WebReflectance changes at 531 nm, associated with the zeaxanthin-antheraxanthin-violaxanthin interconversion and the related thylakoid energization, are widespread among plant species. We evaluated an index based on 531 nm reflectance {'PRI', Photochemical Reflectance Index, calculated as (i^ssj —^,s7o)/(^,^3i+ ^5711)) ^^ ^" indicator of WebMay 31, 2024 · Because the reflectance at 531 nm is sensitive to carotenoid pigments and the xanthophyll cycle, the photochemical reflectance index (PRI) with a reference wavelength at 570 nm was put forward in ...
The Photochemical Reflectance Index (PRI) as a water-stress index
WebDec 24, 2008 · Photosynthetic reflectance index was not closely related to Car/Chl ratio, while a structural-independent pigment index was not greatly altered by leaf development or species. Accordingly, it is suggested that the high concentration of anthocyanin, higher NPQ and Car/Chl ratio in juvenile leaves are important functional responses to cope with ... Websensing using the photochemical reflectance index (PRI), which provides a direct method of assessing changing LUE over short time spans (18–20). However, over annual time periods, the pri-mary driver of the PRI at leaf and canopy scales is the changing leaf carotenoid pigment pool, typically expressed as the changing gps wilhelmshaven personalabteilung
Relationship between Light Use Efficiency and Photochemical Reflectance …
WebNov 1, 1997 · The photochemical reflectance index (PRI), derived from narrow-band reflectance at 531 and 570 nm, was explored as an indicator of photosynthetic radiation … WebNov 26, 2024 · The maximum rate of carboxylation in leaves (Vcmax) is an important parameter used to determine the photosynthetic rate. An accurate estimation of Vcmax is … WebFeb 15, 2011 · Among them, the Photochemical Reflectance Index (PRI) derived from narrow-band spectroradiometers is a spectral index increasingly being used as an indicator of photosynthetic efficiency. ... but several studies showed that PRI can still function as a seasonal photosynthetic indicator at the ecosystem level in closed canopies (Fig. 5) … gps wilhelmshaven