Format

Send to

Choose Destination
Mol Plant. 2019 Feb 4;12(2):185-198. doi: 10.1016/j.molp.2018.12.017. Epub 2018 Dec 27.

A Single JAZ Repressor Controls the Jasmonate Pathway in Marchantia polymorpha.

Author information

1
Department of Plant Molecular Genetics, Centro Nacional de Biotecnología, Consejo Superior de Investigaciones Científicas (CNB-CSIC), 28049 Madrid, Spain.
2
Genomics Unit, Centro Nacional de Biotecnología, Consejo Superior de Investigaciones Científicas (CNB-CSIC), 28049 Madrid, Spain.
3
Environmental Biology Department, University of Navarra, Navarre, Spain.
4
Graduate School of Biostudies, Kyoto University, Kyoto 606-8502, Japan.
5
Department of Plant Molecular Genetics, Centro Nacional de Biotecnología, Consejo Superior de Investigaciones Científicas (CNB-CSIC), 28049 Madrid, Spain. Electronic address: rsolano@cnb.csic.es.

Abstract

JAZ proteins are negative regulators of jasmonate responses, acting both as repressors of transcription factors and as co-receptors of JA-Ile. The high redundancy of JAZ genes in angiosperms has hindered the characterization of a complete depletion of JAZ function. Moreover, the recent discovery that dn-OPDA is the jasmonate ligand in Marchantia polymorpha demonstrates that JA-Ile is not the sole COI1/JAZ ligand in land plants and highlights the importance of studying JAZ co-receptors in bryophytes. Here, we have exploited the low gene redundancy of the liverwort M. polymorpha to characterize the single MpJAZ in this early diverging plant lineage. We clarify the phylogenetic history of the TIFY family, demonstrate that MpJAZ is the ortholog of AtJAZ with a conserved function, and characterize its repressor activity of dn-OPDA responses. Our results show that, consistent with previous findings in Arabidopsis, MpJAZ represses jasmonates biosynthesis, senescence, and plant defenses, and promotes cell growth and reproductive fitness, highlighting the power of studies in Marchantia.

KEYWORDS:

Hormone signaling; Jasmonate repressors; Marchantia; evolution; gene redundancy

PMID:
30594656
DOI:
10.1016/j.molp.2018.12.017

Supplemental Content

Full text links

Icon for Elsevier Science
Loading ...
Support Center