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  • Liebsch, DanielaUmeå universitet,Institutionen för fysiologisk botanik,Umeå Plant Science Centre (UPSC) (author)

Metabolic control of arginine and ornithine levels paces the progression of leaf senescence

  • Article/chapterEnglish2022

Publisher, publication year, extent ...

  • 2022-05-23
  • Oxford University Press,2022
  • electronicrdacarrier

Numbers

  • LIBRIS-ID:oai:DiVA.org:umu-198906
  • https://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-198906URI
  • https://doi.org/10.1093/plphys/kiac244DOI
  • https://res.slu.se/id/publ/117571URI

Supplementary language notes

  • Language:English
  • Summary in:English

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  • Subject category:ref swepub-contenttype
  • Subject category:art swepub-publicationtype

Notes

  • Leaf senescence can be induced by stress or aging, sometimes in a synergistic manner. It is generally acknowledged that the ability to withstand senescence-inducing conditions can provide plants with stress resilience. Although the signaling and transcriptional networks responsible for a delayed senescence phenotype, often referred to as a functional stay-green trait, have been actively investigated, very little is known about the subsequent metabolic adjustments conferring this aptitude to survival. First, using the individually darkened leaf (IDL) experimental setup, we compared IDLs of wild-type (WT) Arabidopsis (Arabidopsis thaliana) to several stay-green contexts, that is IDLs of two functional stay-green mutant lines, oresara1-2 (ore1-2) and an allele of phytochrome-interacting factor 5 (pif5), as well as to leaves from a WT plant entirely darkened (DP). We provide compelling evidence that arginine and ornithine, which accumulate in all stay-green contexts—likely due to the lack of induction of amino acids (AAs) transport—can delay the progression of senescence by fueling the Krebs cycle or the production of polyamines (PAs). Secondly, we show that the conversion of putrescine to spermidine (SPD) is controlled in an age-dependent manner. Thirdly, we demonstrate that SPD represses senescence via interference with ethylene signaling by stabilizing the ETHYLENE BINDING FACTOR1 and 2 (EBF1/2) complex. Taken together, our results identify arginine and ornithine as central metabolites influencing the stress- and age-dependent progression of leaf senescence. We propose that the regulatory loop between the pace of the AA export and the progression of leaf senescence provides the plant with a mechanism to fine-tune the induction of cell death in leaves, which, if triggered unnecessarily, can impede nutrient remobilization and thus plant growth and survival.

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  • Juvany, MartaUmeå universitet,Institutionen för fysiologisk botanik,Umeå Plant Science Centre (UPSC)(Swepub:umu)maju0050 (author)
  • Li, ZhonghaiNational Engineering Laboratory for Tree Breeding, College of Biological Sciences and Technology, Beijing Forestry University, Beijing, China (author)
  • Wang, Hou-LingNational Engineering Laboratory for Tree Breeding, College of Biological Sciences and Technology, Beijing Forestry University, Beijing, China (author)
  • Ziolkowska, AgnieszkaUmeå universitet,Institutionen för fysiologisk botanik,Umeå Plant Science Centre (UPSC)(Swepub:umu)agzi0001 (author)
  • Chrobok, Daria,1987-Umeå universitet,Institutionen för fysiologisk botanik,Umeå Plant Science Centre (UPSC)(Swepub:umu)dach0012 (author)
  • Boussardon, ClémentUmeå universitet,Institutionen för fysiologisk botanik,Umeå Plant Science Centre (UPSC)(Swepub:umu)clbo0009 (author)
  • Wen, XingDepartment of Biology, Institute of Plant and Food Science, Southern University of Science and Technology (SUSTech), Guangdong, Shenzhen, China (author)
  • Law, Simon R.Umeå universitet,Institutionen för fysiologisk botanik,Umeå Plant Science Centre (UPSC)(Swepub:umu)sila0026 (author)
  • Janečková, HelenaCentre of the Region Haná for Biotechnological and Agricultural Research, Department of Biophysics, Faculty of Science, Palacký University, Olomouc, Czech Republic (author)
  • Brouwer, BastiaanUmeå universitet,Institutionen för fysiologisk botanik,Umeå Plant Science Centre (UPSC)(Swepub:umu)babr0002 (author)
  • Lindén, PernillaUmeå universitet,Institutionen för fysiologisk botanik,Umeå Plant Science Centre (UPSC)(Swepub:umu)pealin01 (author)
  • Delhomme, NicolasSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Umeå universitet,Institutionen för fysiologisk botanik,Umeå Plant Science Centre (UPSC),Department of Forest Genetics and Plant Physiology, Umeå Plant Science Centre, Swedish University of Agricultural Sciences, Umeå, Sweden,Institutionen för skoglig genetik och växtfysiologi,Umea University(Swepub:slu)93629 (author)
  • Stenlund, HansSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Umeå universitet,Institutionen för fysiologisk botanik,Umeå Plant Science Centre (UPSC),Department of Forest Genetics and Plant Physiology, Umeå Plant Science Centre, Swedish University of Agricultural Sciences, Umeå, Sweden,Institutionen för skoglig genetik och växtfysiologi,Umea University(Swepub:slu)51898 (author)
  • Moritz, ThomasSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för skoglig genetik och växtfysiologi,Department of Forest Genetics and Plant Physiology,University of Copenhagen(Swepub:slu)49634 (author)
  • Gardeström, Per,1950-Umeå universitet,Institutionen för fysiologisk botanik,Umeå Plant Science Centre (UPSC)(Swepub:umu)pega0001 (author)
  • Guo, HongweiDepartment of Biology, Institute of Plant and Food Science, Southern University of Science and Technology (SUSTech), Guangdong, Shenzhen, China (author)
  • Keech, OlivierUmeå universitet,Institutionen för fysiologisk botanik,Umeå Plant Science Centre (UPSC)(Swepub:umu)olke0001 (author)
  • Umeå universitetInstitutionen för fysiologisk botanik (creator_code:org_t)
  • Sveriges lantbruksuniversitet

Related titles

  • In:Plant Physiology: Oxford University Press189:4, s. 1943-19600032-08891532-2548

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