🌷 Maturity and Ripening process
Maturity and Ripening process.
Ripening is a coordinated physiological process in which mature fruits develop desirable colour, flavour, texture, and aroma, but also move progressively toward senescence.
Maturity and Ripening Link
Maturity decides ripening performance. Properly mature fruits ripen normally, while immature or overmature fruits show quality and storability problems.
Climacteric and Non-Climacteric Fruits
Climacteric fruits show a marked rise in respiration and ethylene during ripening (for example banana, mango, apple, papaya, tomato).
Non-climacteric fruits do not show a strong climacteric rise and are generally harvested closer to edible ripeness (for example grape, citrus, pineapple, pomegranate, strawberry).
Major Biochemical Changes During Ripening
Cell wall components are solubilized, causing softening.
Starch is converted to sugars, increasing sweetness.
Organic acid levels decline in many fruits.
Chlorophyll degrades and carotenoids/anthocyanins develop, changing colour.
Volatile compounds increase and produce characteristic fruit aroma.
Ethylene and Respiration
Ethylene is a key ripening hormone in climacteric fruits and is synthesized from methionine pathway intermediates.
Rise in ethylene is associated with increased respiration, hydrolytic enzyme activity, and accelerated ripening progression.
Higher temperature generally increases respiration rate and speeds deterioration.
Chemical Interventions for Shelf Life
Shelf life can be managed using ethylene absorbents, antifungal treatments, growth regulator-based interventions, and atmosphere management.
Use should be crop-specific and protocol-based to avoid quality losses.
Summary Cheat Sheet
| Ripening attribute | Typical change |
|---|---|
| Texture | Softening due to cell wall breakdown |
| Taste | Sugar increase, acid decline |
| Colour | Chlorophyll loss, carotenoid/anthocyanin gain |
| Aroma | Volatile production increases |
| Physiology | Ethylene rise and respiration rise (climacteric fruits) |
| Fruit category | Examples |
|---|---|
| Climacteric | Banana, mango, apple, tomato, papaya |
| Non-climacteric | Citrus, grape, pineapple, pomegranate, strawberry |
References
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References
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