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- Title
Contraction behaviors of Vorticella sp. stalk investigated using high-speed video camera. I: Nucleation and growth model.
- Authors
Junko Kamiguri; Noriko Tsuchiya; Ruri Hidema; Masatoshi Tachibana; Zenji Yatabe; Masahiko Shoji; Chihiro Hashimoto; Pansu, Robert Bernard; Hideharu Ushiki
- Abstract
The contraction process of living Vorticella sp. has been investigated by image processing using a high-speed video camera. In order to express the temporal change in the stalk length resulting from the contraction, a damped spring model and a nucleation and growth model are applied. A double exponential is deduced from a conventional damped spring model, while a stretched exponential is newly proposed from a nucleation and growth model. The stretched exponential function is more suitable for the curve fitting and suggests a more particular contraction mechanism in which the contraction of the stalk begins near the cell body and spreads downwards along the stalk. The index value of the stretched exponential is evaluated in the range from 1 to 2 in accordance with the model in which the contraction undergoes through nucleation and growth in a onedimensional space.
- Subjects
VORTICELLA; PLANT stems; IMAGE processing; HIGH-speed cinematography; NUCLEATION; EXPONENTIAL functions
- Publication
Biophysics (13492942), 2012, Vol 8, p1
- ISSN
1349-2942
- Publication type
Article
- DOI
10.2142/biophysics.8.1