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Even Single-Celled Organisms Feed Themselves in 'Smart' Manner

Category: Science & Technology
How does a single-celled organism, one of the simplest life forms on Earth, manage to satisfy its nutritional needs? It is by studying social amoebae, elementary organisms that are distantly related to fungi and plants, that Audrey Dussutour, CNRS researcher at the Centre de Recherche sur la Cognition Animale and her Australian collaborators have, for the first time, demonstrated the nutritional preferences of such systems.

Despite lacking a centralizing organ, such amoebae are capable of regulating their nutrient supply. When faced with diverse nutritional situations, they adapt so as always to select an optimal ratio of nutrients.

The results are published in the journal Proceedings of the National Academy of Sciences on 9 February 2010.

In most animals, nutrition involves components specialized in the regulation of nutritional supply and demand (in most animals, for example, the brain controls the needs of the body cells). However, certain organisms, such as fungi, have neither a specialized component nor a coordination center. How then do they maintain an optimal supply of the nutrients essential for their survival and reproduction?

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