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

Please always quote using this URN: urn:nbn:de:bvb:20-opus-219382
  • 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 enzymesThe 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.show moreshow less

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Metadaten
Author: Corinna Thurow, Markus Krischke, Martin J. Mueller, Christiane Gatz
URN:urn:nbn:de:bvb:20-opus-219382
Document Type:Journal article
Faculties:Fakultät für Biologie / Julius-von-Sachs-Institut für Biowissenschaften
Language:English
Parent Title (English):Plants
ISSN:2223-7747
Year of Completion:2020
Volume:9
Issue:12
Article Number:1635
Source:Plants (2020) 9:12, 1635. https://doi.org/10.3390/plants9121635
DOI:https://doi.org/10.3390/plants9121635
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 58 Pflanzen (Botanik) / 580 Pflanzen (Botanik)
Tag:CORONATINE INSENSITIVE 1; JA/JA-Ile transport protein JAT1; allene oxide synthase; jasmonoyl-isoleucine; roots; salt
Release Date:2022/08/12
Date of first Publication:2020/11/24
Licence (German):License LogoCC BY: Creative-Commons-Lizenz: Namensnennung 4.0 International