Pressure and solute potentials in stomata

Pressure and solute potentials in stomatal cells of Tradescantia virginiana

Meidner H., Bannister P. (1979)

  1. Hans MEIDNER, University of Stirling Stirling, Scotland 
  2. Peter BANNISTER, University of Stirling Stirling, Scotland

in J Exp Bot 30 255–265. – doi: 10.1093/jxb/30.2.255 –


The postulated mechanical advantage of subsidiary cells over guard cells has been estimated using leaves of Tradescantia virginiana.

The turgor pressures of subsidiary cells were adjusted to be zero or maximal by plasmolytic treatments, and the resulting stomatal apertures were measured. The ‘mechanical advantage’ was calculated from two mathematical models which define it as an ‘antagonism ratio’.

The discussion deals with methods of preparing the tissue, the validity of the plasmolytic treatments, and the function of the antagonism ratio in relation to the Spannungsphase.


Published by

Willem Van Cotthem

Honorary Professor of Botany, University of Ghent (Belgium). Scientific Consultant for Desertification and Sustainable Development.

Leave a Reply

Please log in using one of these methods to post your comment: Logo

You are commenting using your account. Log Out /  Change )

Google+ photo

You are commenting using your Google+ account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )


Connecting to %s