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Plants 2013, 2(1), 148-173; doi:10.3390/plants2010148

Polar Expansion Dynamics in the Plant Kingdom: A Diverse and Multifunctional Journey on the Path to Pollen Tubes

Department of Biology and Skidmore Microscopy Imaging Center, Skidmore College, Saratoga Springs, New York, NY 12866, USA
Author to whom correspondence should be addressed.
Received: 28 December 2012 / Revised: 24 February 2013 / Accepted: 1 March 2013 / Published: 18 March 2013
(This article belongs to the Special Issue Pollen Tube Growth)
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Polar expansion is a widespread phenomenon in plants spanning all taxonomic groups from the Charophycean Green Algae to pollen tubes in Angiosperms and Gymnosperms. Current data strongly suggests that many common features are shared amongst cells displaying polar growth mechanics including changes to the structural features of localized regions of the cell wall, mobilization of targeted secretion mechanisms, employment of the actin cytoskeleton for directing secretion and in many cases, endocytosis and coordinated interaction of multiple signal transduction mechanisms prompted by external biotic and abiotic cues. The products of polar expansion perform diverse functions including delivery of male gametes to the egg, absorption, anchorage, adhesion and photo-absorption efficacy. A comparative analysis of polar expansion dynamics is provided with special emphasis on those found in early divergent plants. View Full-Text
Keywords: polar expansion; plants; cell wall; actin; Golgi; pectins polar expansion; plants; cell wall; actin; Golgi; pectins

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This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Domozych, D.S.; Fujimoto, C.; LaRue, T. Polar Expansion Dynamics in the Plant Kingdom: A Diverse and Multifunctional Journey on the Path to Pollen Tubes. Plants 2013, 2, 148-173.

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