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Published on: April 7, 2017
Effect of salinity on tomato fruit ripening
1Applied Research Institute, Ben-Gurion University of the Negev, Beer-Sheva 84120, Israel.
Plant Physiology
|April 1, 1982
Summary
Salt stress on tomato plants (Lycopersicon esculentum Mill) reduced fruit development time and size but improved taste. Higher salt concentrations negatively impacted fruit shelf life.
Area of Science:
- Horticulture
- Plant Physiology
- Agricultural Science
Background:
- Salinity is a major abiotic stress affecting crop production worldwide.
- Understanding the impact of salinity on fruit quality is crucial for agricultural sustainability.
Purpose of the Study:
- To investigate the effects of sodium chloride (NaCl) on tomato fruit development and quality.
- To analyze biochemical and physiological changes in tomato fruits under salt stress.
Main Methods:
- Tomato plants (Lycopersicon esculentum Mill) were treated with 3 or 6 g/L NaCl at anthesis.
- Fruit development time, size, and sensory attributes were evaluated.
- Biochemical analyses included dry weight, soluble solids, titratable acidity, sugars, ions, pigments, and electrical conductivity.
- Enzyme activities (pectin methyl esterase, polygalacturonases) and gas evolution (ethylene, CO2) during ripening were measured.
Main Results:
- Salinity significantly shortened tomato fruit development time (4-15%).
- Salt-treated fruits were smaller but exhibited enhanced taste, higher dry weight, soluble solids, titratable acidity, sugars, and electrical conductivity.
- Increased levels of Cl(-), Na(+), and pericarp pigments were observed in saline-treated fruits, with a lower pH.
- Ripening involved higher ethylene and CO2 evolution rates and increased pectinolytic enzyme activities.
- High salinity (6 g/L NaCl) considerably reduced fruit shelf life.
Conclusions:
- NaCl exposure alters tomato fruit development, leading to changes in composition and sensory characteristics.
- While salinity can enhance certain fruit quality attributes like taste and soluble solids, it also accelerates ripening and reduces shelf life.
- These findings provide insights into managing salinity stress for optimizing tomato fruit quality in agriculture.
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