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Table 1 Narrow vegetation indices for phenotyping specific traits in plants

From: High-resolution spectral information enables phenotyping of leaf epicuticular wax in wheat

Narrow vegetation indices Abbreviation Formula Reference
Water index WI \({\rho }_{900} / {\rho }_{970}\) [49]
Photochemical reflectance index PRI-1 \(({\rho }_{531}-{\rho }_{570}) / {(\rho }_{531}+ {(\rho }_{570}\)) [51]
Photochemical reflectance index PRI-2 \(({\rho }_{570}-{\rho }_{539}) / {(\rho }_{570}+ {\rho }_{539}\)) [68]
Red-green index RGI \({\rho }_{690} / {\rho }_{550}\) [76]
Normalized difference water index NDWI \({\rho }_{970} / {\rho }_{900}\) [49]
Carotenoids reflectance index-1 CARI-1 \({\rho }_{510} /{\rho }_{550}\) [55]
Carotenoids reflectance index-2 CARI-2 \((1/{\rho }_{510}) / (1/ {\rho }_{700}\)) [55]
Plant senescence reflectance index PSRI \(({\rho }_{680}-{\rho }_{500}) / {(\rho }_{750}\)) [77]
Normalized pigment chlorophyll index NPCI \(({\rho }_{680}-{\rho }_{430}) / {(\rho }_{680}+ {(\rho }_{430}\)) [69]
Pigment specific simple ratio for chlorophyll-a PSSR-b \({\rho }_{800 } / {\rho }_{650}\) [78]
Pigment specific simple ratio for chlorophyll-b PSSR-a \({\rho }_{800} / {\rho }_{675}\) [78]
Anthocyanin reflectance index-1 ARI-1 \((1/{\rho }_{550}) / (1/ {\rho }_{700}\)) [57]
Anthocyanin reflectance index-2 ARI-2 \({\rho }_{800} (1/{\rho }_{550}) / (1/ {\rho }_{700}\)) [57]
Structure insensitive pigment index SIPI-1 \(({\rho }_{800}-{\rho }_{450}) / {(\rho }_{800}+ {(\rho }_{650}\)) [58]
Structure insensitive pigment index SIPI-2 \({\rho }_{800}-{\rho }_{440}) / {(\rho }_{800}+ {(\rho }_{680})\) [58]