Mitochondrial beta-cyanoalanine synthase is essential for root hair formation in Arabidopsis thaliana

ABSTRACT: Cyanide is stoichiometrically produced as a co-product of the ethylene biosynthesis pathway, and it is detoxified by the b-cyanoalanine synthase enzyme. The molecular and phenotypical analysis of T-DNA insertional mutants of the mitochondrial b-cyanoalanine synthase CYS-C1 suggests that discrete accumulation of cyanide is not toxic for the plant and does not alter mitochondrial respiration rates, but does act as a strong inhibitor of root hair development. The cys-c1 null allele is defective in root hair formation and accumulates cyanide in root tissues. The root hair defect is phenocopied in wild type plants by the exogenous addition of cyanide to the growth medium and is reversed by the addition of hydroxocobalamin. Hydroxocobalamin not only recovers the root phenotype of the mutant, but

ORGANISM(S): Arabidopsis thaliana

SUBMITTER: Cecilia Gotor 

PROVIDER: E-GEOD-19242 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress