Journal
CURRENT OPINION IN PLANT BIOLOGY
Volume 7, Issue 6, Pages 694-700Publisher
CURRENT BIOLOGY LTD
DOI: 10.1016/j.pbi.2004.09.014
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Plant small GTPases belonging to the Rop, Arf, and Rab families are regulators of vesicle trafficking. Rop GTPases regulate actin dynamics and modulate H2O2 production in polar cell growth and pathogen defence. A candidate Rop GDP to Rob GTP exchange factor (RopGEF) SPIKE1 is involved in the morphogenesis of leaf epidermal cells. The ArfGEF GNOM regulates the endosomal recycling of the PIN proteins, which are involved in polar auxin transport. Intracellular localisation of small GTPases and functional studies using dominant mutant versions of Arf and Rab GTPases are defining novel plant-specific membrane compartments, especially those that participate in endosomal vesicle trafficking.
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