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Salicylic acid metabolism and signalling coordinate senescence initiation in aspen in nature

Author

Listed:
  • Jenna Lihavainen

    (Umeå University)

  • Jan Šimura

    (Swedish University of Agricultural Sciences)

  • Pushan Bag

    (Umeå University
    University of Oxford)

  • Nazeer Fataftah

    (Umeå University)

  • Kathryn Megan Robinson

    (Umeå University)

  • Nicolas Delhomme

    (Swedish University of Agricultural Sciences)

  • Ondřej Novák

    (Swedish University of Agricultural Sciences
    Palacký University and Institute of Experimental Botany of the Czech Academy of Sciences)

  • Karin Ljung

    (Swedish University of Agricultural Sciences)

  • Stefan Jansson

    (Umeå University)

Abstract

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.

Suggested Citation

  • Jenna Lihavainen & Jan Šimura & Pushan Bag & Nazeer Fataftah & Kathryn Megan Robinson & Nicolas Delhomme & Ondřej Novák & Karin Ljung & Stefan Jansson, 2023. "Salicylic acid metabolism and signalling coordinate senescence initiation in aspen in nature," Nature Communications, Nature, vol. 14(1), pages 1-20, December.
    • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-39564-5
    DOI: 10.1038/s41467-023-39564-5
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    References listed on IDEAS

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    1. Peter Langfelder & Rui Luo & Michael C Oldham & Steve Horvath, 2011. "Is My Network Module Preserved and Reproducible?," PLOS Computational Biology, Public Library of Science, vol. 7(1), pages 1-29, January.
    2. Tongjun Sun & Yaxi Zhang & Yan Li & Qian Zhang & Yuli Ding & Yuelin Zhang, 2015. "ChIP-seq reveals broad roles of SARD1 and CBP60g in regulating plant immunity," Nature Communications, Nature, vol. 6(1), pages 1-12, December.
    3. M. B. Shine & Qing-ming Gao & R. V. Chowda-Reddy & Asheesh K. Singh & Pradeep Kachroo & Aardra Kachroo, 2019. "Glycerol-3-phosphate mediates rhizobia-induced systemic signaling in soybean," Nature Communications, Nature, vol. 10(1), pages 1-13, December.
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