Universität zu Köln

Bouzid, M., He, F., Schmitz, G., Haeusler, R. E., Weber, A. P. M., Mettler-Altmann, T. and de Meaux, J. ORCID: 0000-0002-2942-4750 (2019). Arabidopsis species deploy distinct strategies to cope with drought stress. Ann. Bot., 124 (1). S. 27 - 41. OXFORD: OXFORD UNIV PRESS. ISSN 1095-8290

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Abstract

Background and Aims Water limitation is an important determinant of the distribution, abundance and diversity of plant species. Yet, little is known about how the response to limiting water supply changes among closely related plant species with distinct ecological preferences. Comparison of the model annual species Arabidopsis thaliana with its close perennial relatives A. lyrata and A. halleri, can help disentangle the molecular and physiological changes contributing to tolerance and avoidance mechanisms, because these species must maintain tolerance and avoidance mechanisms to increase long-term survival, but they are exposed to different levels of water stress and competition in their natural habitat. Methods A dry-down experiment was conducted to mimic a period of missing precipitation. The covariation of a progressive decrease in soil water content (SWC) with various physiological and morphological plant traits across a set of representative genotypes in A. thaliana, A. lyrata and A. halleri was quantified. Transcriptome changes to soil dry-down were further monitored. Key Results The analysis of trait covariation demonstrates that the three species differ in the strategies they deploy to respond to drought stress. Arabidopsis thaliana showed a drought avoidance reaction but failed to survive wilting. Arabidopsis lyrata efficiently combined avoidance and tolerance mechanisms. In contrast, A. halleri showed some degree of tolerance to wilting but it did not seem to protect itself from the stress imposed by drought. Transcriptome data collected just before plant wilting and after recovery corroborated the phenotypic analysis, with A. lyrata and A. halleri showing a stronger activation of recovery- and stress-related genes, respectively. Conclusions The response of the three Arabidopsis species to soil dry-down reveals that they have evolved distinct strategies to face drought stress. These strategic differences are in agreement with the distinct ecological priorities of the stress-tolerant A. lyrata, the competitive A. halleri and the ruderal A. thaliana.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Bouzid, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED He, F. UNSPECIFIED UNSPECIFIED UNSPECIFIED Schmitz, G. UNSPECIFIED UNSPECIFIED UNSPECIFIED Haeusler, R. E. UNSPECIFIED UNSPECIFIED UNSPECIFIED Weber, A. P. M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Mettler-Altmann, T. UNSPECIFIED UNSPECIFIED UNSPECIFIED de Meaux, J. UNSPECIFIED orcid.org/0000-0002-2942-4750 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-137350
DOI:	10.1093/aob/mcy237
Journal or Publication Title:	Ann. Bot.
Volume:	124
Number:	1
Page Range:	S. 27 - 41
Date:	2019
Publisher:	OXFORD UNIV PRESS
Place of Publication:	OXFORD
ISSN:	1095-8290
Language:	English
Faculty:	Faculty of Mathematics and Natural Sciences
Divisions:	Faculty of Mathematics and Natural Sciences > Department of Biology > Botanical Institute
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language NATURAL VARIATION; STOMATAL DENSITY; FLOWERING TIME; WATER-DEFICIT; CHLOROPHYLL FLUORESCENCE; ELECTRON-TRANSPORT; EXTREME DROUGHT; GENETIC-BASIS; HIGH-SALINITY; PLANT-GROWTH Multiple languages Plant Sciences Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/13735