Effects of sodium benzoate on growth and physiological characteristics of wheat seedlings under compound heavy metal stress

doi:10.1016/S2095-3119(19)62723-1

Journal of Integrative Agriculture ›› 2020, Vol. 19 ›› Issue (4): 1010-1018.DOI: 10.1016/S2095-3119(19)62723-1

所属专题：麦类耕作栽培合辑Triticeae Crops Physiology · Biochemistry · Cultivation · Tillage

收稿日期:2018-12-07 出版日期:2020-04-01 发布日期:2020-03-04

Effects of sodium benzoate on growth and physiological characteristics of wheat seedlings under compound heavy metal stress

LIANG Pan-pan, ZHAO Chen, LIN Yuan, GENG Ji-jia, CHEN Yuan, CHEN De-hua, ZHANG Xiang

Key Laboratory of Crop Genetics and Physiology of Jiangsu Province/Agricultural College, Yangzhou University, Yangzhou 225009, P.R.China

Received:2018-12-07 Online:2020-04-01 Published:2020-03-04
Contact: Correspondence ZHANG Xiang, Tel/Fax: +86-514-87979357, E-mail: zhangxiang@yzu.edu.cn
About author:Received 7 December, 2018 Accepted 13 May, 2019 LIANG Pan-pan, Tel/Fax: +86-514-87979357, E-mail: 1474635982@qq.com;
Supported by:
The work was supported by the National Key Research and Development Program of China (2017YFD0201306), the National Natural Science Foundation of China (31671613, 31471435), the Ph D Programs Foundation of Jiangsu Province, China (1601116C), the Priority Academic Program Development of Jiangsu Higher Education Institutions, China, and the Top-Notch Academic Programs Project of Jiangsu Higher Education Institutions, China (PPZY2015A060).

摘要/Abstract

Abstract:

In this study, we investigated the effect of exogenous sodium benzoate on wheat seedlings (Yangmai 16) grown under heavy metal stress. The results showed that 2.4 mmol kg^–1 of heavy metals significantly inhibited growth and delayed emergence of wheat seedlings. Under compound heavy metal stress, application of 2–4 g L^–1 sodium benzoate significantly increased (P<0.01) chlorophyll content and chlorophyll fluorescence parameters F_v/F_m and F_v/F_o of wheat, compared to the control (water treatment). Further analysis showed that application of 2–4 g L^–1 sodium benzoate alleviated osmotic stress by promoting the accumulation of osmolytes such as soluble proteins and free proline, increased the activity of superoxide dismutase (SOD) and reduced malondialdehyde content (MDA). In contrast, higher concentrations of sodium benzoate solution (>6 g L^–1) inhibited the growth of wheat seedlings and even caused damage to seedlings. Correlation analysis showed that when the sodium benzoate concentration was in the range of 1.97–3.12 g L^–1 (2016) and 1.58–3.27 g L^–1 (2017), values of chlorophyll and its components, root activity, SOD activity, soluble protein, and free proline content were the highest. When the sodium benzoate concentration was raised to 2.59 g L^–1 (2016) or 3.02 g L^–1 (2017), MDA content was the lowest. Ultimately, exogenous sodium benzoate (2–4 g L^–1) facilitates root development and improves the root activity of wheat seedlings grown under compound heavy metals stress, thereby effectively alleviating the damage of compound heavy metal stress in wheat seedlings.

Key words: sodium benzoate , compound heavy metals , wheat seedlings , physiological characteristics

. [J]. Journal of Integrative Agriculture, 2020, 19(4): 1010-1018.

LIANG Pan-pan, ZHAO Chen, LIN Yuan, GENG Ji-jia, CHEN Yuan, CHEN De-hua, ZHANG Xiang. Effects of sodium benzoate on growth and physiological characteristics of wheat seedlings under compound heavy metal stress[J]. Journal of Integrative Agriculture, 2020, 19(4): 1010-1018.

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Effects of sodium benzoate on growth and physiological characteristics of wheat seedlings under compound heavy metal stress

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