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Cited 31 time in webofscience Cited 34 time in scopus
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Drought resistance is mediated by divergent strategies in closely related Brassicaceaeopen access

Authors
Marin-de la Rosa, NoraLin, Chung-WenKang, Yang JaeDhondt, StijnGonzalez, NathalieInze, DirkFalter-Braun, Pascal
Issue Date
Jul-2019
Publisher
Blackwell Publishing Inc.
Keywords
Arabidopsis; Brassicaceae; comparative phenotyping; drought; high-throughput phenotyping; stress resistance; systems biology; transcriptome
Citation
New Phytologist, v.223, no.2, pp 783 - 797
Pages
15
Indexed
SCI
SCIE
SCOPUS
Journal Title
New Phytologist
Volume
223
Number
2
Start Page
783
End Page
797
URI
https://scholarworks.gnu.ac.kr/handle/sw.gnu/9020
DOI
10.1111/nph.15841
ISSN
0028-646X
1469-8137
Abstract
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.
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