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Exogenous salicylic acid alleviates NaCl toxicity and increases antioxidative enzyme activity in Lycopersicon esculentum

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  • Published:
Biologia Plantarum

Abstract

Effects of exogenous salicylic acid (SA) on plant growth, contents of Na, K, Ca and Mg, activities of superoxide dismutase (SOD), guaiacol peroxidase (GPX), ascorbate peroxidase (APX), dehydroascorbate reductase (DHAR), glutathione reductase (GR) and catalase (CAT), and contents of ascorbate and glutathione were investigated in tomato (Lycopersicon esculentum L.) plants treated with 100 mM NaCl. NaCl treatment significantly increased H2O2 content and lipid peroxidation indicated by accumulation of thiobarbituric acid reactive substances (TBARS). A foliar spray of 1 mM SA significantly decreased lipid peroxidation caused by NaCl and improved the plant growth. This alleviation of NaCl toxicity by SA was related to decreases in Na contents, increases in K and Mg contents in shoots and roots, and increases in the activities of SOD, CAT, GPX and DHAR and the contents of ascorbate and glutathione.

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Abbreviations

APX:

ascorbate peroxidase

ASC:

reduced ascorbate

CAT:

catalase

DHA:

dehydroascorbate

DHAR:

dehydroascorbate reductase

EDTA:

ethylenediaminetetra-acetic acid

GPX:

guaiacol peroxidase

GR:

glutathione reductase

GSH:

reduced glutathione

GSSG:

oxidized glutathione

NBT:

nitroblue tetrazolium

PVP:

polyvinylpyrrolidone

RH:

relative humidity

ROS:

reactive oxygen species

SA:

salicylic acid

SOD:

superoxide dismutase

TBARS:

thiobarbituric acid reactive substances

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Authors and Affiliations

  1. Department of Horticulture, Zhejiang University, Hangzhou, 310029, P.R. China

    Y. He & Z. J. Zhu

  2. Department of Horticulture, Zhejiang Forestry University, Lin’an, Hangzhou, 311300, P.R. China

    Z. J. Zhu

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  1. Y. He
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  2. Z. J. Zhu
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Correspondence to Z. J. Zhu.

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He, Y., Zhu, Z.J. Exogenous salicylic acid alleviates NaCl toxicity and increases antioxidative enzyme activity in Lycopersicon esculentum . Biol Plant 52, 792–795 (2008). https://doi.org/10.1007/s10535-008-0155-8

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  • DOI: https://doi.org/10.1007/s10535-008-0155-8

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