Intercourse between cell wall and cytoplasm exemplified by arabinogalactan proteins and cortical microtubules
Journal Article
·
· American Journal of Botany
- Plateforme de Recherche en Imagerie Cellulaire de Haute Normandie (PRIMACEN)–Université de Rouen, Mont Saint Aignan (France)
- University of Massachusetts, Amherst, MA (United States)
How does a plant cell sense and respond to the status of its cell wall? Intercourse between cell wall and cytoplasm has long been supposed to involve arabinogalactan proteins, in part because many of them are anchored to the plasma membrane. Disrupting arabinogalactan proteins has recently been shown to disrupt the array of cortical microtubules present just inside the plasma membrane, implying that microtubules and arabinogalactan proteins interact. In this article, we assess possibilities for how this interaction might be mediated. First, we consider microdomains in the plasma membrane (lipid rafts), which have been alleged to link internal and external regions of the plasma membrane; however, the characteristics and even the existence of these domains remains controversial. Next, we point out that disrupting the synthesis of cellulose also can disrupt microtubules and consider whether arabinogalactan proteins are part of a network linking microtubules and nascent microfibrils. Finally, we outline several signaling cascades that could transmit information from arabinogalactan proteins to microtubules through channels of cellular communication. Furthermore, these diverse possibilities highlight the work that remains to be done before we can understand how plant cells communicate across their membranes.
- Research Organization:
- University of Massachusetts, Amherst, MA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences & Biosciences Division (CSGB)
- Grant/Contract Number:
- FG02-03ER15421
- OSTI ID:
- 2483295
- Journal Information:
- American Journal of Botany, Journal Name: American Journal of Botany Journal Issue: 12 Vol. 95; ISSN 0002-9122
- Publisher:
- Wiley - Botanical Society of AmericaCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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