Universität zu Köln

Dittberner, Hannes, Korte, Arthur, Mettler-Altmann, Tabea, Weber, Andreas P. M., Monroe, Grey and de Meaux, Juliette ORCID: 0000-0002-2942-4750 (2018). Natural variation in stomata size contributes to the local adaptation of water-use efficiency in Arabidopsis thaliana. Mol. Ecol., 27 (20). S. 4052 - 4066. HOBOKEN: WILEY. ISSN 1365-294X

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Abstract

Stomata control gas exchanges between the plant and the atmosphere. How natural variation in stomata size and density contributes to resolve trade-offs between carbon uptake and water loss in response to local climatic variation is not yet understood. We developed an automated confocal microscopy approach to characterize natural genetic variation in stomatal patterning in 330 fully sequenced Arabidopsis thaliana accessions collected throughout the European range of the species. We compared this to variation in water-use efficiency, measured as carbon isotope discrimination (C-13). We detect substantial genetic variation for stomata size and density segregating within Arabidopsis thaliana. A positive correlation between stomata size and C-13 further suggests that this variation has consequences on water-use efficiency. Genome wide association analyses indicate a complex genetic architecture underlying not only variation in stomatal patterning but also to its covariation with carbon uptake parameters. Yet, we report two novel QTL affecting C-13 independently of stomatal patterning. This suggests that, in A. thaliana, both morphological and physiological variants contribute to genetic variance in water-use efficiency. Patterns of regional differentiation and covariation with climatic parameters indicate that natural selection has contributed to shape some of this variation, especially in Southern Sweden, where water availability is more limited in spring relative to summer. These conditions are expected to favour the evolution of drought avoidance mechanisms over drought escape strategies.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Dittberner, Hannes UNSPECIFIED UNSPECIFIED UNSPECIFIED Korte, Arthur UNSPECIFIED UNSPECIFIED UNSPECIFIED Mettler-Altmann, Tabea UNSPECIFIED UNSPECIFIED UNSPECIFIED Weber, Andreas P. M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Monroe, Grey UNSPECIFIED UNSPECIFIED UNSPECIFIED de Meaux, Juliette UNSPECIFIED orcid.org/0000-0002-2942-4750 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-170403
DOI:	10.1111/mec.14838
Journal or Publication Title:	Mol. Ecol.
Volume:	27
Number:	20
Page Range:	S. 4052 - 4066
Date:	2018
Publisher:	WILEY
Place of Publication:	HOBOKEN
ISSN:	1365-294X
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 GENOME-WIDE ASSOCIATION; DROUGHT TOLERANCE; TRANSPIRATION EFFICIENCY; GENETIC MANIPULATION; CLIMATE ADAPTATION; LEAF CONDUCTANCE; ABIOTIC STRESS; DENSITY; MODEL; TEMPERATURE Multiple languages Biochemistry & Molecular Biology; Ecology; Evolutionary Biology Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/17040