RRC ID 75816
Author Ichikawa M, Hirano T, Enami K, Fuselier T, Kato N, Kwon C, Voigt B, Schulze-Lefert P, Baluška F, Sato MH.
Title Syntaxin of plant proteins SYP123 and SYP132 mediate root hair tip growth in Arabidopsis thaliana.
Journal Plant Cell Physiol
Abstract Root hairs are fast-growing tubular protrusions on root epidermal cells that play important roles in water and nutrient uptake in plants. The tip-focused polarized growth of root hairs is accomplished by the secretion of newly synthesized materials to the tip via the polarized membrane trafficking mechanism. Here, we report the function of two different types of plasma membrane (PM) Qa-SNAREs (soluble N-ethylmaleimide-sensitive factor attachment protein receptors), SYP123 and SYP132, in the growth of root hair in Arabidopsis. We found that SYP123, but not SYP132, localizes in the tip region of root hairs by recycling between the brefeldin A (BFA)-sensitive endosomes and the PM of the expanding tip in an F-actin-dependent manner. The vesicle-associated membrane proteins VAMP721/722/724 also exhibited tip-focused localization in root hairs and formed ternary SNARE complexes with both SYP123 and SYP132. These results demonstrate that SYP123 and SYP132 act in a coordinated fashion to mediate tip-focused membrane trafficking for root hair tip growth.
Volume 55(4)
Pages 790-800
Published 2014-4-1
DOI 10.1093/pcp/pcu048
PII pcu048
PMID 24642714
MeSH Actins / metabolism Arabidopsis / drug effects Arabidopsis / growth & development* Arabidopsis / metabolism* Arabidopsis Proteins / metabolism* Brefeldin A / pharmacology Bridged Bicyclo Compounds, Heterocyclic / pharmacology Fluorescence Recovery After Photobleaching Green Fluorescent Proteins / metabolism Models, Biological Multiprotein Complexes / metabolism Mutation / genetics Phenotype Plant Roots / cytology Plant Roots / drug effects Plant Roots / growth & development* Protein Binding / drug effects Protein Transport / drug effects Qa-SNARE Proteins / metabolism* Recombinant Fusion Proteins / metabolism SNARE Proteins / metabolism Thiazolidines / pharmacology
IF 4.062
Arabidopsis / Cultured plant cells, genes pda06295