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

• DOI: 10.1093/plphys/kiac245
• Publication Date: 2022-05-31T22:20:41Z
• Authors: Zeguang Liu; Sjon Hartman; Hans van Veen; Hongtao Zhang; Hendrika A C F Le...; Shanice Martopawiro; Femke Bosman; Florian de Deugd; Peng Su; Maureen Hummel; Tom Rankenberg; Kirsty L Hassall; Julia Bailey-Serres; Frederica L Theod...; Laurentius A C J ...; Rashmi Sasidharan
• Keywords: Hypoxia

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