposure to 200 mM NaCl, but 100 mM NaCl treatment did not show any effect on shoot length of P. maritima. Shoot dry weight decreased in P. media and did not change in P. maritima. Two hundred millimolar NaCl treatment had no effect on leaf RWC in P. maritima, but it was reduced in P. media. Salt stress caused reduction in stomatal conductance being more pronounced in P. media than in P. maritima. Activities of superoxide dismutase (SOD; EC 1.15.1.1), catalase (CAT; EC 1.11.1.6), glutathione reductase (GR; EC 1.6.4.2) decreased in P. media with increasing salinity. Ascorbate peroxidase (APX; EC 1.11.1.11) activity in leaves of P. media was increased and showed no change under 100 and 200 mM NaCl, respectively. However, activities of CAT, APX and GR increased under 200 mM NaCl while their activities did not change under 100 mM NaCl in P. maritima. SOD activity in leaves of P. maritima increased with increasing salinity. Concomitant with this, four SOD activity bands were identified in leaves of P. maritima, two bands only were observed in P. media. Peroxidase (POX; EC 1.11.1.7) activity increased under both salt concentrations in P. maritima, but only under 200 mM NaCl in P. media. Confirming this, five POX activity bands were identified in leaves of P. maritima, but only two bands were determined in P. media. Malondialdehyde levels in the leaves increased under salt stress in P. media but showed no change and decreased in P. maritima at 100 and 200 mM NaCl, respectively. These results suggest that the salt-tolerant P. maritima showed a better protection mechanism against oxidative damage caused by salt stress by its higher induced activities of antioxidant enzymes than the salt-sensitive P. media.
Author Address Ege Univ, Fac Sci, Dept Biol, TR-35100 Izmir, Turkey; Kumamoto Univ, Ctr Marine Environm Studies, Kumamoto 860, Japan
Reprint Address Turkan, I (corresponding author), Ege Univ, Fac Sci, Dept Biol, TR-35100 Izmir, Turkey.
E-mail Address ismail.turkan@ege.edu.tr
ORCID Number TURKAN, ISMAIL/0000-0001-9042-6870
Times Cited 168
Total Times Cited Count (WoS, BCI, and CSCD) 187
Publisher WILEY-BLACKWELL
Publisher City HOBOKEN
Publisher Address 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
ISSN 0031-9317
29-Character Source Abbreviation PHYSIOL PLANTARUM
ISO Source Abbreviation Physiol. Plant.
Publication Date NOV
Year Published 2007
Volume 131
Issue 3
Beginning Page 399
Ending Page 411
Digital Object Identifier (DOI) 10.1111/j.1399-3054.2007.00970.x
Page Count 13
Web of Science Category Plant Sciences
Subject Category Plant Sciences
Document Delivery Number 215RQ
Unique Article Identifier WOS:000249827100005
Plants associated with this reference

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