Anchorene is a Carotenoid-derived Regulatory Metabolite Required for Anchor Root Formation in

Overview

Journal Sci Adv

Specialties Biology
Science

Date 2019 Dec 7

PMID 31807696

Citations 29

Authors

Kun-Peng Jia

Alexandra J Dickinson

Jianing Mi

Guoxin Cui

Ting Ting Xiao

Najeh M Kharbatia

Xiujie Guo

Erli Sugiono

Manuel Aranda

Ikram Blilou

Magnus Rueping

Philip N Benfey

Salim Al-Babili

Affiliations

Soon will be listed here.

Abstract

Anchor roots (ANRs) arise at the root-shoot junction and are the least investigated type of root. Here, we show that ANRs originate from pericycle cells in an auxin-dependent manner and a carotenogenic signal to emerge. By screening known and assumed carotenoid derivatives, we identified anchorene, a presumed carotenoid-derived dialdehyde (diapocarotenoid), as the specific signal needed for ANR formation. We demonstrate that anchorene is an metabolite and that its exogenous application rescues the ANR phenotype in carotenoid-deficient plants and promotes the growth of normal seedlings. Nitrogen deficiency resulted in enhanced anchorene content and an increased number of ANRs, suggesting a role of this nutrient in determining anchorene content and ANR formation. Transcriptome analysis and treatment of auxin reporter lines indicate that anchorene triggers ANR formation by modulating auxin homeostasis. Together, our work reveals a growth regulator with potential application to agriculture and a new carotenoid-derived signaling molecule.

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