Understanding salt tolerance mechanisms in wheat genotypes by exploring antioxidant enzymes

M. Amjad; J. Akhtar; M.A. Haq; M.A. Riaz; Sven-Erik Jacobsen

Understanding salt tolerance mechanisms in wheat genotypes by exploring antioxidant enzymes

M. Amjad^*, J. Akhtar, M.A. Haq, M.A. Riaz, Sven-Erik Jacobsen

^*Corresponding author af dette arbejde

Afgrødevidenskab

9 Citationer (Scopus)

Abstract

The activities of antioxidant enzymes were analyzed in six wheat genotypes under different concentrations of NaCl (0, 100 and 200 mM). Plants were harvested after either 15 or 30 days of salt stress. The most salt tolerant genotype (SARC-1) maintained lower Na⁺ and higher relative growth rate (RGR), shoot fresh weight (SFW), shoot-root ratio, and K⁺:Na⁺ ratio, compared to the most salt sensitive genotypes (S-9189 and S-9476). Superoxide dismutase (SOD) and catalase (CAT) increased significantly in SARC-1 and SARC-2 with increasing salt stress, while there was no difference in S-9189 and S- 9476. Additionally, glutathione reductase (GR) activity was decreased in salt sensitive (S-9189 and S-9476) than salt tolerant (SARC-1) genotypes. Under salt stress conditions a negative relationship between SOD and leaf Na+, and a positive between SOD and shoot fresh weight (SFW), were observed. The higher efficiency of antioxidant enzymes of tolerant genotypes could be considered as one of the factors involved in salt tolerance of wheat.

Originalsprog	Engelsk
Tidsskrift	Pakistan Journal of Agricultural Sciences
Vol/bind	51
Udgave nummer	4
Sider (fra-til)	969-976
Antal sider	8
ISSN	0552-9034
Status	Udgivet - 2014

Citationsformater

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title = "Understanding salt tolerance mechanisms in wheat genotypes by exploring antioxidant enzymes",

abstract = "The activities of antioxidant enzymes were analyzed in six wheat genotypes under different concentrations of NaCl (0, 100 and 200 mM). Plants were harvested after either 15 or 30 days of salt stress. The most salt tolerant genotype (SARC-1) maintained lower Na+ and higher relative growth rate (RGR), shoot fresh weight (SFW), shoot-root ratio, and K+:Na+ ratio, compared to the most salt sensitive genotypes (S-9189 and S-9476). Superoxide dismutase (SOD) and catalase (CAT) increased significantly in SARC-1 and SARC-2 with increasing salt stress, while there was no difference in S-9189 and S- 9476. Additionally, glutathione reductase (GR) activity was decreased in salt sensitive (S-9189 and S-9476) than salt tolerant (SARC-1) genotypes. Under salt stress conditions a negative relationship between SOD and leaf Na+, and a positive between SOD and shoot fresh weight (SFW), were observed. The higher efficiency of antioxidant enzymes of tolerant genotypes could be considered as one of the factors involved in salt tolerance of wheat.",

keywords = "Antioxidants, Oxidative stress, Salt tolerance, Wheat",

author = "M. Amjad and J. Akhtar and M.A. Haq and M.A. Riaz and Sven-Erik Jacobsen",

year = "2014",

language = "English",

volume = "51",

pages = "969--976",

journal = "Pakistan Journal of Agricultural Sciences",

issn = "0552-9034",

publisher = "University of Agriculture Faisalabad",

number = "4",

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TY - JOUR

T1 - Understanding salt tolerance mechanisms in wheat genotypes by exploring antioxidant enzymes

AU - Amjad, M.

AU - Akhtar, J.

AU - Haq, M.A.

AU - Riaz, M.A.

AU - Jacobsen, Sven-Erik

PY - 2014

Y1 - 2014

N2 - The activities of antioxidant enzymes were analyzed in six wheat genotypes under different concentrations of NaCl (0, 100 and 200 mM). Plants were harvested after either 15 or 30 days of salt stress. The most salt tolerant genotype (SARC-1) maintained lower Na+ and higher relative growth rate (RGR), shoot fresh weight (SFW), shoot-root ratio, and K+:Na+ ratio, compared to the most salt sensitive genotypes (S-9189 and S-9476). Superoxide dismutase (SOD) and catalase (CAT) increased significantly in SARC-1 and SARC-2 with increasing salt stress, while there was no difference in S-9189 and S- 9476. Additionally, glutathione reductase (GR) activity was decreased in salt sensitive (S-9189 and S-9476) than salt tolerant (SARC-1) genotypes. Under salt stress conditions a negative relationship between SOD and leaf Na+, and a positive between SOD and shoot fresh weight (SFW), were observed. The higher efficiency of antioxidant enzymes of tolerant genotypes could be considered as one of the factors involved in salt tolerance of wheat.

AB - The activities of antioxidant enzymes were analyzed in six wheat genotypes under different concentrations of NaCl (0, 100 and 200 mM). Plants were harvested after either 15 or 30 days of salt stress. The most salt tolerant genotype (SARC-1) maintained lower Na+ and higher relative growth rate (RGR), shoot fresh weight (SFW), shoot-root ratio, and K+:Na+ ratio, compared to the most salt sensitive genotypes (S-9189 and S-9476). Superoxide dismutase (SOD) and catalase (CAT) increased significantly in SARC-1 and SARC-2 with increasing salt stress, while there was no difference in S-9189 and S- 9476. Additionally, glutathione reductase (GR) activity was decreased in salt sensitive (S-9189 and S-9476) than salt tolerant (SARC-1) genotypes. Under salt stress conditions a negative relationship between SOD and leaf Na+, and a positive between SOD and shoot fresh weight (SFW), were observed. The higher efficiency of antioxidant enzymes of tolerant genotypes could be considered as one of the factors involved in salt tolerance of wheat.

KW - Antioxidants

KW - Oxidative stress

KW - Salt tolerance

KW - Wheat

M3 - Journal article

AN - SCOPUS:84920011436

SN - 0552-9034

VL - 51

SP - 969

EP - 976

JO - Pakistan Journal of Agricultural Sciences

JF - Pakistan Journal of Agricultural Sciences

IS - 4

ER -

Understanding salt tolerance mechanisms in wheat genotypes by exploring antioxidant enzymes

Abstract

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