Ethylene directs auxin to control root cell expansion.

Journal Article (Journal Article)

Root morphogenesis is controlled by the regulation of cell division and expansion. We isolated an allele of the eto1 ethylene overproducer as a suppressor of the auxin-resistant mutant ibr5, prompting an examination of crosstalk between the phytohormones auxin and ethylene in control of root epidermal cell elongation and root hair elongation. We examined the interaction of eto1 with mutants that have reduced auxin response or transport and found that ethylene overproduction partially restored auxin responsiveness to these mutants. In addition, we found that the effects of endogenous ethylene on root cell expansion in eto1 seedlings were partially impeded by dampening auxin signaling, and were fully suppressed by blocking auxin influx. These data provide insight into the interaction between these two key plant hormones, and suggest that endogenous ethylene directs auxin to control root cell expansion.

Full Text

Duke Authors

Cited Authors

  • Strader, LC; Chen, GL; Bartel, B

Published Date

  • December 2010

Published In

Volume / Issue

  • 64 / 5

Start / End Page

  • 874 - 884

PubMed ID

  • 21105933

Pubmed Central ID

  • PMC3735369

Electronic International Standard Serial Number (EISSN)

  • 1365-313X

International Standard Serial Number (ISSN)

  • 0960-7412

Digital Object Identifier (DOI)

  • 10.1111/j.1365-313x.2010.04373.x


  • eng