BOKU - Universität für Bodenkultur Wien - Forschungsinformationssystem

Logo BOKU-Forschungsportal

Gewählte Publikation:

Seifert, GJ; Xue, H; Acet, T; .
(2014): The Arabidopsis thaliana FASCICLIN LIKE ARABINOGALACTAN PROTEIN 4 gene acts synergistically with abscisic acid signalling to control root growth.
Ann Bot. 2014; 114(6):1125-1133 FullText FullText_BOKU

Background and Aims The putative FASCICLIN-LIKE ARABINOGALACTAN PROTEIN 4 (At-FLA4) locus of Arabidopsis thaliana has previously been shown to be required for the normal growth of wild-type roots in response to moderately elevated salinity. However, the genetic and physiological pathway that connects At-FLA4 and normal root growth remains to be elucidated. Methods The radial swelling phenotype of At-fla4 was modulated with growth regulators and their inhibitors. The relationship of At-FLA4 to abscisic acid (ABA) signalling was analysed by probing marker gene expression and the observation of the At-fla4 phenotype in combination with ABA signalling mutants. KeyResults Application of ABA suppresses the non-redundant role of At-FLA4 in the salt response. At-FLA4 positively regulates the response to low ABA concentration in roots and is required for the normal expression of ABA- and abiotic stress-induced genes. The At-fla4 phenotype is enhanced in the At-abi4 background, while two genetic suppressors of ABA-induced gene expression are required for salt oversensitivity of At-fla4. Salt oversensitivity in At-fla4 is suppressed by the CYP707A inhibitor abscinazole E2B, and salt oversensitivity in At-fla4 roots is phenocopied by chemical inhibition of ABA biosynthesis. Conclusions The predicted lipid-anchored glycoprotein At-FLA4 positively regulates cell wall biosynthesis and root growth by modulating ABA signalling.
Autor*innen der BOKU Wien:
Seifert Georg
Xue Hui
Find related publications in this database (using NML MeSH Indexing)
Abscisic Acid/metabolism*;Arabidopsis/drug effects;Arabidopsis/genetics*;Arabidopsis/physiology;Arabidopsis Proteins/genetics;Arabidopsis Proteins/metabolism;Cell Wall/metabolism;Cytochrome P-450 Enzyme System/drug effects;Gene Expression Regulation, Plant*;Models, Genetic;Mucoproteins/genetics*;Mucoproteins/metabolism;Mutation;Phenotype;Plant Growth Regulators/metabolism*;Plant Proteins/genetics;Plant Proteins/metabolism;Plant Roots/growth & development;Plants, Genetically Modified;Signal Transduction*;Sodium Chloride/pharmacology;Stress, Physiological;Triazoles/pharmacology;

Find related publications in this database (Keywords)
arabinogalactan protein
root growth
cell wall
abscisic acid
plant cell wall signalling
Arabidopsis thaliana

© BOKU Wien Impressum