Viscosity of the sap (typically 5 times greater than that of water)

Range ~5 mPaхs
Organism Plants
Reference Kaare H. Jensen & Maciej A. Zwieniecki, Physical Limits to Leaf Size in Tall Trees, Physical review letters, PRL 110, 018104 (2013) DOI: 10.1103/PhysRevLett.110.018104 p.3 left column top paragraphPubMed ID23383844
Primary Source Jensen KH, Mullendore DL, Holbrook NM, Bohr T, Knoblauch M, Bruus H. Modeling the hydrodynamics of Phloem sieve plates. Front Plant Sci. 2012 3: 151. doi: 10.3389/fpls.2012.00151.PubMed ID22811681
Comments "In the stem, phloem sap flows through what is essentially a single cylindrical tube of radius r and length h, so the stem resistance is Rstem=8?h(pr^4), where ? is the viscosity of the sap, typically 5 times greater than that of water, ?~5 mPa s (primary source)"
Entered by Uri M
ID 108683