Effects of Salinity Stress on the Growth, Physiology, and Yield of Soybean (Glycine max (L.) Merrill)

Vu Ngoc Thang,Nguyen Thi Linh,Le Thi Tuyet Cham

doi:10.31817/vjas.2021.4.2.05

Vu Ngoc Thang, Nguyen Thi Linh + Show 1 more

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https://doi.org/10.31817/vjas.2021.4.2.05

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Abstract

This study was conducted to evaluate the salt tolerance ability of two soybean cultivars under salinity conditions using a selection of growth and physiological parameters. Three weeks after germination, plants began being treated with either a 100 mM concentration of NaCl in Hoagland solution or a non-salinity (0 mM NaCl) solution. The results showed that the plant height, number of leaves, leaf area index, and shoot and root biomasses were significantly reduced under salt conditions. A similar tendency was observed in several physiological parameters (SPAD, Fv/Fm). Since all the salt-treated plants of the D8 cultivar were dead after 40 days under the 100 mM NaCl treatment, the yield of D8 could not be obtained, while the treated plants of the D140 cultivar experienced a marked decrease in yield compared to the control plants. In this study, we identified that the D140 soybean cultivar had a better salt tolerance than the D8 soybean cultivar at a 100 mM NaCl concentration.

Highlights

Soybean (Glycine max (L.) Merrill) is an important crop in terms of its wide usage as an edible oil and high-protein livestock feed (Valliyodan & Nguyen, 2008)
Soybean is a crop sensitive to salt stress which leads to reductions in yield (Luo et al, 2005)
The results indicated that the D140 and D8 cultivars scored the highest for salt tolerance and sensitivity, respectively

Summary

Introduction

Soybean (Glycine max (L.) Merrill) is an important crop in terms of its wide usage as an edible oil and high-protein livestock feed (Valliyodan & Nguyen, 2008). With a high content of proteins (4050%), lipids (20-30%), and carbohydrates (26-30%), and with more than 85% of the proteins consisting of β-conglycinin and glycinin (Gibbs et al, 2004), soybean and its products play important roles in providing nutrition for both humans and animals. Soybean biodiesel is being considered as one of the alternatives to fossil fuels for the future (Hill et al, 2006). With its relatively wide adaptability, is becoming a strategic crop in many countries around the world. Soybean is a salt-sensitive crop (Luo et al, 2005), as shown by high sensitivity to saline conditions.

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