title: bor1-1, an Arabidopsis thaliana mutant that requires a high level of boron.
abstract: bor1-1 (high boron requiring), an Arabidopsis thaliana mutant that requires a high level of B, was isolated. When the B concentration in the medium was reduced to 3 microM, the expansion of rosette leaves was severely affected in bor1-1 but not in wild-type plants. In a medium containing 30 microM B the mutant grew normally but showed female sterility, whereas the wild type was able to set seeds. These defects of the bor1-1 mutant were not detected with supplementation of 100 microM B. In vivo concentrations of B in bor1-1 mutants were lower than those of the wild type, especially in the inflorescence stems. Tracer experiments using 10B suggested that the mutant has defects in uptake and/or translocation of B. The mutation was mapped on the lower arm of chromosome 2.
authors.affiliation: Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, University of Tokyo, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Noguchi
authors.forename: M
authors.initials: M
authors.lastname: Yasumori
authors.forename: T
authors.initials: T
authors.lastname: Imai
authors.forename: S
authors.initials: S
authors.lastname: Naito
authors.forename: T
authors.initials: T
authors.lastname: Matsunaga
authors.forename: H
authors.initials: H
authors.lastname: Oda
authors.forename: H
authors.initials: H
authors.lastname: Hayashi
authors.forename: M
authors.initials: M
authors.lastname: Chino
authors.forename: T
authors.initials: T
authors.lastname: Fujiwara
mesh_terms: D017360:Arabidopsis / Q000235:genetics* / Q000254:growth & development / Q000378:metabolism; D001895:Boron / Q000378:metabolism*; D008040:Genetic Linkage; D009154:Mutation
chemical_list: D001895:Boron