Why do vegetables and fruits remain fresh for a few days when kept in refrigerator?

Refrigerators help vegetables and fruits stay fresh for several days by slowing down the processes that cause them to spoil. Here's how:

1. Reduced Temperature:

* Slows Down Respiration: The lower temperature reduces the rate of respiration, which is the process where fruits and vegetables break down sugars for energy. This process generates heat and releases gases like ethylene, which can accelerate ripening and decay.

* Slows Down Enzyme Activity: Enzymes are proteins that drive chemical reactions within cells. Cold temperatures slow down these enzymes, which are responsible for breaking down cell structures and causing spoilage.

2. Reduced Water Loss:

* Slows Down Transpiration: Cold temperatures slow down the rate of transpiration, which is the process where water evaporates from the surface of fruits and vegetables. This helps them retain moisture and prevents them from drying out and wilting.

3. Reduced Microbial Growth:

* Inhibits Bacteria and Fungi: Most bacteria and fungi that cause spoilage thrive at warmer temperatures. The cold environment in a refrigerator slows down their growth and reduces the risk of contamination.

4. Controlled Ethylene Levels:

* Reduces Ripening: Ethylene is a gas naturally produced by fruits and vegetables during ripening. Refrigerators help maintain lower ethylene levels, slowing down the ripening process and extending shelf life.

Important Note:

While refrigeration extends the shelf life of fruits and vegetables, it's not a magic solution. The freshness and quality still deteriorate over time. It's crucial to:

* Store Properly: Store fruits and vegetables in the appropriate compartments of the refrigerator, often in crisper drawers.

* Choose Fresh Produce: Start with fruits and vegetables that are already fresh and without blemishes.

* Wash Before Storage: Wash fruits and vegetables before storing them to remove dirt and microorganisms.

* Don't Overcrowd: Avoid overcrowding the refrigerator, which can make it harder for cold air to circulate and maintain optimal temperatures.

By understanding how refrigeration works, you can maximize the freshness and longevity of your fruits and vegetables.