Figure 2.
Records of burning-induced electrical signals (a) and changes in the quantum yield of photosystem II (ФPSII) and non-photochemical quenching of fluorescence (NPQ) (b) in second and fourth leaves of pea seedlings (n = 6–7). The local burning of the first mature leaf (flame, 3–4 s, approximately 1 cm2) was used for the induction of electrical signals and physiological responses (arrow). Electrical signals were measured by extracellular electrodes; changes in ФPSII and NPQ were measured by the PAM-fluorometer.