English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/168883
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE
Exportar a otros formatos:


Beta-Cyanoalanine synthase action in root hair elongation is exerted at early steps of the root hair elongation pathway and is independent of direct cyanide inactivation of NADPH oxidase

AuthorsArenas-Alfonseca, Lucía CSIC ORCID; Gotor, Cecilia CSIC ORCID ; Romero, Luis C. CSIC ORCID CVN ; García, Irene CSIC ORCID
Root Hair
ß-Cyanoalanine Synthase
Arabidopsis thaliana
Issue Date2018
PublisherOxford University Press
CitationPlant and Cell Physiology 59: 1072- 1083 (2018)
AbstractIn Arabidopsis thaliana, cyanide is produced concomitantly with ethylene biosynthesis and is mainly detoxified by the ß-cyanoalanine synthase CAS-C1. In roots, CAS-C1 activity is essential to maintain a low level of cyanide for proper root hair development. Root hair elongation relies on polarized cell expansion at the growing tip, and we have observed that CAS-C1 locates in mitochondria and accumulates in root hair tips during root hair elongation, as shown by observing the fluorescence in plants transformed with the translational construct ProC1:CASC1-GFP, containing the complete CAS-C1 gene fused to GFP. Mutants in the SUPERCENTIPEDE (SCN1) gene, that regulate the NADPH oxidase RHD2/AtrbohC, are affected at the very early steps of the development of root hair that do not elongate and do not show a preferential localization of the GFP accumulation in the tips of the root hair primordia. Root hairs of mutants in CAS-C1 or RHD2/AtrbohC, which catalyzes the generation of ROS and the Ca2+ gradient, correctly start to grow out but they do not elongate either. Genetic crosses between the cas-c1 mutant and scn1 or rhd2 mutants were performed and the detail phenotypic and molecular characterization of the double mutants demonstrate that scn1 mutation is epistatic to cas-c1 and cas-c1 is epistatic to rhd2 mutation, indicating that CAS-C1 acts in early steps of the root hair development process. Moreover, our results show that the role of CAS-C1 in root hair elongation is independent of H2O2 production and of a direct NADPH oxidase inhibition by cyanide
Identifiersdoi: 10.1093/pcp/pcy047
issn: 0032-0781
Appears in Collections:(IBVF) Artículos
Files in This Item:
File Description SizeFormat 
Arenas-Alfonseca et al-pcy047.pdf1,7 MBAdobe PDFThumbnail
Show full item record
Review this work

Related articles:

WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.