Dictionary > Osmotrophy


The process of taking in of dissolved organic compounds that are absorbed into the cells via extracellular digestions for nutrition.
The organisms that used osmotrophy are known to be an osmotrophs which are usually found in protists and fungi although exclusively osmotrophic feeding in contemporary ecosystems are restricted to microscopic bacteria thereby used the process of osmosis for the movement of food although some macroscopic animals like molluscs, sponges, corals, brachiopods and echinoderms used osmotrophic feeding as supplemental food source.
Osmotrophy is an efficient means of gathering nutrients in microscopic organisms that relies on the surface area to ensure that proper diffusion occurs throughout the cell. When organisms increased in size the surface area per volume ratio drops and osmotrophy becomes insufficient to meet the nutrient demands.
In stagnant waters photoautotrophs has a relative advantage over heterotrophic osmotrophs since the flux of photon as energy source is not hindered at low temperatures thus, it depend on diffusion for mass acquisition through Brownian diffusion.
The fluid motion of osmotrophs is an impenetrable importance because asymptotic reactions occurs in the absence of fluid motion, thus movement bring closer to the cell that correspond to the highest gradients though diffusional core is safe on average concentrations.
See also:
• autotrophy
• heterotrophy
• phototrophy
• mixotrophy
Related terms:
• osmotrophic (adjective)

You will also like...

Darwin's Finches - Natural Selection
Darwin and Natural Selection

This tutorial investigates the genetic diversity in more detail. It also delineates how certain alleles are favored over..

Wart-like leaf galls on grape leaves
Plant Cell Defense

Plants protect themselves by releasing hydrogen peroxide to fight against fungal invasion. Another way is by secreting c..

Plant meristem
Plant Meristems and Growth

In plants, growth occurs in meristems, which are the site of repeated cell division of unspecialized cells. These cells ..

Principles of Hormonal Control Systems
Principles of Hormonal Control Systems

Hormones are essential in the regulation of the activity of the various biological systems of the human body. The ineffi..

temperature - abiotic factor
Abiotic and Biotic Factors

This tutorial deals with the abiotic factors of the freshwater environment that determine what sort of life would be sui..


Stems primarily provide plants structural support. This tutorial includes lectures on the external form of a woody twig ..

Related Articles...

No related articles found

See all Related Topics