Measurement and analysis of tip growth

Charles R. Steele, Jacques Dumais, Sidney L. Shaw

Producción científica: Capítulo del libro/informe/acta de congresoContribución a la conferenciarevisión exhaustiva


Tip growth is basic and deceptively simple. A single cell has a wall that is cylindrical with a prolate spheroid as an end cap. The growth takes place in the end cap. The mechanical loading which drives the growth consists of turgor pressure of magnitude 5-10 atmospheres.We report recent measurements on the geometry of the growth that provide detail of the shape of the end cap. In addition, fluorescent beads were placed at points on the cap, whose positions with time were recorded. A Lagrangian formulation provides the kinematics of the growth process, and indicates that for steadystate, axisymmetric growth, the current velocity of a bead depends on only the geometry and the stretch ratio. The ratio of current mean strain rate to mean stress provides a coefficient of growth rate. This depends on position, which can be interpreted as a dependence on the stretch ratio, i.e., the past history of the wall element. Thus a simple mechanical description appears to be appropriate. However, the stability of the process has not yet been considered.

Idioma originalInglés
Título de la publicación alojadaMechanics in Biology
EditorialAmerican Society of Mechanical Engineers (ASME)
Número de páginas11
ISBN (versión digital)9780791819173
EstadoPublicada - 2000
EventoASME 2000 International Mechanical Engineering Congress and Exposition, IMECE 2000 - Orlando, Estados Unidos
Duración: 5 nov. 200010 nov. 2000

Serie de la publicación

NombreASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE)


ConferenciaASME 2000 International Mechanical Engineering Congress and Exposition, IMECE 2000
País/TerritorioEstados Unidos


Profundice en los temas de investigación de 'Measurement and analysis of tip growth'. En conjunto forman una huella única.

Citar esto