Estimating photosynthetic light-use efficiency using the photochemical reflectance index: variations among species

Functional Plant Biology : FPB
Jianmin Guo, Craig M Trotter

Abstract

Recent studies have shown that the photochemical reflectance index (PRI), derived from narrow waveband reflectance at 531 and 570 nm, can be used as a remote measure of photosynthetic light-use efficiency (LUE). However, uncertainty remains as to the consistency of the relationship between PRI and LUE across species. In this study we examined the relationship between the PRI and various photosynthetic parameters for a group of species with varying photosynthetic capacity. At constant irradiance, for the species group as a whole, the PRI was well correlated with LUE (r2=0.58) and with several other photosynthetic parameters, but best correlated with the ratio of carotenoids to chlorophylls contents (Caro / Chl). Despite the interspecific trends observed, determination of light response functions for the PRI in relation to photosynthetic parameters revealed that species-specific relationships were clearly stronger. For example, r2>0.90 for species-level PRI / LUE relationships. Also, the species-specific light-response data show that the magnitude of the PRI can be related to the magnitude of the saturated irradiance and the rate of CO2 uptake. As demonstrated here, a light response function provides a simple yet precise approach...Continue Reading

Citations

May 26, 2009·Journal of Experimental Botany·Zbynek MalenovskýLadislav Nedbal
Oct 11, 2011·Journal of Experimental Botany·Shawn P SerbinPhilip A Townsend
Apr 18, 2013·Plant, Cell & Environment·Carl J BernacchiAndy Vanloocke
Jan 6, 2009·Journal of Forensic Sciences·Margaret E KalacskaTerry Caelli
Nov 28, 2014·Annals of Botany·Anne-Kristel Bittebiere, Cendrine Mony
Apr 18, 2018·Plant, Cell & Environment·Yulia YarkhunovaCynthia Weinig
Oct 13, 2021·American Journal of Botany·Josefina G CampoyRubén Retuerto

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