leaf_photochemical_reflectance_index

Label: Photochemical reflectance index (PRI)
Entity URI: https://w3id.org/APD/traits/trait_0020813
Type: numeric
Definition: A remote sensing [EnvThes:21762] index [NCIT:C25390] of the efficiency [PATO:0001029] with which a whole plant [PO:0000003] uses photosynthetically active radiation [ENVO:01001864], calculated from the reflectance [EnvThes:21580] of radiation [ENVO:01001023] off the plant canopy [ENVO:01001242] at 531 nm (a xanthophyll [CHEBI:27325] band) and 570 nm (a reference band): PRI = (R531 - R570) / (R531 + R570). It is recorded with a spectroradiometer [MOSAIC:00000974] and a higher value indicates a higher radiation use efficiency.;Photochemical reflectance index measures plant responses to stress and the efficiency with which it uses photosynthetically active radiation, by indicating changes in carotenoid pigments in live foliage. It is calculated from the reflectance of radiation off the plant canopy at 531 nm (a xanthophyll band) and 570 nm (a reference band): PRI = (R531 - R570) / (R531 + R570), with a higher value indicating higher radiation use efficiency.
Additional comments: None
units: {dimensionless}
allowable range: -1 - 1 {dimensionless}

See the AusTraits Plant Dictionary (https://w3id.org/APD/traits/trait_0020813) for additional information about this trait.

Coverage

For this trait, AusTraits includes a total of 662 records. This includes: