[Seminars] PSB event reminder
contact at psb.vib-ugent.be
contact at psb.vib-ugent.be
Tue May 10 09:10:01 CEST 2011
Calendar Name: seminars
Scheduled for: Tuesday, May 10 2011, 11:00 - 12:30
Event text: Dr Keiko Sugimoto
RIKEN Plant Science Center
Tsurumi, Yokohama
JAPAN
Details: Transcriptional control of plant cell dedifferentiation
by WIND1
ABSTRACT
Many multicellular organisms have a remarkable capacity
to regenerate new organs after wounding. As a first step
of organ regeneration, adult somatic cells often
dedifferentiate to reacquire cell proliferation
potential but mechanisms underlying this control remain
unknown in plants. We have recently shown that an
AP2/ERF transcription factor WOUND-INDUCED
DEDIFFERENTIATION 1 (WIND1) participates in the
regulation of cell dedifferentiation in Arabidopsis
(Iwase et al. 2011). WIND1 is rapidly induced at the
wound site and it promotes cell dedifferentiation and
subsequent formation of callus, a mass of pluripotent
cells. We further demonstrate that ectopic
overexpression of WIND1 is sufficient to establish and
maintain the dedifferentiated status of somatic cells
without exogenous auxin and cytokinin. An in vivo
imaging of a synthetic cytokinin reporter reveals that
wounding up-regulates the B-type ARABIDOPSIS RESPONSE
REGULATOR (ARR)-mediated cytokinin response and that
WIND1 acts via the ARR-dependent signaling pathway to
promote cell dedifferentiation. Discovery of WIND1
provides a new molecular basis to further dissect how
transcriptional regulators reprogram cellular
differentiation status in plants.
Iwase A et al. The AP2/ERF transcription factor WIND1
controls cell dedifferentiation in Arabidopsis. Curr
Biol 21: 508-514 (2011)
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