Ethylene augments root hypoxia tolerance via growth cessation and reactive oxygen species amelioration

A - Papers appearing in refereed journals

Liu, Z., Hartman, S., Van Veen, H., Zhang, H., Leeggangers , H. A. C. F., Martopawiro, S., Bosman, F., De Deugd, F., Su, P., Hummel, M., Rankenberg, T., Hassall, K. L., Bailey-Serres, J., Theodoulou, F. L., Voesenek L. A. C. J. and Sasidharan, R. 2022. Ethylene augments root hypoxia tolerance via growth cessation and reactive oxygen species amelioration. Plant Physiology. 190 (2), pp. 1365-1383. https://doi.org/10.1093/plphys/kiac245

AuthorsLiu, Z., Hartman, S., Van Veen, H., Zhang, H., Leeggangers , H. A. C. F., Martopawiro, S., Bosman, F., De Deugd, F., Su, P., Hummel, M., Rankenberg, T., Hassall, K. L., Bailey-Serres, J., Theodoulou, F. L., Voesenek L. A. C. J. and Sasidharan, R.
Abstract

Flooded plants experience impaired gas diffusion underwater, leading to oxygen deprivation (hypoxia). The volatile plant hormone ethylene is rapidly trapped in submerged plant cells and is instrumental for enhanced hypoxia acclimation. However, the precise mechanisms underpinning ethylene-enhanced hypoxia survival remain unclear. We studied the effect of ethylene pretreatment on hypoxia survival of Arabidopsis (Arabidopsis thaliana) primary root tips. Both hypoxia itself and re-oxygenation following hypoxia are highly damaging to root tip cells, and ethylene pretreatments reduced this damage. Ethylene pretreatment alone altered the abundance of transcripts and proteins involved in hypoxia responses, root growth, translation, and reactive oxygen species (ROS) homeostasis. Through imaging and manipulating ROS abundance in planta, we demonstrated that ethylene limited excessive ROS formation during hypoxia and subsequent re-oxygenation and improved oxidative stress survival in a PHYTOGLOBIN1-dependent manner. In addition, we showed that root growth cessation via ethylene and auxin occurred rapidly and that this quiescence behavior contributed to enhanced hypoxia tolerance. Collectively, our results show that the early flooding signal ethylene modulates a variety of processes that all contribute to hypoxia survival

Year of Publication2022
JournalPlant Physiology
Journal citation190 (2), pp. 1365-1383
Digital Object Identifier (DOI)https://doi.org/10.1093/plphys/kiac245
Open accessPublished as ‘gold’ (paid) open access
FunderBiotechnology and Biological Sciences Research Council
Funder project or codeTPM - Tailoring Plant Metabolism - Work package 1 (WP1) - High value lipids for health and industry
Publisher's version
Output statusPublished
Publication dates
Online30 May 2022
Publication process dates
Accepted29 Apr 2022
PublisherAmerican Society of Plant Biologists (ASPB)
ISSN0032-0889

Permalink - https://repository.rothamsted.ac.uk/item/988y5/ethylene-augments-root-hypoxia-tolerance-via-growth-cessation-and-reactive-oxygen-species-amelioration

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