Fig 1. Schematic representation of the JIP-test expressed in terms of sequential energy fluxes from absorbance (ABS) of photons by PSII antenna, intermediate trapping flux (TR), electron transport (ET) and the reduction of the end-electron acceptors at the PS I electron acceptor side (RE) driven by PS I.

Formulae and glossary of terms used by the JIP-test are presented in Table 1.