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Shapiguzov A, Nikkanen L, Fitzpatrick D, Vainonen JP, Gossens R, Alseekh S, Aarabi F, Tiwari A, Blokhina O, Panzarová K, Benedikty Z, Tyystjärvi E, Fernie AR, Trtílek M, Aro EM, Rintamäki E, Kangasjärvi J. Dissecting the interaction of photosynthetic electron transfer with mitochondrial signalling and hypoxic response in the Arabidopsis rcd1 mutant. Philos Trans R Soc Lond B Biol Sci 2020; 375:20190413. [PMID: 32362253 PMCID: PMC7209945 DOI: 10.1098/rstb.2019.0413] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
The Arabidopsis mutant rcd1 is tolerant to methyl viologen (MV). MV enhances the Mehler reaction, i.e. electron transfer from Photosystem I (PSI) to O2, generating reactive oxygen species (ROS) in the chloroplast. To study the MV tolerance of rcd1, we first addressed chloroplast thiol redox enzymes potentially implicated in ROS scavenging. NADPH-thioredoxin oxidoreductase type C (NTRC) was more reduced in rcd1. NTRC contributed to the photosynthetic and metabolic phenotypes of rcd1, but did not determine its MV tolerance. We next tested rcd1 for alterations in the Mehler reaction. In rcd1, but not in the wild type, the PSI-to-MV electron transfer was abolished by hypoxic atmosphere. A characteristic feature of rcd1 is constitutive expression of mitochondrial dysfunction stimulon (MDS) genes that affect mitochondrial respiration. Similarly to rcd1, in other MDS-overexpressing plants hypoxia also inhibited the PSI-to-MV electron transfer. One possible explanation is that the MDS gene products may affect the Mehler reaction by altering the availability of O2. In green tissues, this putative effect is masked by photosynthetic O2 evolution. However, O2 evolution was rapidly suppressed in MV-treated plants. Transcriptomic meta-analysis indicated that MDS gene expression is linked to hypoxic response not only under MV, but also in standard growth conditions. This article is part of the theme issue 'Retrograde signalling from endosymbiotic organelles'.
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Affiliation(s)
- Alexey Shapiguzov
- Organismal and Evolutionary Biology Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, FI-00014 Helsinki, Finland.,Viikki Plant Science Center, University of Helsinki, FI-00014 Helsinki, Finland
| | - Lauri Nikkanen
- Department of Biochemistry/Molecular Plant Biology, University of Turku, FI-20014 Turku, Finland
| | - Duncan Fitzpatrick
- Department of Biochemistry/Molecular Plant Biology, University of Turku, FI-20014 Turku, Finland
| | - Julia P Vainonen
- Organismal and Evolutionary Biology Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, FI-00014 Helsinki, Finland.,Viikki Plant Science Center, University of Helsinki, FI-00014 Helsinki, Finland
| | - Richard Gossens
- Organismal and Evolutionary Biology Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, FI-00014 Helsinki, Finland.,Viikki Plant Science Center, University of Helsinki, FI-00014 Helsinki, Finland
| | - Saleh Alseekh
- Max-Planck Institute for Molecular Plant Physiology, D-14476 Potsdam-Golm, Germany.,Center of Plant Systems Biology and Biotechnology, 4000 Plovdiv, Bulgaria
| | - Fayezeh Aarabi
- Max-Planck Institute for Molecular Plant Physiology, D-14476 Potsdam-Golm, Germany
| | - Arjun Tiwari
- Department of Biochemistry/Molecular Plant Biology, University of Turku, FI-20014 Turku, Finland
| | - Olga Blokhina
- Organismal and Evolutionary Biology Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, FI-00014 Helsinki, Finland.,Viikki Plant Science Center, University of Helsinki, FI-00014 Helsinki, Finland
| | | | | | - Esa Tyystjärvi
- Department of Biochemistry/Molecular Plant Biology, University of Turku, FI-20014 Turku, Finland
| | - Alisdair R Fernie
- Max-Planck Institute for Molecular Plant Physiology, D-14476 Potsdam-Golm, Germany.,Center of Plant Systems Biology and Biotechnology, 4000 Plovdiv, Bulgaria
| | - Martin Trtílek
- Photon Systems Instruments, 664 24 Drásov, Czech Republic
| | - Eva-Mari Aro
- Department of Biochemistry/Molecular Plant Biology, University of Turku, FI-20014 Turku, Finland
| | - Eevi Rintamäki
- Department of Biochemistry/Molecular Plant Biology, University of Turku, FI-20014 Turku, Finland
| | - Jaakko Kangasjärvi
- Organismal and Evolutionary Biology Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, FI-00014 Helsinki, Finland.,Viikki Plant Science Center, University of Helsinki, FI-00014 Helsinki, Finland
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