共 49 条
Directional cell expansion - turning toward actin
被引:31
作者:

Bannigan, A
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机构:
Univ Massachusetts, Dept Biol, Amherst, MA 01003 USA Univ Massachusetts, Dept Biol, Amherst, MA 01003 USA

Baskin, TI
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h-index: 0
机构:
Univ Massachusetts, Dept Biol, Amherst, MA 01003 USA Univ Massachusetts, Dept Biol, Amherst, MA 01003 USA
机构:
[1] Univ Massachusetts, Dept Biol, Amherst, MA 01003 USA
关键词:
D O I:
10.1016/j.pbi.2005.09.002
中图分类号:
Q94 [植物学];
学科分类号:
071001 ;
摘要:
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. Finally, several mutants of the fragile fiber class have revealed a link between actin organization, cell wall synthesis, and phosphoinositol signaling.
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页码:619 / 624
页数:6
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