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  Dissecting the interaction of photosynthetic electron transfer with mitochondrial signalling and hypoxic response in the Arabidopsis rcd1 mutant

Shapiguzov, A., Nikkanen, L., Fitzpatrick, D., Vainonen, J. P., Gossens, R., Alseekh, S., et al. (2020). Dissecting the interaction of photosynthetic electron transfer with mitochondrial signalling and hypoxic response in the Arabidopsis rcd1 mutant. Philosophical Transactions of the Royal Society of London, Series B: Biological Sciences, 375(1801): 20190413. doi:10.1098/rstb.2019.0413.

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Shapiguzov, Alexey1, Autor
Nikkanen, Lauri1, Autor
Fitzpatrick, Duncan1, Autor
Vainonen, Julia P.1, Autor
Gossens, Richard1, Autor
Alseekh, S.2, Autor           
Aarabi, F.2, Autor           
Tiwari, Arjun1, Autor
Blokhina, Olga1, Autor
Panzarová, Klára1, Autor
Benedikty, Zuzana1, Autor
Tyystjärvi, Esa1, Autor
Fernie, A. R.2, Autor           
Trtílek, Martin1, Autor
Aro, Eva-Mari1, Autor
Rintamäki, Eevi1, Autor
Kangasjärvi, Jaakko1, Autor
Affiliations:
1External Organizations, ou_persistent22              
2Central Metabolism, Department Willmitzer, Max Planck Institute of Molecular Plant Physiology, Max Planck Society, ou_1753339              

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 Zusammenfassung: 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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Sprache(n): eng - English
 Datum: 2020
 Publikationsstatus: Erschienen
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 Ort, Verlag, Ausgabe: -
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 Identifikatoren: DOI: 10.1098/rstb.2019.0413
BibTex Citekey: doi:10.1098/rstb.2019.0413
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Titel: Philosophical Transactions of the Royal Society of London, Series B: Biological Sciences
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: London : Royal Society
Seiten: - Band / Heft: 375 (1801) Artikelnummer: 20190413 Start- / Endseite: - Identifikator: ISSN: 0962-8436
CoNE: https://pure.mpg.de/cone/journals/resource/963017382021_1