Differential regulation of jasmonate responses in multiple jaz mutants

Plant Signal Behav. 2022 Dec 31;17(1):1997240. doi: 10.1080/15592324.2021.1997240. Epub 2021 Nov 1.

Abstract

The phytohormones jasmonates (JAs) regulate diverse aspects of plant growth and defense responses. The JA-ZIM domain (JAZ) family of repressors are targeted by the JA receptor Coronatine Insensitive 1 for ubiquitination and subsequent degradation via the 26S proteasome. We previously investigated the functions of JAZs in JA responses by analyzing jaz mutants of the phylogenetic group I (jaz1/2/5/6), group II/III (jaz10/11/12), group IV/V (jaz3/4/7/9 and jaz3/4/7/8/9), and their high-order mutant jaz1/2/3/4/5/6/7/9/10/11/12. Here, we examined JA-regulated root growth, apical hook curvature, flowering time, and defense against the insect Spodoptera exigua in the intermediate jaz mutants jaz1/2/5/6/10/11/12, jaz1/2/3/4/5/6/7/9, and jaz3/4/7/8/9/10/11/12. This study shows that these jaz mutants differentially affect JA responses, suggesting the complexity of JA pathway in these multiple jaz mutants.

Keywords: JAZs; Jasmonate; defense; growth.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Arabidopsis Proteins* / genetics
  • Arabidopsis Proteins* / metabolism
  • Arabidopsis* / metabolism
  • Cyclopentanes / metabolism
  • Gene Expression Regulation, Plant / genetics
  • Oxylipins / metabolism
  • Phylogeny
  • Plants, Genetically Modified / metabolism
  • Repressor Proteins / genetics
  • Repressor Proteins / metabolism

Substances

  • Arabidopsis Proteins
  • Cyclopentanes
  • Oxylipins
  • Repressor Proteins
  • jasmonic acid

Grants and funding

The work was supported by the National Natural Science Foundation of China (31670315), the Beijing Municipal Natural Science Foundation (5172004), and Capacity Building for Sci-Tech Innovation-Fundamental Scientific Research Fund of Capital Normal University (01020530290047).