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Updated: Jun 25, 2025
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Solid Plate-based Dietary Restriction in Caenorhabditis elegans
Published on: May 28, 2011
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Caloric restriction extends lifespan in a clonal plant
Suzanne L Chmilar1, Amanda C Luzardo1, Priyanka Dutt1
1Department of Biological Sciences, University of Lethbridge, Lethbridge, Alberta, Canada.
Ecology Letters
|May 30, 2024
Summary
Caloric restriction (CR) extends lifespan in plants, similar to animals. Reducing light intensity to mimic CR in plants like Lemna minor significantly increased their lifespan through temporal scaling.
Area of Science:
- Plant biology
- Aging research
- Photosynthesis
Background:
- Dietary caloric restriction (CR) is known to extend lifespan in animals.
- In plants, caloric intake is derived from photosynthesis, influenced by light intensity.
- The effect of CR on plant lifespan remains largely unexplored.
Purpose of the Study:
- To investigate whether caloric restriction (CR) extends lifespan in plants.
- To determine if reduced light intensity, mimicking CR, impacts plant longevity.
- To explore the quantitative relationship between light intensity, photosynthesis, and plant lifespan.
Main Methods:
- Experiments were conducted on the aquatic macrophyte Lemna minor.
- Individuals were subjected to varying light intensities using neutral-density filters to induce CR.
- Lifespan and photosynthetic rates were tracked longitudinally in hundreds of individuals.
Main Results:
- CR significantly increased the lifespan of Lemna minor individuals.
- Lifespan extension followed a process termed temporal scaling.
- The magnitude of lifespan extension correlated with light intensity and photosynthetic rates, consistent with Michaelis-Menten kinetics and a power law relationship.
Conclusions:
- CR-mediated lifespan extension is applicable to photosynthetic autotrophs, not just heterotrophs.
- Reduced light intensity can quantitatively predict plant aging trajectories.
- This study highlights a conserved mechanism of aging across different life forms.
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