cyclosis


cyclosis

cyclosis (sīklō´sĬs), streaming of cytoplasm within a living cell without deformation of the external cell membrane. In some plant cells there is a rapid rotatory cytoplasmic movement, which is limited to the peripheral parts of the cell next to the cell wall; chloroplasts and granules move in this stream. This movement may be increased by light, and is dependent on temperature and pH. Auxins, or growth hormones, may also increase the rate of movement. Specialized cell components, microtubules, may direct the flow or may serve as a framework upon which the streaming occurs. Examples of cells in which cyclosis can be seen are the leaf cells of small aquatic plants, such as Elodea, and root hair cells of many plants. In some protozoans, e.g., the ciliates, slower cyclotic movements transport digestive vacuoles through the cell body.

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"cyclosis." The Columbia Encyclopedia, 6th ed.. 2014. Encyclopedia.com. 17 Dec. 2014 <http://www.encyclopedia.com>.

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cyclosis

cyclosis A type of cytoplasmic streaming in which the organelles circulate within the cell cytoplasm (e.g. in the passage of food vacuoles in Ciliatea).

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MICHAEL ALLABY. "cyclosis." A Dictionary of Zoology. 1999. Encyclopedia.com. 17 Dec. 2014 <http://www.encyclopedia.com>.

MICHAEL ALLABY. "cyclosis." A Dictionary of Zoology. 1999. Encyclopedia.com. (December 17, 2014). http://www.encyclopedia.com/doc/1O8-cyclosis.html

MICHAEL ALLABY. "cyclosis." A Dictionary of Zoology. 1999. Retrieved December 17, 2014 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O8-cyclosis.html

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cyclosis

cyclosis The circulation of protoplasm within a cell; the protoplasm moves at about 1–5cm/h. See also CYTOPLASMIC STREAMING.

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MICHAEL ALLABY. "cyclosis." A Dictionary of Plant Sciences. 1998. Encyclopedia.com. 17 Dec. 2014 <http://www.encyclopedia.com>.

MICHAEL ALLABY. "cyclosis." A Dictionary of Plant Sciences. 1998. Encyclopedia.com. (December 17, 2014). http://www.encyclopedia.com/doc/1O7-cyclosis.html

MICHAEL ALLABY. "cyclosis." A Dictionary of Plant Sciences. 1998. Retrieved December 17, 2014 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O7-cyclosis.html

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