Physiological performance of soybean germination and seedling growth under salinity stress

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One of the most widespread agricultural problems in arid and semiarid regions is soil salinity. Soybean is one of the most important fabaceae plants. The objectives of this investigation were concentrated on the influence of three saline concentrations (Control, 25 and 50 mM NaCl) on some physiological parameters during germination and seedling stage of five soybean cultivars. The results were revealed a large variability within cultivars for salt tolerance at the early growth stages. Germination percentages, chlorophyll content, leaf number and plant height were significantly reduced with increasing salinity concentrations. The Japanese cultivar (TSU) and Egyptian cultivar (Giza-111) was less affected by salinity stress than other cultivars. Also, TSU and Giza -111 maintained a higher germination percent, dry weight and relative water content than other cultivars with increasing of salinity concentrations. Salinity stress induced a significant increase in seedling tissue sodium (Na+) in all cultivars. However, TSU and Giza-111 maintained lower Na+ both higher potassium (K+) and proline accumulated at the higher saline conditions than other cultivars. In this study, exhibited higher levls of tolerance to salinity compared to the other cultivars during germination and seedling stage.

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Salinity , Germination , Proline , Sodium , Potassium

dicle university journal of institute of natural and applied science

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dicle university journal of institute of natural and applied science