Silicon ameliorates the adverse effects of salt stress on sainfoin (Onobrychis viciaefolia) seedlings

Guo-Qiang Wu, Hai-Long Liu, Rui-Jun Feng, Chun-Mei Wang and Yong-Yong Du
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Guo-Qiang Wu: School of Life Science and Engineering, Lanzhou University of Technology, Lanzhou, Gansu, P.R. China
Hai-Long Liu: School of Life Science and Engineering, Lanzhou University of Technology, Lanzhou, Gansu, P.R. China
Rui-Jun Feng: School of Life Science and Engineering, Lanzhou University of Technology, Lanzhou, Gansu, P.R. China
Chun-Mei Wang: Lanzhou Institute of Husbandry and Pharmaceutical Science, Chinese Academy of Agricultural Sciences, Lanzhou, Gansu, P.R. China
Yong-Yong Du: School of Life Science and Engineering, Lanzhou University of Technology, Lanzhou, Gansu, P.R. China

Plant, Soil and Environment, 2017, vol. 63, issue 12, 545-551

Abstract: The objective of this study was to investigate whether the application of silicon (Si) ameliorates the detrimental effects of salinity stress on sainfoin (Onobrychis viciaefolia). Three-week-old seedlings were exposed to 0 and 100 mmol/L NaCl with or without 1 mmol/L Si for 7 days. The results showed that salinity stress significantly reduced plant growth, shoot chlorophyll content and root K+ concentration, but increased shoot malondialdehyde (MDA) concentration, relative membrane permeability (RMP) and Na+ concentrations of shoot and root in sainfoin compared to the control (no added Si and NaCl). However, the addition of Si significantly enhanced growth, chlorophyll content of shoot, K+ and soluble sugars accumulation in root, while it reduced shoot MDA concentration, RMP and Na+ accumulation of shoot and root in plants under salt stress. It is clear that silicon ameliorates the adverse effects of salt stress on sainfoin by limiting Na+ uptake and enhancing selectivity for K+, and by adjusting the levels of organic solutes. The present study provides physiological insights into understanding the roles of silicon in salt tolerance in sainfoin.

Keywords: sodium toxicity; compatible solutes; cell permeability; photosynthetic pigments (search for similar items in EconPapers)
Date: 2017
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Persistent link: https://EconPapers.repec.org/RePEc:caa:jnlpse:v:63:y:2017:i:12:id:665-2017-pse

DOI: 10.17221/665/2017-PSE

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