Comments |
"The possible existence of aqueous pores in plant membranes was discussed in
the early 1960s by Ray (92) and Dainty (14). To investigate this possibility,
Gutknecht (28) determined the Pf/Pd ratio of Valonia cells. Its value close to
unity and the low measured value of Pf of these cells (2.4X10^-4cmXs^-1
Table 1) suggested the absence of aqueous membrane pores. Probably because
of the well-recognized artifacts caused by unstirred layers in such an experiment
(14), this was, until recently (34), the only report of Pf/Pd in a plant
membrane (Table 1)." "Pd: Diffusional water permeability coefficient Pf: osmotic water permeability coefficient." See notes beneath table |