Preprint Review Version 1 Preserved in Portico This version is not peer-reviewed

Intertwined Roles of Reactive Oxygen Species and Salicylic Acid Signaling Are Crucial for the Plant Response to Biotic Stress

Version 1 : Received: 6 March 2022 / Approved: 7 March 2022 / Online: 7 March 2022 (14:46:28 CET)

A peer-reviewed article of this Preprint also exists.

Lukan, T.; Coll, A. Intertwined Roles of Reactive Oxygen Species and Salicylic Acid Signaling Are Crucial for the Plant Response to Biotic Stress. Int. J. Mol. Sci. 2022, 23, 5568. Lukan, T.; Coll, A. Intertwined Roles of Reactive Oxygen Species and Salicylic Acid Signaling Are Crucial for the Plant Response to Biotic Stress. Int. J. Mol. Sci. 2022, 23, 5568.

Journal reference: Int. J. Mol. Sci. 2022, 23, 5568
DOI: 10.3390/ijms23105568

Abstract

One of the earliest hallmarks of plant immune response is production of reactive oxygen spe-cies (ROS) in different subcellular compartments, which regulate plant immunity. A suitable equilibrium, which is crucial to prevent ROS over-accumulation leading to oxidative stress, is maintained by salicylic acid (SA), a chief regulator of ROS. However, ROS are not only acting downstream of SA signaling, but were also proposed to be a central component of a self-amplifying loop that regulates SA signaling as well as the interaction balance between dif-ferent phytohormones. The exact role of this crosstalk, the position where SA interferes with ROS signaling and ROS interferes with SA signaling and the outcome of this regulation depend on the origin of ROS but also on the pathosystem. The precise spatiotemporal regulation of or-ganelle specific ROS and SA levels determine the effectiveness of pathogen arrest and is there-fore crucial for a successful immune response. However, the regulatory interplay behind still remain poorly understood, as up till now, the role of organelle specific ROS and SA in HR-conferred resistance has mostly been studied by altering the level of a single component. In order to address these aspects, a sophisticated combination of research methods for monitoring the spatiotemporal dynamics of key players and transcriptional activity in plants is needed, and will most probably consist of biosensors and precision transcriptomics.

Keywords

plant immune response; reactive oxygen species; salicylic acid; reactive oxygen species-salicylic acid crosstalk; programmed cell death; hypersensitive response-conferred resistance; RBOH NADPH oxidases; chloroplastic redox state; biosensors; precision transcriptomics

Subject

BIOLOGY, Plant Sciences

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