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2013 ; 2
(1
): 148-73
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gab.com Text
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English Wikipedia
Polar Expansion Dynamics in the Plant Kingdom: A Diverse and Multifunctional
Journey on the Path to Pollen Tubes
#MMPMID27137370
Domozych DS
; Fujimoto C
; LaRue T
Plants (Basel)
2013[Mar]; 2
(1
): 148-73
PMID27137370
show ga
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.