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Cell Death in Cells Overlying Lateral Root Primordia Facilitates Organ Growth in Arabidopsis
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: 0000-0001-7049-6978
Umeå University, Faculty of Science and Technology, Department of Plant Physiology. Umeå University, Faculty of Science and Technology, Umeå Plant Science Centre (UPSC).
Umeå University, Faculty of Science and Technology, Umeå Plant Science Centre (UPSC). Umeå University, Faculty of Science and Technology, Department of Plant Physiology.
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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2020 (English)In: Current Biology, ISSN 0960-9822, E-ISSN 1879-0445, Vol. 30, no 3, p. 455-464Article in journal (Refereed) Published
Abstract [en]

Plant organ growth is widely accepted to be determined by cell division and cell expansion, but, unlike that in animals, the contribution of cell elimination has rarely been recognized. We investigated this paradigm during Arabidopsis lateral root formation, when the lateral root primordia (LRP) must traverse three overlying cell layers within the parent root. A subset of LRP-overlying cells displayed the induction of marker genes for cell types undergoing developmental cell death, and their cell death was detected by electron, confocal, and light sheet microscopy techniques. LRP growth was delayed in cell-deathdeficient mutants lacking the positive cell death regulator ORESARA1/ANAC092 (ORE1). LRP growth was restored in ore1-2 knockout plants by genetically inducing cell elimination in cells overlying the LRP or by physically killing LRP-overlying cells by ablation with optical tweezers. Our results support that, in addition to previously discovered mechanisms, cell elimination contributes to regulating lateral root emergence.

Place, publisher, year, edition, pages
Elsevier, 2020. Vol. 30, no 3, p. 455-464
National Category
Developmental Biology Other Physics Topics
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URN: urn:nbn:se:umu:diva-168335DOI: 10.1016/j.cub.2019.11.078ISI: 000511287900024PubMedID: 31956028Scopus ID: 2-s2.0-85078465553OAI: oai:DiVA.org:umu-168335DiVA, id: diva2:1395833
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Bio4Energy
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Bio4EnergyAvailable from: 2020-02-24 Created: 2020-02-24 Last updated: 2023-03-24Bibliographically approved

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Escamez, SachaSztojka, BernadetteBollhöner, BenjaminHall, HardyAndersson, MagnusTuominen, Hannele

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Escamez, SachaSztojka, BernadetteBollhöner, BenjaminHall, HardyAndersson, MagnusTuominen, Hannele
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Department of Plant PhysiologyUmeå Plant Science Centre (UPSC)Department of Physics
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