Universität zu Köln

Muench, Miriam, Hsin, Chih-Hsuan, Ferber, Elena, Berger, Susanne and Mueller, Martin J. (2016). Reactive electrophilic oxylipins trigger a heat stress-like response through HSFA1 transcription factors. J. Exp. Bot., 67 (21). S. 6139 - 6149. OXFORD: OXFORD UNIV PRESS. ISSN 1460-2431

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Abstract

Electrophilic oxylipins trigger a heat-shock-like response in the absence of heat through the canonical heat-shock transcription factor A1, thereby helping to cope with stresses associated with protein damage.Abiotic and biotic stresses are often characterized by an induction of reactive electrophile species (RES) such as the jasmonate 12-oxo-phytodienoic acid (OPDA) or the structurally related phytoprostanes. Previously, RES oxylipins have been shown massively to induce heat-shock-response (HSR) genes including HSP101 chaperones. Moreover, jasmonates have been reported to play a role in basal thermotolerance. We show that representative HSR marker genes are strongly induced by RES oxylipins through the four master regulator transcription factors HSFA1a, b, d, and e essential for short-term adaptation to heat stress in Arabidopsis. When compared with Arabidopsis seedlings treated at the optimal acclimation temperature of 37 A degrees C, the exogenous application of RES oxylipins at 20 A degrees C induced a much weaker induction of HSP101 at both the gene and protein expression levels which, however, was not sufficient to confer short-term acquired thermotolerance. Moreover, jasmonate-deficient mutant lines displayed a wild-type-like HSR and were not compromised in acquiring thermotolerance. Hence, the OPDA- and RES oxylipin-induced HSR is not sufficient to protect seedlings from severe heat stress but may help plants to cope better with stresses associated with protein unfolding by inducing a battery of chaperones in the absence of heat.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Muench, Miriam UNSPECIFIED UNSPECIFIED UNSPECIFIED Hsin, Chih-Hsuan UNSPECIFIED UNSPECIFIED UNSPECIFIED Ferber, Elena UNSPECIFIED UNSPECIFIED UNSPECIFIED Berger, Susanne UNSPECIFIED UNSPECIFIED UNSPECIFIED Mueller, Martin J. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-256784
DOI:	10.1093/jxb/erw376
Journal or Publication Title:	J. Exp. Bot.
Volume:	67
Number:	21
Page Range:	S. 6139 - 6149
Date:	2016
Publisher:	OXFORD UNIV PRESS
Place of Publication:	OXFORD
ISSN:	1460-2431
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language ARABIDOPSIS-THALIANA; SHOCK RESPONSE; 12-OXO-PHYTODIENOIC ACID; GENE-EXPRESSION; THERMOTOLERANCE; PLANTS; MODEL; DETOXIFICATION; ACQUISITION; ACTIVATION Multiple languages Plant Sciences Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/25678