Edinburgh, Scotland, United Kingdom - TAIR

Cytokinin signaling: Two-components and
more
Cytokinins have been implicated in a wide variety of plant growth and
development processes and have been shown to interact with various other
signals. Recent studies have demonstrated that cytokinin signal transduction
occurs through a classic bacterial two-component signaling system, in which
signal propagation relies on the transfer of phosphates between alternating
histidine and aspartic acid residues. Genes encoding proteins corresponding to
each of these two-component elements have been identified in Arabidopsis.
Using molecular, genetic and biochemical approaches, the roles of the
Arabidopsis two-component genes in plant growth and development have been
defined. There is extensive functional redundancy in these gene families.
Analysis of lines harboring multiple disruptions in multiple two-component genes
has indicated that these elements play roles in various signaling pathways. The
effect of these loss-of-function mutations on various aspects of growth and
development and on the response to environmental interactions will be
presented. We have also identified a number of transcription factors that are
regulated by cytokinin using a variety of approaches. The analysis of the role of
these transcription factors in cytokinin function will be discussed.
83
C32
Thursday 15:00 - 15:15
Plant Growth Regulators
Jayson Punwani
Argueso Cristiana
Fernando Ferreira
Jenn To
Joseph Kieber
Department of Biology
University of North Carolina
Chapel Hill
NC 27599-3280
USA