Universität zu Köln

Sewelam, Nasser, Brilhaus, Dominik ORCID: 0000-0001-9021-3197, Braeutigam, Andrea, Alseekh, Saleh, Fernie, Alisdair R. and Maurino, Veronica G. (2020). Molecular plant responses to combined abiotic stresses put a spotlight on unknown and abundant genes. J. Exp. Bot., 71 (16). S. 5098 - 5113. OXFORD: OXFORD UNIV PRESS. ISSN 1460-2431

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Abstract

Environmental stresses such as drought, heat, and salinity limit plant development and agricultural productivity. While individual stresses have been studied extensively, much less is known about the molecular interaction of responses to multiple stresses. To address this problem, we investigated molecular responses of Arabidopsis to single, double, and triple combinations of salt, osmotic, and heat stresses. A metabolite profiling analysis indicated the production of specific compatible solutes depending on the nature of the stress applied. We found that in combination with other stresses, heat has a dominant effect on global gene expression and metabolite level patterns. Treatments that include heat stress lead to strongly reduced transcription of genes coding for abundant photosynthetic proteins and proteins regulating the cell life cycle, while genes involved in protein degradation are up-regulated. Under combined stress conditions, the plants shifted their metabolism to a survival state characterized by low productivity. Our work provides molecular evidence for the dangers for plant productivity and future world food security posed by heat waves resulting from global warming. We highlight candidate genes, many of which are functionally uncharacterized, for engineering plant abiotic stress tolerance.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Sewelam, Nasser UNSPECIFIED UNSPECIFIED UNSPECIFIED Brilhaus, Dominik UNSPECIFIED orcid.org/0000-0001-9021-3197 UNSPECIFIED Braeutigam, Andrea UNSPECIFIED UNSPECIFIED UNSPECIFIED Alseekh, Saleh UNSPECIFIED UNSPECIFIED UNSPECIFIED Fernie, Alisdair R. UNSPECIFIED UNSPECIFIED UNSPECIFIED Maurino, Veronica G. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-323763
DOI:	10.1093/jxb/eraa250
Journal or Publication Title:	J. Exp. Bot.
Volume:	71
Number:	16
Page Range:	S. 5098 - 5113
Date:	2020
Publisher:	OXFORD UNIV PRESS
Place of Publication:	OXFORD
ISSN:	1460-2431
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language GAS-CHROMATOGRAPHY; DROUGHT; ARABIDOPSIS; PROTEIN; HEAT; TRANSCRIPTION; COMBINATIONS; SALINITY; COLD; TEMPERATURE Multiple languages Plant Sciences Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/32376