Figure 1.

A schema of the registration of electrical and photosynthetic parameters in peas (A) and stages of experiment (B). E_L is a silver electrode, E_R is the reference Ag⁺/AgCl electrode. P_m, F_v, A_CO2, ${\Phi }_{\text{PSI}}^{.}$ and Φ_PSII are the maximal change in the P700 signal, the variable fluorescence, the photosynthetic CO₂ assimilation rate, quantum yields of photosystem I and II, respectively. Indexes “b.h.” and “a.h” mean “before heating” and “after heating.” LER is registration of the local electrical responses.