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STN7 Kinase Is Essential for Arabidopsis thaliana Fitness under Prolonged Darkness but Not under Dark-Chilling Conditions.

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dc.abstract.enReversible phosphorylation of photosystem II light harvesting complexes (LHCII) is a well-established protective mechanism enabling efficient response to changing light conditions. However, changes in LHCII phosphorylation were also observed in response to abiotic stress regardless of photoperiod. This study aimed to investigate the impact of dark-chilling on LHCII phosphorylation pattern in chilling-tolerant Arabidopsis thaliana and to check whether the disturbed LHCII phosphorylation process will impact the response of Arabidopsis to the dark-chilling conditions. We analyzed the pattern of LHCII phosphorylation, the organization of chlorophyll–protein complexes, and the level of chilling tolerance by combining biochemical and spectroscopy techniques under dark-chilling and dark conditions in Arabidopsis mutants with disrupted LHCII phosphorylation. Our results show that during dark-chilling, LHCII phosphorylation decreased in all examined plant lines and that no significant differences in dark-chilling response were registered in tested lines. Interestingly, after 24 h of darkness, a high increase in LHCII phosphorylation was observed, co-occurring with a significant FV/FM parameter decrease. The highest drop of FV/FM was detected in the stn7-1 line–mutant, where the LHCII is not phosphorylated, due to the lack of STN7 kinase. Our results imply that STN7 kinase activity is important for mitigating the adverse effects of prolonged darkness.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorGieczewska, Katarzyna
dc.contributor.authorMazur, Radosław
dc.contributor.authorKulik, Anna
dc.contributor.authorKrysiak, Małgorzata
dc.contributor.authorWęgrzyn, Anna
dc.date.accessioned2024-01-26T08:10:34Z
dc.date.available2024-01-26T08:10:34Z
dc.date.copyright2022-04-20
dc.date.issued2022
dc.description.accesstimeAT_PUBLICATION
dc.description.financeNie dotyczy
dc.description.number9
dc.description.versionFINAL_PUBLISHED
dc.description.volume23
dc.identifier.doi10.3390/IJMS23094531
dc.identifier.issn1422-0067
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/120733
dc.identifier.weblinkhttps://www.mdpi.com/1422-0067/23/9/4531
dc.languageeng
dc.pbn.affiliationbiological sciences
dc.relation.ispartofInternational Journal of Molecular Sciences
dc.relation.pages4531 (1-18)
dc.rightsCC-BY
dc.sciencecloudnosend
dc.subject.enArabidopsis thaliana
dc.subject.enchilling response
dc.subject.endarkness
dc.subject.endark-chilling
dc.subject.enLHCII phosphorylation
dc.subject.enphotosynthesis
dc.subject.enSTN7 kinase
dc.titleSTN7 Kinase Is Essential for Arabidopsis thaliana Fitness under Prolonged Darkness but Not under Dark-Chilling Conditions.
dc.typeJournalArticle
dspace.entity.typePublication