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Home | School Today | The Bioluminescence Phenomenon

The Bioluminescence phenomenon

Bioluminescence is light emitted by living things through chemical reactions in their bodies. Read on more about the phenomenon that takes place inside a living organism.

By Telangana Today
Published Date - 08:36 PM, Mon - 26 April 21
The Bioluminescence phenomenon
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Bioluminescence is the property of a living organism to produce and emit light. Animals, plants, fungi, and bacteria show bioluminescence. A remarkable diversity of marine animals and microbes are able to produce their own light. It is found in many marine organisms such as bacteria, algae, jellyfish, worms, crustaceans, sea stars, fish, and sharks.

Luminescence is generally higher in deep-living and planktonic organisms than in shallow species. Bioluminescence is a “cold light.” Cold light means less than 20% of the light generates thermal radiation or heat.

Bioluminescence in the Maldives

Most bioluminescent organisms are found in the ocean. These bioluminescent marine species include fish, bacteria, and jellies. Some bioluminescent organisms, including fireflies and fungi, are found on land. There are almost no bioluminescent organisms native to freshwater habitats.

Chemical reaction

The chemical reaction that results in bioluminescence requires two unique chemicals: luciferin and either luciferase or photoprotein. Luciferin is the compound that actually produces light. In a chemical reaction, luciferin is called the substrate. The bioluminescent color (yellow in fireflies, greenish in lanternfish) is a result of the arrangement of luciferin molecules.

Some bioluminescent organisms produce (synthesize) luciferin on their own. Dinoflagellates, for instance, bioluminescent in a bluish-green color. Bioluminescent dinoflagellates are a type of plankton—tiny marine organisms that can sometimes cause the surface of the ocean to sparkle at night.

Bioluminescence and people

Biologists and engineers are studying the chemicals and circumstances involved in bioluminescence to understand how people can use the process to make life easier and safer.

Green fluorescent protein (GFP)

Green fluorescent protein (GFP), for instance, is a valuable “reporter gene.” Reporter genes are chemicals (genes) that biologists attach to other genes they are studying. GFP reporter genes are easily identified and measured, usually by their fluorescence. This allows scientists to trace and monitor the activity of the studied gene—its expression in a cell, or its interaction with other chemicals.

Other uses are more experimental. Bioluminescent trees, for instance, could help light city streets and highways. This would reduce the need for electricity. Bioluminescent crops and other plants could luminesce when they needed water or other nutrients, or when they were ready to be harvested. This would reduce costs for farmers and agribusiness.


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