Fig. 4.

Effects of DCMU and MV treatment and recovery on energy distribution and electron transport rate in photosystems of tomato leaves under HH

(a) Quantum efficiency of PSII photochemistry (Y _II); (b) Electron transport rate of PSII (ETR_II); (c) The quantum yield of regulated energy of PSII (Y _NPQ); (d) Quantum yield of non-regulated energy of PSII (Y _NO); (e) The effective photochemical quantum yield of PSI (Y _I); (f) Electron transport rate of PSI (ETR_I); (g) Acceptor side limitation of PSI (Y _NA); (h) Donor side limitation of PSI (Y _ND). The left side of the dotted line is different treatments and the other side is the treatments of recovery. Data are means of six repetitions with standard errors demonstrated by vertical bars. ^* and ^** represent significant and highly significant differences (P≤0.05 and P≤0.01), respectively