Antioxidant defense mechanism under salt stress in wheat seedlings

被引：176

作者：

Mandhania, S ^{[1
]}

Madan, S ^{[1
]}

Sawhney, V ^{[1
]}

机构：

[1] CCS Haryana Agr Univ, Dept Plant Breeding, Hisar 125004, Haryana, India

来源：

BIOLOGIA PLANTARUM | 2006年 / 50卷 / 02期

关键词：

ascorbate peroxidase; calatase; glutathione reductase; hydrogen peroxide; malondialdehyde; peroxidase; superoxide dismutase; Triticum aestivum;

D O I：

10.1007/s10535-006-0011-7

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

The present study was carried out to study the effect of salt stress on cell membrane damage, ion content and antioxidant enzymes in wheat (Triticum aestivum) seedlings of two cultivars salt-tolerant KRL-19 and salt-sensitive WH-542. Seedlings (4-d-old) were irrigated with 0, 50 and 100 mM NaCl. Observations were recorded on the 3(rd) and 6(th) day after salt treatment and 2(nd) day after salt removal. The relative water content declined with induction of salt stress, more in WH-542 than in cv. KRL-19. K+/Na+ ratio in KRL-19 was higher than in WH-542. WH-542 suffered greater damage to cellular membranes due to lipid peroxidation as indicated by higher accumulation of H2O2, MDA and greater leakage of electrolytes than KRL-19. The activities of catalase, peroxidase and ascorbate peroxidase and glutathione reductase increased with increase in salt stress in both the cultivars, however, superoxide dismutase activity declined. Upon desalanization, partial recovery in the activities of these enzymes was observed in KRL-19 and very slow recovery in WH-542.

引用

页码：227 / 231

页数：5

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