Electron Transport Rate (ETR) including relative ETR, max ETR, and ETR change.
Electron transport rate (ETR), estimated from chlorophyll fluorescence, is a widely-used indicator of photosynthetic activity (Kitao et al., 2021). It is used in pulse amplitude modulated (PAM) technology to calculate photosynthesis as the electron transport rate (ETR) through Photosystem II (PSII) (Ritchie, 2012).
Kitao, M., Yasuda, Y., Kodani, E., Harayama, H., Awaya, Y., Komatsu, M., ... & Agathokleous, E. (2021). Integration of electron flow partitioning improves estimation of photosynthetic rate under various environmental conditions based on chlorophyll fluorescence. Remote Sensing of Environment, 254, 112273. doi: 10.1016/j.rse.2020.112273
Ritchie, R. J. (2012). Photosynthesis in the blue water lily (Nymphaea caerulea Saligny) using pulse amplitude modulation fluorometry. International Journal of Plant Sciences, 173(2), 124-136. doi: 10.1086/663168