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Related Concept Videos

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.
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Food spoilage is caused by microbial growth or by chemical and physical changes, all of which affect the taste, texture, and safety of food.Temperature-Based PreservationRefrigeration at 0–4 °C slows microbial growth and enzyme activity, making it ideal for short-term storage. However, certain spoilage organisms—such as psychrotrophs like Listeria monocytogenes—can still proliferate at these temperatures. Freezing below -18 °C further slows biological processes by forming ice crystals, which...
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The oxidation of an organic compound in the presence of air or oxygen is called autoxidation. For example, cumene reacts with oxygen to form hydroperoxide. Autoxidation involves initiation, propagation, and termination steps. Many organic compounds are susceptible to autoxidation—especially ethers in the presence of oxygen, which form hydroperoxides. Even though this reaction is slow, old ether bottles contain small amounts of peroxide, which leads to laboratory explosions during ether...
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The characteristics that enable us to distinguish one substance from another are called properties.

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Related Experiment Video

Updated: Jul 16, 2026

Fruit Volatile Analysis Using an Electronic Nose
11:02

Fruit Volatile Analysis Using an Electronic Nose

Published on: March 30, 2012

Fruit ripening phenomena--an overview.

V Prasanna1, T N Prabha, R N Tharanathan

  • 1Department of Biochemistry and Nutrition, Central Food Technological Research Institute. Mysore, Karnataka, 570020. India.

Critical Reviews in Food Science and Nutrition
|March 17, 2007
PubMed
Summary

Fruit ripening involves complex biochemical changes, particularly in cell wall polysaccharides like pectins, leading to softening. Understanding these processes, driven by specific enzymes, can improve fruit quality and shelf life.

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Area of Science:

  • Plant Biochemistry
  • Food Science
  • Molecular Biology

Background:

  • Fruits are vital for nutrition, but short post-harvest life and ripening-related softening limit economic value.
  • Fruit ripening is a programmed process involving physiological, biochemical, and organoleptic changes.
  • Textural softening during ripening can lead to spoilage, impacting fruit quality.

Purpose of the Study:

  • To explore the biochemical mechanisms underlying fruit ripening, focusing on cell wall modifications.
  • To identify key enzymes and carbohydrate changes involved in fruit softening.
  • To highlight the potential of molecular biology in understanding and manipulating fruit ripening.

Main Methods:

  • Analysis of cell wall polysaccharide modifications during fruit ripening.
  • Investigating the role of carbohydrate depolymerization and specific enzymes.
  • Reviewing advances in molecular biology related to fruit ripening processes.

Main Results:

  • Carbohydrate depolymerization and changes in cell wall polysaccharides (starch, pectins, cellulose, hemicelluloses) are central to ripening.
  • Pectin degradation by enzymes like polygalacturonase and pectin methyl esterase significantly contributes to fruit tissue softening.
  • Molecular biology offers insights into the genetic control of ripening and potential for manipulation.

Conclusions:

  • Pectin structure and degradation are critical factors in fruit texture and quality.
  • Enzymatic breakdown of pectins is a primary cause of fruit softening.
  • Future research in molecular biology holds promise for enhancing fruit shelf life and quality.