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Article

FMO1 Is Involved in Excess Light Stress-Induced Signal Transduction and Cell Death Signaling

1
Department of Botany, Institute of Biology, Warsaw University of Life Sciences, Nowoursynowska 159, 02-776 Warsaw, Poland
2
Department of Plant Genetics, Breeding and Biotechnology, Institute of Biology, Warsaw University of Life Sciences, Nowoursynowska 159, 02-776 Warsaw, Poland
3
The Division of Plant Sciences and Interdisciplinary Plant Group, College of Agriculture, Food and Natural Resources, Christopher S. Bond Life Sciences Center University of Missouri, Columbia, MO 65211, USA
4
Institute of Technology and Life Sciences, Falenty, Al. Hrabska 3, 05-090 Raszyn, Poland
5
Department of Surgery, University of Missouri School of Medicine, Columbia, MO 65212, USA
*
Author to whom correspondence should be addressed.
Cells 2020, 9(10), 2163; https://doi.org/10.3390/cells9102163
Received: 29 August 2020 / Revised: 22 September 2020 / Accepted: 24 September 2020 / Published: 24 September 2020
(This article belongs to the Special Issue Programmed Cell Death Regulation in Plants)
Because of their sessile nature, plants evolved integrated defense and acclimation mechanisms to simultaneously cope with adverse biotic and abiotic conditions. Among these are systemic acquired resistance (SAR) and systemic acquired acclimation (SAA). Growing evidence suggests that SAR and SAA activate similar cellular mechanisms and employ common signaling pathways for the induction of acclimatory and defense responses. It is therefore possible to consider these processes together, rather than separately, as a common systemic acquired acclimation and resistance (SAAR) mechanism. Arabidopsis thaliana flavin-dependent monooxygenase 1 (FMO1) was previously described as a regulator of plant resistance in response to pathogens as an important component of SAR. In the current study, we investigated its role in SAA, induced by a partial exposure of Arabidopsis rosette to local excess light stress. We demonstrate here that FMO1 expression is induced in leaves directly exposed to excess light stress as well as in systemic leaves remaining in low light. We also show that FMO1 is required for the systemic induction of ASCORBATE PEROXIDASE 2 (APX2) and ZINC-FINGER OF ARABIDOPSIS 10 (ZAT10) expression and spread of the reactive oxygen species (ROS) systemic signal in response to a local application of excess light treatment. Additionally, our results demonstrate that FMO1 is involved in the regulation of excess light-triggered systemic cell death, which is under control of LESION SIMULATING DISEASE 1 (LSD1). Our study indicates therefore that FMO1 plays an important role in triggering SAA response, supporting the hypothesis that SAA and SAR are tightly connected and use the same signaling pathways. View Full-Text
Keywords: flavin-dependent monooxygenase 1; SAA; SAR; cell death; Arabidopsis flavin-dependent monooxygenase 1; SAA; SAR; cell death; Arabidopsis
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MDPI and ACS Style

Czarnocka, W.; Fichman, Y.; Bernacki, M.; Różańska, E.; Sańko-Sawczenko, I.; Mittler, R.; Karpiński, S. FMO1 Is Involved in Excess Light Stress-Induced Signal Transduction and Cell Death Signaling. Cells 2020, 9, 2163. https://doi.org/10.3390/cells9102163

AMA Style

Czarnocka W, Fichman Y, Bernacki M, Różańska E, Sańko-Sawczenko I, Mittler R, Karpiński S. FMO1 Is Involved in Excess Light Stress-Induced Signal Transduction and Cell Death Signaling. Cells. 2020; 9(10):2163. https://doi.org/10.3390/cells9102163

Chicago/Turabian Style

Czarnocka, Weronika, Yosef Fichman, Maciej Bernacki, Elżbieta Różańska, Izabela Sańko-Sawczenko, Ron Mittler, and Stanisław Karpiński. 2020. "FMO1 Is Involved in Excess Light Stress-Induced Signal Transduction and Cell Death Signaling" Cells 9, no. 10: 2163. https://doi.org/10.3390/cells9102163

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