Salinity Effects on Morpho-Physiological and Yield Traits of Soybean (<i>Glycine max</i> L.) as Mediated by Foliar Spray with Brassinolide
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 N...
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MDPI AG
2021-03-01
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| Series: | Plants |
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| Online Access: | https://www.mdpi.com/2223-7747/10/3/541 |
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| author | Victoria Otie Idorenyin Udo Yang Shao Michael O. Itam Hideki Okamoto Ping An Egrinya A. Eneji |
| author_facet | Victoria Otie Idorenyin Udo Yang Shao Michael O. Itam Hideki Okamoto Ping An Egrinya A. Eneji |
| author_sort | Victoria Otie |
| collection | DOAJ |
| description | 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 (BL<sub>0</sub>), application at seedling (BL<sub>1</sub>), flowering (BL<sub>2</sub>), podding (BL<sub>3</sub>), seedling + flowering (BL<sub>4</sub>) and seedling + flowering + podding (BL<sub>5</sub>)) 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 (<i>p</i> ≤ 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 (<i>p</i> ≤ 0.05) increased with salinity. Foliar spray with BL significantly (<i>p</i> ≤ 0.05) improved the photosynthetic attributes, as well as nutrient partitioning, under stress, and alleviated ion toxicity by maintaining a favourable K<sup>+</sup>/Na<sup>+</sup> 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. |
| first_indexed | 2024-03-10T13:16:47Z |
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| publishDate | 2021-03-01 |
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| spelling | doaj.art-c407382e71e44863b10d637d3f6add462023-11-21T10:20:53ZengMDPI AGPlants2223-77472021-03-0110354110.3390/plants10030541Salinity Effects on Morpho-Physiological and Yield Traits of Soybean (<i>Glycine max</i> L.) as Mediated by Foliar Spray with BrassinolideVictoria Otie0Idorenyin Udo1Yang Shao2Michael O. Itam3Hideki Okamoto4Ping An5Egrinya A. Eneji6Department of Soil Science, Faculty of Agriculture, Forestry and Wildlife Resources Management, University of Calabar, Calabar P.M.B. 1115, NigeriaDepartment of Crop Science, Faculty of Agriculture, Forestry and Wildlife Resources Management, University of Calabar, Calabar P.M.B. 1115, NigeriaArid Land Research Centre, Tottori University, Hamasaka, Tottori 680-0001, JapanUnited Graduate School of Agricultural Sciences, Tottori University, Tottori 680-8553, JapanAgriculture Research Department, Hokkaido Research Organization, Hokkaido 060-0817, JapanArid Land Research Centre, Tottori University, Hamasaka, Tottori 680-0001, JapanDepartment of Soil Science, Faculty of Agriculture, Forestry and Wildlife Resources Management, University of Calabar, Calabar P.M.B. 1115, NigeriaSalinity 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 (BL<sub>0</sub>), application at seedling (BL<sub>1</sub>), flowering (BL<sub>2</sub>), podding (BL<sub>3</sub>), seedling + flowering (BL<sub>4</sub>) and seedling + flowering + podding (BL<sub>5</sub>)) 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 (<i>p</i> ≤ 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 (<i>p</i> ≤ 0.05) increased with salinity. Foliar spray with BL significantly (<i>p</i> ≤ 0.05) improved the photosynthetic attributes, as well as nutrient partitioning, under stress, and alleviated ion toxicity by maintaining a favourable K<sup>+</sup>/Na<sup>+</sup> 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.https://www.mdpi.com/2223-7747/10/3/541<i>Glycine max</i> (L.)saline stressbrassinolideantioxidantsarid regiondryland |
| spellingShingle | Victoria Otie Idorenyin Udo Yang Shao Michael O. Itam Hideki Okamoto Ping An Egrinya A. Eneji Salinity Effects on Morpho-Physiological and Yield Traits of Soybean (<i>Glycine max</i> L.) as Mediated by Foliar Spray with Brassinolide Plants <i>Glycine max</i> (L.) saline stress brassinolide antioxidants arid region dryland |
| title | Salinity Effects on Morpho-Physiological and Yield Traits of Soybean (<i>Glycine max</i> L.) as Mediated by Foliar Spray with Brassinolide |
| title_full | Salinity Effects on Morpho-Physiological and Yield Traits of Soybean (<i>Glycine max</i> L.) as Mediated by Foliar Spray with Brassinolide |
| title_fullStr | Salinity Effects on Morpho-Physiological and Yield Traits of Soybean (<i>Glycine max</i> L.) as Mediated by Foliar Spray with Brassinolide |
| title_full_unstemmed | Salinity Effects on Morpho-Physiological and Yield Traits of Soybean (<i>Glycine max</i> L.) as Mediated by Foliar Spray with Brassinolide |
| title_short | Salinity Effects on Morpho-Physiological and Yield Traits of Soybean (<i>Glycine max</i> L.) as Mediated by Foliar Spray with Brassinolide |
| title_sort | salinity effects on morpho physiological and yield traits of soybean i glycine max i l as mediated by foliar spray with brassinolide |
| topic | <i>Glycine max</i> (L.) saline stress brassinolide antioxidants arid region dryland |
| url | https://www.mdpi.com/2223-7747/10/3/541 |
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