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Non-canonical WOX11-mediated root branching contributes to plasticity in arabidopsis root system architecture

Authors :
Lin Xu
Yujuan Du
Ben Scheres
Xiaomei Hu
Lihong Sheng
Guifang Zhang
Hai Huang
Source :
Development, 144(17), 3126-3133, Development 144 (2017) 17
Publication Year :
2017

Abstract

Lateral roots (LRs), which originate from the growing root, and adventitious roots (ARs), which are formed from non-root organs, are main contributors to the post-embryonic root system in Arabidopsis. However, our knowledge of how the root system is plastically formed in response to diverse inductive cues is limited. Here we show that WOX11 contributes to root system plasticity. When seedlings are grown vertically on medium, WOX11 is not expressed in LR founder cells. During AR initiation, WOX11 is expressed in AR founder cells and activates LBD16. LBD16 also functions in LR formation and is activated in that context by ARF7/19 and not by WOX11. This indicates that divergent initial processes that lead to ARs and LRs may converge on the similar mechanism for primordium development. Furthermore, we demonstrated that when plants are grown in soil or upon wounding on medium, the primary root is able to produce both WOX11-mediated and non-WOX11-mediated roots. The discovery of WOX11-mediated root-derived roots reveals a previously uncharacterized pathway that confers plasticity during the generation of root system architecture in response to different inductive cues.

Details

Language :
English
ISSN :
09501991
Database :
OpenAIRE
Journal :
Development, 144(17), 3126-3133, Development 144 (2017) 17
Accession number :
edsair.doi.dedup.....40362616ec84ba7ee6d3a31d7942a2ca