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Directional cell expansion — turning toward actin

Journal Article · · Current Opinion in Plant Biology
 [1];  [1]
  1. University of Massachusetts, Amherst, MA (United States)

Significant recent progress toward understanding directional expansion in diffusely growing plant cells concerns actin. Tools for imaging actin, including both live-cell reporters and fixation protocols, have been improved. Proteins that interact with actin have been identified and their functions probed biochemically and genetically. Specifically, members of the actin-related protein2/3 (ARP2/3) complex and the Wiskott–Aldrich syndrome Verprolin-homologous (WAVE) complex have been identified. These proteins have salient functions in shaping trichomes and leaf pavement cells. Additionally, two targets of a rho-of-plants (ROP) G-protein have been discovered that exert opposing regulatory action on actin and microtubules, a pathway that appears to be responsible for establishing the undulating shapes of pavement cells. Lastly, several mutants of the fragile fiber class have revealed a link between actin organization, cell wall synthesis, and phosphoinositol signaling

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:
2483287
Journal Information:
Current Opinion in Plant Biology, Journal Name: Current Opinion in Plant Biology Journal Issue: 6 Vol. 8; ISSN 1369-5266
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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