Water permeabilities of cells and membranes from plants and animals

Range Table - link 10^–4cm/sec
Organism Eukaryotes
Reference Maurel C. Aquaporins and water permeability of plant membranes. Annu Rev Plant Physiol Plant Mol Biol. 1997 Jun48: 399-429. p.406 table 1PubMed ID15012269
Primary Source See pointers to refs on right of table
Method See methods on right of table
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
Entered by Uri M
ID 110401