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Updated: Feb 1, 2026
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Monitoring Changes in the Intracellular Calcium Concentration and Synaptic Efficacy in the Mollusc Aplysia
Published on: July 15, 2012
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Increases in Absolute Temperature Stimulate Free Calcium Concentration Elevations in the Chloroplast
Gioia Lenzoni1, Marc R Knight1
1Department of Biosciences, Durham University, South Road, Durham, UK.
Plant & Cell Physiology
|December 6, 2018
Summary
Plants possess chloroplasts that detect high temperatures by increasing stromal calcium. This heat sensing mechanism is crucial for plant survival and adaptation to thermal stress.
Area of Science:
- Plant Physiology
- Molecular Biology
- Biochemistry
Background:
- Plants require mechanisms to sense temperature for survival and adaptation.
- Understanding heat perception in plants is crucial for agricultural resilience.
- Chloroplasts play a vital role in plant cellular processes.
Purpose of the Study:
- To investigate the mechanisms of heat perception in plants.
- To identify how chloroplasts respond to elevated temperatures.
- To characterize the role of calcium signaling in plant thermotolerance.
Main Methods:
- Measuring free calcium concentration in chloroplast stroma and cytosol.
- Analyzing dose-dependent and dynamic calcium responses to temperature.
- Investigating the role of the calcium-sensing receptor (CAS).
Main Results:
- Elevated temperatures induce a specific increase in chloroplast stromal calcium, not cytosolic.
- The chloroplast calcium response is dose-dependent, absolute temperature-dependent, and dynamic.
- Heat-induced calcium signaling is partially regulated by the CAS receptor.
- Plant acclimation to temperature alters the sensitivity of this calcium response.
Conclusions:
- Chloroplasts can sense absolute high temperatures and generate quantitative stromal calcium signals.
- This calcium response is influenced by current temperature and prior stress history.
- The findings reveal a novel mechanism for plant thermoperception and acclimation.
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