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

Thurow, Corinna; Krischke, Markus; Mueller, Martin J.; Gatz, Christiane

doi:10.3390/plants9121635

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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

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Department of Plant Molecular Biology and Physiology, Albrecht-von-Haller Institute for Plant Sciences, University of Göttingen, Julia-Lermontowa-Weg 3, 37077 Göttingen, Germany

Pharmaceutical Biology, Julius-von-Sachs-Institute for Biosciences, University of Würzburg, 97082 Würzburg, Germany

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Plants 2020, 9(12), 1635; https://doi.org/10.3390/plants9121635

Received: 25 October 2020 / Revised: 18 November 2020 / Accepted: 20 November 2020 / Published: 24 November 2020

(This article belongs to the Special Issue The Jasmonate Pathway: New Actors, Mechanisms and Impacts)

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Abstract

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. View Full-Text

Keywords: allene oxide synthase; CORONATINE INSENSITIVE 1; jasmonoyl-isoleucine; JA/JA-Ile transport protein JAT1; roots; salt

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Thurow, C.; Krischke, M.; Mueller, M.J.; Gatz, C. 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. Plants 2020, 9, 1635. https://doi.org/10.3390/plants9121635

AMA Style

Thurow C, Krischke M, Mueller MJ, Gatz C. 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. Plants. 2020; 9(12):1635. https://doi.org/10.3390/plants9121635

Chicago/Turabian Style

Thurow, Corinna, Markus Krischke, Martin J. Mueller, and Christiane Gatz. 2020. "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" Plants 9, no. 12: 1635. https://doi.org/10.3390/plants9121635

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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

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