The SABRE gene is required for normal cell expansion in Arabidopsis.
Regulated cell expansion is an important determinant of organ shape in higher plants. The sabre mutation results in abnormal cell expansion in Arabidopsis. There is a shift in the orientation of expansion evident primarily in root cortex cells. The SABRE gene has been cloned and found to encode a novel protein. Reduction of effective levels of the plant phytohormone ethylene through use of inhibitors and an insensitive mutant resulted in partial rescue of the sabre phenotype. This suggested that one of the roles of SABRE is to counter the action of ethylene in promoting radial expansion in plant cells.
Aeschbacher
R A
RA
Department of Biology, New York University, New York 10003.
Hauser
M T
MT
Feldmann
K A
KA
Benfey
P N
PN
D000595:Amino Acid Sequence; D017360:Arabidopsis / Q000235:genetics* / Q000502:physiology; D029681:Arabidopsis Proteins / Q000235:genetics* / Q000302:isolation & purification; D001483:Base Sequence; D002455:Cell Division / Q000235:genetics; D017343:Genes, Plant; D047908:Intracellular Signaling Peptides and Proteins / Q000235:genetics* / Q000302:isolation & purification; D008969:Molecular Sequence Data; D010940:Plant Proteins / Q000235:genetics* / Q000302:isolation & purification; D018517:Plant Roots / Q000502:physiology
D029681:Arabidopsis Proteins; C579713:HPS4 protein, Arabidopsis; D047908:Intracellular Signaling Peptides and Proteins; D010940:Plant Proteins