Statocyte
Statocytes are gravity-sensing (gravitropic) cells in higher plants.[1] They contain amyloplasts-statoliths – starch-filled amyloplastic organelles – which sediment at the lowest part of the cells. Statocytes are present in the elongating region of coleoptiles, shoots and inflorescence stems. In roots, the root cap is the only place where sedimentation is observed, and only the central columella cells of the root cap serve as gravity-sensing statocytes.[2] They can initiate differential growth patterns, bending the root towards the vertical axis.[3]
References
- ^ D. Volkmann & M. Tewinkel for the European Space Agency (April 1997). "Position of Statoliths in Statocytes from Cress Roots under Changing Gravity Conditions". European Space Agency. Retrieved 2008-12-12.
- ^ van Loon, Jack J. W. A. (22 August 2007). "The Gravity Environment in Space Experiments". Biology in Space and Life on Earth (1 ed.). Wiley. pp. 17–32. ISBN 978-3-527-40668-5.
- ^ Neela Shiva Kumar, Martin Henry H. Stevens and John Z. Kiss (2008-02-01). "Plastid movement in statocytes of the arg1 (altered response to gravity) mutant". American Journal of Botany. Retrieved 2008-12-14.
See also
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