Abstract
Abiotic stresses in plants are often transient, and the recovery phase following stress removal is critical. Flooding, a major abiotic stress that negatively impacts plant biodiversity and agriculture, is a sequential stress where tolerance is strongly dependent on viability underwater and during the postflooding period. Here we show that in Arabidopsis thaliana accessions (Bay-0 and Lp2-6), different rates of submergence recovery correlate with submergence tolerance and fecundity. A genome-wide assessment of ribosome-associated transcripts in Bay-0 and Lp2-6 revealed a signaling network regulating recovery processes. Differential recovery between the accessions was related to the activity of three genes: RESPIRATORY BURST OXIDASE HOMOLOG D, SENESCENCE-ASSOCIATED GENE113, and ORESARA1, which function in a regulatory network involving a reactive oxygen species (ROS) burst upon desubmergence and the hormones abscisic acid and ethylene. This regulatory module controls ROS homeostasis, stomatal aperture, and chlorophyll degradation during submergence recovery. This work uncovers a signaling network that regulates recovery processes following flooding to hasten the return to prestress homeostasis.
Original language | English |
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Pages (from-to) | E6085-E6094 |
Journal | Proceedings of the National Academy of Sciences of the United States of America |
Volume | 115 |
Issue number | 26 |
DOIs | |
Publication status | Published - 26 Jun 2018 |
Funding
ACKNOWLEDGMENTS. At Utrecht University, we thank Rob Welschen for managing the growth facilities, Emilie Reinen and Zeguang Liu for genotyping mutant lines, Yorrit van de Kaa for seed harvesting, and Sven Teurlincx and Ankie Ammerlaan for experimental assistance. We appreciate Timo Staffel at the University of Kiel for assisting with plant growth for EPR measurements. We thank Thomas Girke of the University of California, Riverside for guidance on the Ribo-seq workflow in R/Bioconductor. This work was supported by grants (to R.S.) from the Netherlands Organisation for Scientific Research (NWO 016. VIDI.171.006 and NWO-VENI 863.12.013) and grants (to J.B.-S.) from the US National Science Foundation (MCB-1021969) and the US Department of Agriculture National Institute of Food and Agriculture Hatch program. E.Y. was supported by a PhD scholarship from Utrecht University.
Keywords
- Dehydration
- Flooding
- Reactive oxygen species
- Recovery
- Ribosome footprinting