stem_vessel_diameter_hydraulic

Explore the data for this trait in the portal

• Label: Stem xylem vessel hydraulic mean diameter
• Entity URI: https://w3id.org/APD/traits/trait_0013114
• Type: numeric
• Definition: A vascular tissue morphology trait [TO:0000470] which is a weighted arithmetic mean [STATO:0000398] diameter [PATO:0001334] of xylem vessels [PO:0025417] in a stem [PO:0009047], reflecting the greater relative contribution of wider vessels to hydraulic conductivity [EnvThes:22133] as described by the Hagen-Poiseuille equation [hupson:SCAIVPH_00000131] .;Hydraulic diameter (or hydraulically weighted diameter) is a weighted arithmetic mean diameter of xylem vessels in a stem, reflecting the greater contribution of wide vessels to actual hydraulic conductivity. It is based on the Hagen-Poiseuille law, a fluid dynamics equation that describes laminar flow through a tube. It shows that a few large conduits transport an equal amount of water as many small ones, as flow rate is proportional to the 4th power of the conduit's diameter.
• Additional comments: None
• units: um
• allowable range: 1 - 500 um

See the AusTraits Plant Dictionary (https://w3id.org/APD/traits/trait_0013114) for additional information about this trait.

Coverage

For this trait, AusTraits includes a total of 750 records. This includes:

• data for 272 species.
• data for 57 families.
• data from 11 datasets (see the portal Citations tab for a list of sources)