de.mpg.escidoc.pubman.appbase.FacesBean
English
 
Help Guide Disclaimer Contact us Login
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT

Released

Journal Article

EXO modifies sucrose and trehalose responses and connects the extracellular carbon status to growth

MPS-Authors
http://pubman.mpdl.mpg.de/cone/persons/resource/persons97275

Lisso,  J.
Brassinosteroids, Cooperative Research Groups, Max Planck Institute of Molecular Plant Physiology, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons97395

Schröder,  F.
Brassinosteroids, Cooperative Research Groups, Max Planck Institute of Molecular Plant Physiology, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons97308

Müssig,  C.
Brassinosteroids, Cooperative Research Groups, Max Planck Institute of Molecular Plant Physiology, Max Planck Society;

Locator
There are no locators available
Fulltext (public)

fpls-04-00219[1].pdf
(Any fulltext), 4MB

Supplementary Material (public)
There is no public supplementary material available
Citation

Lisso, J., Schröder, F., & Müssig, C. (2013). EXO modifies sucrose and trehalose responses and connects the extracellular carbon status to growth. Frontiers in plant science, 4. doi:10.3389/fpls.2013.00219.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0014-766D-6
Abstract
Plants have the capacity to adapt growth to changing environmental conditions. This implies the modulation of metabolism according to the availability of carbon (C). Particular interest in the response to the C availability is based on the increasing atmospheric levels of CO2. Several regulatory pathways that link the C status to growth have emerged. The extracellular EXO protein is essential for cell expansion and promotes shoot and root growth. Homologous proteins were identified in evolutionarily distant green plants. We show here that the EXO protein connects growth with C responses. The exo mutant displayed altered responses to exogenous sucrose supplemented to the growth medium. Impaired growth of the mutant in synthetic medium was associated with the accumulation of starch and anthocyanins, altered expression of sugar-responsive genes, and increased abscisic acid levels. Thus, EXO modulates several responses related to the C availability. Growth retardation on medium supplemented with 2-deoxy-glucose, mannose, and palatinose was similar to the wild type. Trehalose feeding stimulated root growth and shoot biomass production of exo plants whereas it inhibited growth of the wild type. The phenotypic features of the exo mutant suggest that apoplastic processes coordinate growth and C responses.