The Effect of Salinity Stress on Fruit Yield and Some Physical and Biochemical Characteristics of Strawberry (Fragaria ananassa Duch.) cv. “Camarosa”

Document Type : Research Article

Authors

Professor in Horticultural Sciences, Faculty of Agriculture, Bu-Ali Sina University, Hamedan

Abstract

Salinity is a major environmental stress, limiting plant growth and yield. Determining the extent of salinity tolerance in horticultural crops helps overcome the problem. In order to study the effects of salinity on yield and some physical and biochemical characteristics of strawberry “Camarosa”, an experiment was conducted in a greenhouse based on a completely randomized design with four replications. To trigger the salinity stress, half-strength Hoagland's solution containing 0, 7.5, 15, 30 and 45 mmol NaCl was applied for 45 d. The results showed that salinity stress significantly affected yield, fruit weight and number of fruits per plant. The highest yield, fruit weight and number of fruits per plant (106.46 g plant-1, 8.63 g and 12.25, respectively) were found in control plants and the lowest ones (54.51 g plant-1, 6.46 g and 8.31, respectively) were found in plants treated with 45 mmol NaCl. Salinity decreased RWC and chlorophyll content, and increased soluble carbohydrates and proline content. The amount of soluble proteins was 26.5% lower in plants treated with 45 mmol NaCl compared to controls. In total, fruit yield and most of the physical and biochemical characteristics of strawberry “Camarosa” in plants treated with NaCl to the level of15 mmol (EC=2.5 dS m-1) was not significantly different from those in controls (EC=1.2 dS m-1).

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Main Subjects


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