Microstructural and Enzymatic Contributions to Texture in High Pressure Processed Fruits and Vegetables

Area of Science:

• Food Science and Technology
• Agricultural Engineering

Background:

• High pressure processing (HPP) is widely used for beverages but poses challenges for whole fruits and vegetables due to texture degradation.
• Understanding HPP's impact on fruit and vegetable microstructure and enzymatic activity is crucial for expanding its application.

Purpose of the Study:

• To investigate the effects of HPP parameters (pressure, holding time, temperature) on the physical and chemical attributes influencing texture in non-beverage fruit and vegetable products.
• To explore enzymatic changes (pectin methylesterase, polygalacturonase activity) and their impact on pectin composition and degree of esterification.
• To examine texture recovery, HPP-assisted infusion techniques, and the role of isoenzymes and matrix environment.

Main Methods:

• Literature review of studies investigating HPP effects on fruit and vegetable texture.
• Quantitative measurement of texture attributes (hardness, springiness, cohesiveness, etc.).
• Analysis of microstructural changes and enzymatic activities (pectin methylesterase, polygalacturonase).

Main Results:

• HPP parameters significantly influence physical and chemical attributes related to texture in fruits and vegetables.
• Enzymatic activities and pectin modifications are affected by HPP, impacting overall texture.
• Texture can be maintained or improved through optimized HPP conditions and combined treatments.

Conclusions:

• High pressure processing (HPP) shows significant potential for application in whole fruit and vegetable products beyond the beverage industry.
• Careful control of HPP parameters and potential synergistic treatments can mitigate negative texture changes and even enhance product quality.
• Further research into HPP-assisted infusion and matrix effects can unlock new possibilities for texture optimization in plant-based foods.