Dictionary > Alkaliphile

Alkaliphile

Definition
noun, plural: alkaliphiles
An organism that can live and thrive in an alkaline environment
Supplement
An alkaliphile is an organism that can live and thrive in an alkaline environment, i.e. with pH ranging from 8.5 to 11. Examples of an alkaline environment are the Soda Lake in Carrizo Plain National Monument, California, the Octopus Spring located in Yellowstone National Park, and the Mono Lake in California’s Eastern Sierra. Carbonate-rich soils are also a typical habitat of alkaliphiles.
Alkaliphiles are able to survive in an alkaline environment because of a membrane system that actively pumps H+ across the cell membrane into their cytoplasm and therefore able to maintain pH of about 8.0.1 Others have evolved pH stable enzymes that help them survive an alkaline environment.
Alkaliphiles may be grouped according to their alkalinity requirement for growth and survival:

  • obligate alkaliphiles, i.e. those requiring high pH
  • facultative alkaliphiles, i.e. those that can survive in both alkaline and normal conditions
  • haloalkaliphiles, i.e. those requiring high salt content for survival

Examples of alkaliphiles are Anabaena sp. and Microcystis sp., which are blue-green algal species.
Also called:

  • alkalinophile
  • alkalophile

See also:

  • acidophile
  • extremophile
  • pH
  • Reference(s):

    1 alkaliphile. (n.d.) Segen’s Medical Dictionary. (2011). Retrieved from ://medical-dictionary.thefreedictionary.com/alkaliphile.


    You will also like...

    Photosynthesis and respiration
    Plant Metabolism

    Plants are responsible for incredible feats of molecular transformation. Plant processes, such as photosynthesis, photop..

    Lentic community
    Freshwater Communities & Lentic Waters

    Lentic or still water communities can vary greatly in appearance -- from a small temporary puddle to a large lake. The s..

    DNA carries genes coding for proteins
    Genetic Information and Protein Synthesis

    Genes are expressed through the process of protein synthesis. This elaborate tutorial provides an in-depth review of the..

    Bryophytes
    Bryophytes

    Bryophytes (nonvascular plants) are a plant group characterized by lacking vascular tissues. They include the mosses, th..

    Gibberellins and Gibberellic Acid
    Gibberellins and Gibberellic Acid

    This tutorial describes the role of gibberellin family in plants. Find out the effects of gibberellin on plant growth an..

    Freshwater lake ecosystem
    Freshwater Producers and Consumers

    Freshwater ecosystem is comprised of four major constituents, namely elements and compounds, plants, consumers, and deco..

    Related Articles...

    No related articles found

    See all Related Topics