Petrášek J., Malínská K., Zažímalová E.
Transporters and Pumps in Plant Signaling. Series Signaling and Communication in Plants Vol. 7. Geisler M. Venema K. (eds.)
:
,
2010
Keywords:
Abstract:
The plant hormone auxin regulates many important aspects of plant
development from the early embryogenesis to the seed production. On genomic
and nongenomic levels, finely tuned auxin gradients form an important morphoregulatory
trigger. In planta, auxin is transported to long distances using symplastic
transport in the phloem. Besides, it is also a subject to the cell-to-cell transport,
being able to move across the plasma membrane (PM) by diffusion and/or utilizing
several types of auxin transporters. The role of the PM-localized auxin influx and
efflux carriers lies mainly in the fast directional transport of auxin across the PM
forming the basis for the establishment of developmentally significant auxin gradients.
In addition to PM-localized auxin transporters, there is also a population of
intracellular auxin transporters, which are probably involved in the regulation of
auxin homeostasis and thus in the control of availability of free auxin molecules.
This chapter summarizes recent knowledge on the types of auxin transporters, their
functional characterization, and involvement in developmental processes in plants.
IEB authors: Kateřina Malínská,
Jan Petrášek,
Eva Zažímalová
Čeština
English