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Related Experiment Video

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Resurrection of Dormant Daphnia magna: Protocol and Applications

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Published on: January 19, 2018

A Decrease in Ambient Temperature Induces Post-Mitotic Enlargement of Palisade Cells in North American Lake Cress.

Rumi Amano¹, Hokuto Nakayama^1,2, Yurika Morohoshi³

¹Department of Bioresource and Environmental Sciences, Kyoto Sangyo University, Kyoto-City, Kyoto, Japan.

|November 17, 2015

Summary

Environmental temperature shifts can trigger cell compensation in plants, a process previously only observed in lab conditions. This finding suggests cell size regulation is a universal mechanism across flowering plants.

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Area of Science:

Plant developmental biology
Morphogenesis
Environmental physiology

Background:

Multicellular organisms regulate organ size through cell proliferation and post-mitotic cell expansion.
Compensation, defined as post-mitotic cell expansion compensating for reduced cell numbers, has been observed in Arabidopsis but only under artificial conditions (mutants, transgenics, gamma-ray treatment).
The natural occurrence and universality of compensation in plants remained unclear.

Purpose of the Study:

To investigate whether compensation occurs in plants under natural environmental conditions.
To determine if temperature shifts can induce compensation in a plant species other than Arabidopsis.
To explore the shared mechanisms of compensation between different plant species.

Main Methods:

Studied compensation in Rorippa aquatica, a semi-aquatic plant.
Manipulated ambient temperature to observe its effect on plant development.
Analyzed cell proliferation and expansion in response to temperature changes.

Main Results:

A shift in ambient temperature was shown to induce compensation in Rorippa aquatica.
This demonstrates that compensation can occur under natural environmental conditions.
The findings suggest a shared, partially conserved mechanism for compensation between R. aquatica and Arabidopsis.

Conclusions:

Compensation is a universal phenomenon in angiosperms, not limited to laboratory-induced conditions.
Environmental factors, such as temperature, play a role in regulating plant organ size through compensation.
The molecular mechanisms underlying compensation are conserved across different plant species, including Arabidopsis and Rorippa aquatica.