Journal
CURRENT OPINION IN PLANT BIOLOGY
Volume 11, Issue 6, Pages 653-661Publisher
CURRENT BIOLOGY LTD
DOI: 10.1016/j.pbi.2008.08.005
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Funding
- Australian Research Council [DP0556217, DP0664626]
- Australian Research Council [DP0556217, DP0664626] Funding Source: Australian Research Council
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The formation of wall ingrowths increases plasma membrane surface areas of transfer cells involved in membrane transport of nutrients in plants. Construction of these ingrowths provides intriguing and diverse examples of localized wall deposition. Flange wall ingrowths resemble secondary wall thickenings of tracheary elements in morphology and probable mechanisms of deposition. By contrast, reticulate wall ingrowths, deposited as discrete papillate projections, branch and fuse to create a fenestrated wall labyrinth representing a novel form of localized wall deposition. Papillate wall ingrowths are initiated as patches of disorganized cellulosic material and are compositionally similar to primary walls, except for a surrounding layer of callose and enhanced levels of arabinogalactan proteins at the ingrowth/membrane interface. How this unusual form of localized wall deposition is constructed is unknown but may involve constraining cellulose-synthesizing rosette complexes at their growing tips.
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