Caloric restriction extends lifespan in a clonal plant

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dc.contributor.authorChmilar, Suzanne L.
dc.contributor.authorLuzardo, Amanda C.
dc.contributor.authorDutt, Priyanka
dc.contributor.authorPawluck, Abbe
dc.contributor.authorThwaites, Victoria C.
dc.contributor.authorLaird, Robert
dc.date.accessioned2024-08-22T22:30:59Z
dc.date.available2024-08-22T22:30:59Z
dc.date.issued2024
dc.descriptionOpen access article. Creative Commons Attribution-NonCommercial 4.0 International license (CC BY-NC 4.0) applies
dc.description.abstractWhen subjected to dietary caloric restriction (CR), individual animals often outlive well-fed conspecifics. Here, we address whether CR also extends lifespan in plants. Whereas caloric intake in animals comes from ingestion, in plants it derives from photosynthesis. Thus, factors that reduce photosynthesis, such as reduced light intensity, can induce CR. In two lab experiments investigating the aquatic macrophyte Lemna minor, we tracked hundreds of individuals longitudinally, with light intensity—and hence, CR—manipulated using neutral-density filters. In both experiments, CR dramatically increased lifespan through a process of temporal scaling. Moreover, the magnitude of lifespan extension accorded with the assumptions that (a) light intensity positively relates to photosynthesis following Michaelis–Menten kinetics, and (b) photosynthesis negatively relates to lifespan via a power law. Our results emphasize that CR-mediated lifespan extension applies to autotrophs as well as heterotrophs, and suggest that variation in light intensity has quantitatively predictable effects on plant aging trajectories.
dc.description.peer-reviewYes
dc.identifier.citationChmilar, S. L., Luzardo, A. C., Dutt, P., Pawluk, A., Thwaites, V. C. & Laird, R. A. (2024). Caloric restriction extends lifespan in a clonal plant. Ecology Letters, 27(6), Article e14444. https://doi.org/10.1111/ele.14444
dc.identifier.urihttps://hdl.handle.net/10133/6883
dc.language.isoen
dc.publisherWiley
dc.publisher.departmentDepartment of Biological Sciences
dc.publisher.facultyArts and Science
dc.publisher.institutionUniversity of Lethbridge
dc.publisher.urlhttps://doi.org/10.1111/ele.14444
dc.subjectAging
dc.subjectDemography
dc.subjectDuckweed
dc.subjectLemna
dc.subjectLemnaceae
dc.subjectLemnoideae
dc.subjectLight intensity
dc.subjectLongevity
dc.subjectSenescence
dc.subjectTemporal scaling
dc.subjectCaloric restriction
dc.subjectLifespan in plants
dc.subjectAging in plants
dc.subject.lcshPlants--Aging
dc.titleCaloric restriction extends lifespan in a clonal plant
dc.typeArticle
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