Plant Soil Environ., 2017, 63(12):545-551 | DOI: 10.17221/665/2017-PSE

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

Guo-Qiang WU*,1, Hai-Long LIU1, Rui-Jun FENG1, Chun-Mei WANG2, Yong-Yong DU1
1 School of Life Science and Engineering, Lanzhou University of Technology, Lanzhou, Gansu, P.R. China
2 Lanzhou Institute of Husbandry and Pharmaceutical Science, Chinese Academy of Agricultural Sciences, Lanzhou, Gansu, P.R. China

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

Published: December 31, 2017  Show citation

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WU G, LIU H, FENG R, WANG C, DU Y. Silicon ameliorates the adverse effects of salt stress on sainfoin (Onobrychis viciaefolia) seedlings. Plant Soil Environ.. 2017;63(12):545-551. doi: 10.17221/665/2017-PSE.
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