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A regulated auxin minimum is required for seed dispersal in Arabidopsis

Karim Sorefan, Thomas Girin, Sarah J. Liljegren, Karin Ljung, Pedro Robles, Carlos S. Galván-Ampudia, Remko Offringa, Jiri Friml UGent, Martin F. Yanofsky and Lars Østergaard (2009) Nature. 459(7246). p.583-586
abstract
Local hormone maxima are essential for the development of multicellular structures and organs. For example, steroid hormones accumulate in specific cell types of the animal fetus to induce sexual differentiation(1) and concentration peaks of the plant hormone auxin direct organ initiation and mediate tissue patterning(2-4). Here we provide an example of a regulated local hormone minimum required during organogenesis. Our results demonstrate that formation of a local auxin minimum is necessary for specification of the valve margin separation layer where Arabidopsis fruit opening takes place. Consequently, ectopic production of auxin, specifically in valve margin cells, leads to a complete loss of proper cell fate determination. The valve margin identity factor INDEHISCENT (IND) is responsible for forming the auxin minimum by coordinating auxin efflux in separation-layer cells. We propose that the simplicity of formation and maintenance make local hormone minima particularly well suited to specify a small number of cells such as the stripes at the valve margins.
Please use this url to cite or link to this publication:
author
organization
year
type
journalArticle (original)
publication status
published
subject
journal title
Nature
Nature
volume
459
issue
7246
pages
583 - 586
Web of Science type
Article
Web of Science id
000266370500042
JCR category
MULTIDISCIPLINARY SCIENCES
JCR impact factor
34.48 (2009)
JCR rank
1/48 (2009)
JCR quartile
1 (2009)
ISSN
0028-0836
DOI
10.1038/nature07875
language
English
UGent publication?
yes
classification
A1
copyright statement
I don't know the status of the copyright for this publication
id
705262
handle
http://hdl.handle.net/1854/LU-705262
date created
2009-06-19 12:10:51
date last changed
2009-06-29 14:42:19
@article{705262,
  abstract     = {Local hormone maxima are essential for the development of multicellular structures and organs. For example, steroid hormones accumulate in specific cell types of the animal fetus to induce sexual differentiation(1) and concentration peaks of the plant hormone auxin direct organ initiation and mediate tissue patterning(2-4). Here we provide an example of a regulated local hormone minimum required during organogenesis. Our results demonstrate that formation of a local auxin minimum is necessary for specification of the valve margin separation layer where Arabidopsis fruit opening takes place. Consequently, ectopic production of auxin, specifically in valve margin cells, leads to a complete loss of proper cell fate determination. The valve margin identity factor INDEHISCENT (IND) is responsible for forming the auxin minimum by coordinating auxin efflux in separation-layer cells. We propose that the simplicity of formation and maintenance make local hormone minima particularly well suited to specify a small number of cells such as the stripes at the valve margins.},
  author       = {Sorefan, Karim and Girin, Thomas and Liljegren, Sarah J. and Ljung, Karin and Robles, Pedro and Galv{\'a}n-Ampudia, Carlos S. and Offringa, Remko and Friml, Jiri and Yanofsky, Martin F. and {\O}stergaard, Lars},
  issn         = {0028-0836},
  journal      = {Nature},
  language     = {eng},
  number       = {7246},
  pages        = {583--586},
  title        = {A regulated auxin minimum is required for seed dispersal in Arabidopsis},
  url          = {http://dx.doi.org/10.1038/nature07875},
  volume       = {459},
  year         = {2009},
}

Chicago
Sorefan, Karim, Thomas Girin, Sarah J. Liljegren, Karin Ljung, Pedro Robles, Carlos S. Galván-Ampudia, Remko Offringa, Jiri Friml, Martin F. Yanofsky, and Lars Østergaard. 2009. “A Regulated Auxin Minimum Is Required for Seed Dispersal in Arabidopsis.” Nature 459 (7246): 583–586.
APA
Sorefan, K., Girin, T., Liljegren, S. J., Ljung, K., Robles, P., Galván-Ampudia, C. S., Offringa, R., et al. (2009). A regulated auxin minimum is required for seed dispersal in Arabidopsis. Nature, 459(7246), 583–586.
Vancouver
1.
Sorefan K, Girin T, Liljegren SJ, Ljung K, Robles P, Galván-Ampudia CS, et al. A regulated auxin minimum is required for seed dispersal in Arabidopsis. Nature. 2009;459(7246):583–6.
MLA
Sorefan, Karim, Thomas Girin, Sarah J. Liljegren, et al. “A Regulated Auxin Minimum Is Required for Seed Dispersal in Arabidopsis.” Nature 459.7246 (2009): 583–586. Print.