Drought resistance is mediated by divergent strategies in closely related Brassicaceae.
DHONDT, Stijn
Department of plant Biotechnology and Bioinformatics
Flanders Institute for Biotechnology
Department of plant Biotechnology and Bioinformatics
Flanders Institute for Biotechnology
GONZALEZ, Nathalie
Biologie du fruit et pathologie [BFP]
Department of plant Biotechnology and Bioinformatics
Flanders Institute for Biotechnology
Biologie du fruit et pathologie [BFP]
Department of plant Biotechnology and Bioinformatics
Flanders Institute for Biotechnology
INZÉ, Dirk
Department of plant Biotechnology and Bioinformatics
Flanders Institute for Biotechnology
< Réduire
Department of plant Biotechnology and Bioinformatics
Flanders Institute for Biotechnology
Langue
en
Article de revue
Ce document a été publié dans
New Phytologist. 2019, vol. 223, n° 2, p. 783-797
Wiley
Résumé en anglais
Droughts cause severe crop losses worldwide and climate change is projected to increase their prevalence in the future. Similar to the situation for many crops, the reference plant Arabidopsis thaliana (Ath) is considered ...Lire la suite >
Droughts cause severe crop losses worldwide and climate change is projected to increase their prevalence in the future. Similar to the situation for many crops, the reference plant Arabidopsis thaliana (Ath) is considered drought-sensitive, whereas, as we demonstrate, its close relatives Arabidopsis lyrata (Aly) and Eutrema salsugineum (Esa) are drought-resistant. To understand the molecular basis for this plasticity we conducted a deep phenotypic, biochemical and transcriptomic comparison using developmentally matched plants. We demonstrate that Aly responds most sensitively to decreasing water availability with early growth reduction, metabolic adaptations and signaling network rewiring. By contrast, Esa is in a constantly prepared mode as evidenced by high basal proline levels, ABA signaling transcripts and late growth responses. The stress-sensitive Ath responds later than Aly and earlier than Esa, although its responses tend to be more extreme. All species detect water scarcity with similar sensitivity; response differences are encoded in downstream signaling and response networks. Moreover, several signaling genes expressed at higher basal levels in both Aly and Esa have been shown to increase water-use efficiency and drought resistance when overexpressed in Ath. Our data demonstrate contrasting strategies of closely related Brassicaceae to achieve drought resistance.< Réduire
Mots clés
transcriptome
Mots clés en anglais
Arabidopsis
Brassicaceae
comparative phenotyping
drought
high-throughput phenotyping
stress resistance
systems biology
Origine
Importé de halUnités de recherche