β-Cyclocitral is a conserved root growth regulator.

Published

Journal Article

Natural compounds capable of increasing root depth and branching are desirable tools for enhancing stress tolerance in crops. We devised a sensitized screen to identify natural metabolites capable of regulating root traits in Arabidopsis β-Cyclocitral, an endogenous root compound, was found to promote cell divisions in root meristems and stimulate lateral root branching. β-Cyclocitral rescued meristematic cell divisions in ccd1ccd4 biosynthesis mutants, and β-cyclocitral-driven root growth was found to be independent of auxin, brassinosteroid, and reactive oxygen species signaling pathways. β-Cyclocitral had a conserved effect on root growth in tomato and rice and generated significantly more compact crown root systems in rice. Moreover, β-cyclocitral treatment enhanced plant vigor in rice plants exposed to salt-contaminated soil. These results indicate that β-cyclocitral is a broadly effective root growth promoter in both monocots and eudicots and could be a valuable tool to enhance crop vigor under environmental stress.

Full Text

Duke Authors

Cited Authors

  • Dickinson, AJ; Lehner, K; Mi, J; Jia, K-P; Mijar, M; Dinneny, J; Al-Babili, S; Benfey, PN

Published Date

  • May 8, 2019

Published In

Volume / Issue

  • 116 / 21

Start / End Page

  • 10563 - 10567

PubMed ID

  • 31068462

Pubmed Central ID

  • 31068462

Electronic International Standard Serial Number (EISSN)

  • 1091-6490

International Standard Serial Number (ISSN)

  • 0027-8424

Digital Object Identifier (DOI)

  • 10.1073/pnas.1821445116

Language

  • eng