Work

The YUCCA-Auxin-WOX11 Module Controls Crown Root Development in Rice

Year: 2018

Type: article

Abstract: A well-developed root system in rice can ensure plants to efficiently absorb nutrients and water. Auxin is a key regulator for various aspect of root development, but the detailed molecular mechanism by which auxin controls crown root development in rice is not understood. Herein, we establish a YUC-Auxin-WOX11 module that plays a central role in regulating crown root initiation and growth in rice. We show that YUC overexpression causes massive proliferation of crown roots, a phenotype that is dependent on the presence of the transcription factor WOX11. On the other hand, we find that disruption of TAA1, which functions upstream of YUC genes, greatly reduces crown root development. Moreover, the crown rootless phenotype of taa1 mutants was rescued by overexpression of WOX11. We show that WOX11 expression is induced in OsYUC1 overexpression lines, but is repressed in the taa1 mutants. Our results indicate that auxin synthesized by the TAA/YUC pathway activates WOX11 transcription, which subsequently drives crown root initiation and development.

Source: Frontiers in Plant Science

DOI: 10.3389/fpls.2018.00523

Authors: Tao Zhang, Ruonan Li, Jialing Xing, Lang Yan, Rongchen Wang, Yunde Zhao

Institutions: Huazhong Agricultural University, University of California San Diego

Language: English

Topic: Plant Molecular Biology Research

Subfield: Plant Science

Field: Agricultural and Biological Sciences

Domain: Life Sciences

SDG: Zero hunger

Open Access status: gold

Estimated APC paid: $3,801