Journal
BIOPHYSICAL JOURNAL
Volume 105, Issue 1, Pages 266-275Publisher
CELL PRESS
DOI: 10.1016/j.bpj.2013.06.001
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Funding
- Kingboard Endowed Professorship in Materials Engineering
- Wilson and Amelia Wong Endowed Professorship in Plant Biotechnology
- Hong Kong PhD Fellowship, Hong Kong SAR Government
- University Postgraduate Fellowship, University of Hong Kong
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A theoretical model based on the water redistribution mechanism is proposed to predict the volumetric strain of motor cells in Mimosa pudica during the seismonastic movement. The model describes the water and ion movements following the opening of ion channels triggered by stimulation. The cellular strain is related to the angular velocity of the plant movement, and both their predictions are in good agreement with experimental data, thus validating the water redistribution mechanism. The results reveal that an increase in ion diffusivity across the cell membrane of < 15-fold is sufficient to produce the observed seismonastic movement.
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