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Salicylic acid metabolism and signalling coordinate senescence initiation in aspen in nature
Umeå University, Faculty of Science and Technology, Department of Plant Physiology. Umeå University, Faculty of Science and Technology, Umeå Plant Science Centre (UPSC).ORCID iD: 0000-0001-7979-8876
Umeå Plant Science Centre, Department of Forest Genetics and Plant Physiology, Swedish University of Agricultural Sciences, Umeå, Sweden.
Umeå University, Faculty of Science and Technology, Department of Plant Physiology. Umeå University, Faculty of Science and Technology, Umeå Plant Science Centre (UPSC). Section of Molecular Plant Biology, Department of Biology, University of Oxford, Oxford, United Kingdom.ORCID iD: 0000-0003-3858-4606
Umeå University, Faculty of Science and Technology, Department of Plant Physiology. Umeå University, Faculty of Science and Technology, Umeå Plant Science Centre (UPSC).
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2023 (English)In: Nature Communications, E-ISSN 2041-1723, Vol. 14, no 1, article id 4288Article in journal (Refereed) Published
Abstract [en]

Deciduous trees exhibit a spectacular phenomenon of autumn senescence driven by the seasonality of their growth environment, yet there is no consensus which external or internal cues trigger it. Senescence starts at different times in European aspen (Populus tremula L.) genotypes grown in same location. By integrating omics studies, we demonstrate that aspen genotypes utilize similar transcriptional cascades and metabolic cues to initiate senescence, but at different times during autumn. The timing of autumn senescence initiation appeared to be controlled by two consecutive “switches”; 1) first the environmental variation induced the rewiring of the transcriptional network, stress signalling pathways and metabolic perturbations and 2) the start of senescence process was defined by the ability of the genotype to activate and sustain stress tolerance mechanisms mediated by salicylic acid. We propose that salicylic acid represses the onset of leaf senescence in stressful natural conditions, rather than promoting it as often observed in annual plants.

Place, publisher, year, edition, pages
Springer Nature, 2023. Vol. 14, no 1, article id 4288
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Botany
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URN: urn:nbn:se:umu:diva-212477DOI: 10.1038/s41467-023-39564-5PubMedID: 37463905Scopus ID: 2-s2.0-85165262787OAI: oai:DiVA.org:umu-212477DiVA, id: diva2:1785672
Funder
Swedish Research CouncilSwedish Research Council FormasThe Kempe FoundationsSwedish Foundation for Strategic ResearchKnut and Alice Wallenberg FoundationVinnovaAvailable from: 2023-08-03 Created: 2023-08-03 Last updated: 2023-08-03Bibliographically approved

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Lihavainen, JennaBag, PushanFataftah, NazeerRobinson, Kathryn M.Jansson, Stefan

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Lihavainen, JennaBag, PushanFataftah, NazeerRobinson, Kathryn M.Jansson, Stefan
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