Induction of Jasmonoyl-Isoleucine (JA-Ile)-Dependent JASMONATE ZIM-DOMAIN (JAZ) Genes in NaCl-Treated Arabidopsis thaliana Roots Can Occur at Very Low JA-Ile Levels and in the Absence of the JA/JA-Ile Transporter JAT1/AtABCG16

被引：12

作者：

Thurow, Corinna ^{[1
]}

Krischke, Markus ^{[2
]}

Mueller, Martin J. ^{[2
]}

Gatz, Christiane ^{[1
]}

机构：

[1] Univ Gottingen, Albrecht von Haller Inst Plant Sci, Dept Plant Mol Biol & Physiol, Julia Lermontowa Weg 3, D-37077 Gottingen, Germany

[2] Univ Wurzburg, Pharmaceut Biol, Julius von Sachs Inst Biosci, D-97082 Wurzburg, Germany

来源：

PLANTS-BASEL | 2020年 / 9卷 / 12期

关键词：

allene oxide synthase; CORONATINE INSENSITIVE 1; jasmonoyl-isoleucine; JA/JA-Ile transport protein JAT1; roots; salt; SALT STRESS-RESPONSE; TRANSCRIPTION FACTORS; ETHYLENE; EXPRESSION; PATHWAYS; ACTIVATION; DEGRADATION; PERCEPTION; REPRESSORS; DROUGHT;

D O I：

10.3390/plants9121635

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

The plant hormone jasmonoyl-isoleucine (JA-Ile) is an important regulator of plant growth and defense in response to various biotic and abiotic stress cues. Under our experimental conditions, JA-Ile levels increased approximately seven-fold in NaCl-treated Arabidopsis thaliana roots. Although these levels were around 1000-fold lower than in wounded leaves, genes of the JA-Ile signaling pathway were induced by a factor of 100 or more. Induction was severely compromised in plants lacking the JA-Ile receptor CORONATINE INSENSITIVE 1 or enzymes required for JA-Ile biosynthesis. To explain efficient gene expression at very low JA-Ile levels, we hypothesized that salt-induced expression of the JA/JA-Ile transporter JAT1/AtABCG16 would lead to increased nuclear levels of JA-Ile. However, mutant plants with different jat1 alleles were similar to wild-type ones with respect to salt-induced gene expression. The mechanism that allows COI1-dependent gene expression at very low JA-Ile levels remains to be elucidated.

引用

页码：1 / 12

页数：12