pln10(3)_plants10030541.pdf 1.98 MB
Otie, Victoria Department of Soil Science, Faculty of Agriculture, Forestry and Wildlife Resources Management, University of Calabar / Arid Land Research Centre, Tottori University
Udo, Idorenyin Department of Crop Science, Faculty of Agriculture, Forestry and Wildlife Resources Management, University of Calabar
Shao, Yang Arid Land Research Centre, Tottori University
Itam, Michael O. United Graduate School of Agricultural Sciences, Tottori University
岡元 英樹 Agriculture Research Department, Hokkaido Research Organization
Eneji, Egrinya A. Department of Soil Science, Faculty of Agriculture, Forestry and Wildlife Resources Management, University of Calabar
Glycine max (L.)
Salinity episodes that are common in arid regions, characterized by dryland, are adversely affecting crop production worldwide. This study evaluated the effectiveness of brassinolide (BL) in ameliorating salinity stress imposed on soybean at four levels (control (1.10), 32.40, 60.60 and 86.30 mM/L NaCl) in factorial combination with six BL application frequency (control (BL0), application at seedling (BL1), flowering (BL2), podding (BL3), seedling + flowering (BL4) and seedling + flowering + podding (BL5)) stages. Plant growth attributes, seed yield, and N, P, K, Ca and Mg partitioning to leaves, stems and roots, as well as protein and seed-N concentrations, were significantly (p ≤ 0.05) reduced by salinity stress. These trends were ascribed to considerable impairments in the photosynthetic pigments, photosynthetically active radiation, leaf stomatal conductance and relative water content in the leaves of seedlings under stress. The activity of peroxidase and superoxidase significantly (p ≤ 0.05) increased with salinity. Foliar spray with BL significantly (p ≤ 0.05) improved the photosynthetic attributes, as well as nutrient partitioning, under stress, and alleviated ion toxicity by maintaining a favourable K+/Na+ ratio and decreasing oxidative damage. Foliar spray with brassinolide could sustain soybean growth and seed yield at salt concentrations up to 60.60 mM/L NaCl.
（C） 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
Otie Victoria, Udo Idorenyin, Shao Yang, et al. Salinity Effects on Morpho-Physiological and Yield Traits of Soybean (Glycine max L.) as Mediated by Foliar Spray with Brassinolide. PLANTS-BASEL. 2021. 10(3). doi:10.3390/plants10030541
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