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Related Concept Videos

Tonicity in Plants00:53

Tonicity in Plants

Tonicity describes the capacity of a cell to lose or gain water. It depends on the quantity of solute that does not penetrate the membrane. Tonicity delimits the magnitude and direction of osmosis and results in three possible scenarios that alter the volume of a cell: hypertonicity, hypotonicity, and isotonicity. Due to differences in structure and physiology, tonicity of plant cells is different from that of animal cells in some scenarios.Plants and Hypotonic EnvironmentsUnlike animal cells,...
Fruit Development, Structure, and Function01:58

Fruit Development, Structure, and Function

Fruits form from a mature flower ovary. As seeds develop from the ovules contained within, the ovary wall undergoes a series of complex changes to form fruit. In some fruits, such as soybeans, the ovary wall dries; in other fruits, such as grapes, it remains fleshy. In some cases, organs other than the ovary contribute to fruit formation; such fruits are called accessory fruits.
Responses to Salt Stress02:02

Responses to Salt Stress

Salt stress—which can be triggered by high salt concentrations in a plant’s environment—can significantly affect plant growth and crop production by influencing photosynthesis and the absorption of water and nutrients.
Determining the pH of Salt Solutions04:08

Determining the pH of Salt Solutions

The pH of a salt solution is determined by its component anions and cations. Salts that contain pH-neutral anions and the hydronium ion-producing cations form a solution with a pH less than 7. For example, in ammonium nitrate (NH4NO3) solution, NO3− ions do not react with water whereas NH4+ ions produce the hydronium ions resulting in the acidic solution. In contrast, salts that contain pH-neutral cations and the hydroxide ion-producing anions form a solution with a pH greater than 7. For...
Tonicity in Plants01:20

Tonicity in Plants

Plant cells maintain appropriate osmotic balance in extreme conditions. For instance, plants in dry environments store water in vacuoles, limit the opening of their stoma, and have thick, waxy cuticles to prevent unnecessary water loss. Some species of plants that live in salty environments store salt in their roots. As a result, water osmosis occurs in the root from the surrounding soil.
Tonicity
Tonicity describes the capacity of a cell to lose or gain water depending on the solute...
Ionic Strength: Effects on Chemical Equilibria01:19

Ionic Strength: Effects on Chemical Equilibria

The addition of an inert ionic compound increases the solubility of a sparingly soluble salt. For example, adding potassium nitrate to a saturated solution of calcium sulfate significantly enhances the solubility of calcium sulfate. Le Châtelier's principle cannot predict this shift in the equilibrium. Instead, this could be explained in terms of changes in the effective concentration of the ions in solution in the presence of added inert salt.
In this solution, the primary cation—the calcium...

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Related Experiment Video

Updated: Jun 24, 2026

Controlled-release of Chlorine Dioxide in a Perforated Packaging System to Extend the Storage Life and Improve the Safety of Grape Tomatoes
07:07

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Published on: April 7, 2017

Effect of salinity on tomato fruit ripening.

Y Mizrahi1

  • 1Applied Research Institute, Ben-Gurion University of the Negev, Beer-Sheva 84120, Israel.

Plant Physiology
|April 1, 1982
PubMed
Summary
This summary is machine-generated.

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.

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Analysis of Effect of Compound Salt Stress on Seed Germination and Salt Tolerance Analysis of Pepper (Capsicum annuum L.)

Published on: November 30, 2022

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.