leaf_photosynthesis_Vcmax_per_area

Label: Leaf Vcmax per unit leaf area (Vcmax)
Entity URI: https://w3id.org/APD/traits/trait_0020413
Type: numeric
Definition: Maximum [NCIT:C25564] carboxylation [MOP:0000591] rate [PATO:0000161] by the Rubisco complex [GO:0048492] in plant leaves [PO:0025034], recorded per unit leaf [PO:0025034] area [PATO:0001323]. The value is a model parameter [STATO:0000034] derived from the initial slope of a photosynthesis [GO:0015979] A-ci response curve, the component that is carbon dioxide [CHEBI:16526] limited and hence limited by Rubisco activity.;The apparent maximum rate of Rubisco (ribulose 1,5-bisphosphate carboxylase/oxygenase) activity carboxylase activity (carboxylation capacity), recorded per unit leaf dry mass. This is a model-derived value, calculated from the portion of an A-ci response curve (curve showing the photosynthetic response to increasing carbon dioxide concentrations) at low carbon dioxide concentrations. This is the portion of the curve where the photosynthetic rate is limited by the Rubisco activity.
Additional comments: This trait is explicitly for Vcmax per leaf area measurements made at a temperature other than 25 deg C. It is essential to record measurement temperature as a context property as Vcmax is very sensitive to changes in temperature. Measurements made at 25 deg C should be mapped to `leaf_photosynthesis_Vcmax_per_area_25C`
units: umol{CO2}/m2/s
allowable range: 10 - 300 umol{CO2}/m2/s

See the AusTraits Plant Dictionary (https://w3id.org/APD/traits/trait_0020413) for additional information about this trait.

Coverage

For this trait, AusTraits includes a total of 304 records. This includes: