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Author(s): Noreen Z (Noreen, Zahra); Ashraf M (Ashraf, Muhammad)
Title: Changes in antioxidant enzymes and some key metabolites in some genetically diverse cultivars of radish (Raphanus sativus L.)
Source: ENVIRONMENTAL AND EXPERIMENTAL BOTANY 67 (2): 395-402
Date: 2009 DEC
Document Type: Journal : Article
DOI: 10.1016/j.envexpbot.2009.05.011
Language: English
Comment:
Address: Univ Agr Faisalabad, Dept Bot, Faisalabad, Pakistan.
Reprint: Ashraf, M, Univ Agr Faisalabad, Dept Bot, Faisalabad, Pakistan.
E-mail: ashrafbot@yahoo.com
Author Keywords: Salt stress; Radish; Chlorophyll pigments; Antioxidants
KeyWords Plus: INDUCED OXIDATIVE STRESS; CROP SALT TOLERANCE; SALINITY TOLERANCE;
SELECTION CRITERIA; WHEAT GENOTYPES; WATER RELATIONS; RICE SEEDLINGS;
NACL SALINITY; NITROGEN FORM; HIGHER-PLANTS
Abstract: Salt-induced changes in the activities of antioxidant enzymes such as superoxide dismutase (SOD), catalase (CAT), peroxidase (POX), and lipid peroxidation in terms of malondialdehyde (MDA), level of H2O2, and some key metabolites such as soluble proteins, free proline and phenolics in the leaves of six radish cultivars (Radish Red Neck, Radish Lai Pari, Radish Mino Japani. Radish 40 Days, Mannu Early and Desi) were investigated. Varying levels of NaCl (0, 80 and 160 mM) applied for 40 days adversely affected the shoot fresh weight, chlorophyll contents and soluble proteins, while increased the levels of proline, and the activities of SOD, POD and CAT. However, leaf H2O2 and total phenolic contents were not affected by salt stress. Cultivars Mannu Early, Radish 40 Days and Desi were relatively higher in shoot fresh weight (percent of control) while cvs. Radish MinoJapani and Mannu Early in proline, and cvs. Radish 40 Days and Desi in total soluble proteins at 160 mM of NaCl. However, levels of H2O2 and phenolics were higher in cvs. Desi, Radish Lai Pari and Mannu Early and SOD, POD and CAT activities only in Radish Lai Pari and Mannu Early than the other cultivars under saline conditions. Overall, the differential salt tolerance of radish cultivars; observed in the present study was not found to be associated with higher antioxidant enzyme activities and other key metabolites analyzed, so these attributes cannot be considered as selection criteria for salt tolerance in radish. (C) 2009 Elsevier B.V. All rights reserved.
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