Regulation Effect of Exogenous Selenium on Antioxidative System in Leaves of Processing Tomato Seedling Under Salt Stress(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:

2013年03期

Page:

4-8

Research Field:

Publishing date:

Info

Title:

Regulation Effect of Exogenous Selenium on Antioxidative System in Leaves of Processing Tomato Seedling Under Salt Stress

Author(s):

MA Long¹; YU Xiao-qiang²; FAN Xin-min¹; WANG Jian-wei¹; LIU Hui-ying¹

1.Department of Agronomy，Shihezi University，Shihezi，Xinjiang 832000；

2.Science and Technology Department，Jiangxi Agricultural University，Nanchang，Jiangxi 330045

Keywords:

selenium; processing tomato; salt stress; antioxidative system

PACS:

S 641.2

DOI:

-

Abstract:

The effects of exogenous selenium(Na₂SeO₃ 0.05 mmol/L) on the scavenging system of activated oxygen in leaves of two processing tomato varieties(‘Shuangfeng 87-5’ and ‘Jiahe No.9’ )with different salt tolerance under salt stress(100 mmol/L) were studied.The results showed that exogenous selenium significantly decreased the contents of hydrogen peroxide (H₂O₂) and malondialdehyde(MDA) and the activity of hydrogen peroxidase(CAT)，enhanced the contents of glutathione（GSH） and ascorbic acid(AsA) and activities of superoxide dismutase(SOD)，peroxidase(POD)，ascorbate peroxidase(CAT) and glutathione reductase(GR) in leaves of two processing tomato varieties under salt stress.Those results indicated that selenium could enhance active oxygen scavenging ability and abatement the lipid peroxidament of cell membrance of processing tomato seedlings under salt stress and mitigate the damage of salt stress on processing tomato seedlings under salt stress.The processing tomato variety ‘Jiahe No.9’ with stronger salt-tolerance had highly active oxygen scavenging ability，which could effectively alleviate the toxic effects of salt stress on processing tomato seedling.

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