Convergent pathways for lipochitooligosaccharide and auxin signaling in tobacco cells.
Proc Natl Acad Sci U S A
; 93(23): 13389-92, 1996 Nov 12.
Article
em En
| MEDLINE
| ID: mdl-11038524
ABSTRACT
Lipochitooligosaccharides (LCOs) are a novel class of plant growth regulators that activate in tobacco protoplasts the expression of AXI1, a gene implicated in auxin signaling. Transient assays with a chimeric P(AXI)-GUS expression plasmid revealed that the N-octadecenoylated monosaccharide GlcN has all structural requirements for a biological active glycolipid, whereas the inactive N-acylated GalN epimer inhibits LCO action. Specific inhibition of LCO and auxin action shows that both signals are transduced within the tobacco cell via separate pathways that converge at or before AXI1 transcription. Cytokinin is suggested to be a common effector of LCO and auxin signaling. We also show that activation of AXI1 correlates with growth factor-induced cell division.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Protoplastos
/
Lipopolissacarídeos
/
Regulação da Expressão Gênica de Plantas
/
Ácidos Indolacéticos
Tipo de estudo:
Prognostic_studies
Idioma:
En
Ano de publicação:
1996
Tipo de documento:
Article