Fig. 4
Physiological parameters under different culture modes. Autotrophic group-24:0 (−Glc), mixotrophic group-24:0 (+Glc), circadian group-6:18 (+Glc), heterotrophic group-0:24 (+Glc). A Fv/Fm changes over time; B the spider-plot presentation of selected photosynthetic parameters on 6th day. Fv/Fm—optimal/maximal quantum yield of PSII, DIo/RC—heat dissipation per active reaction center, ψ0—the efficiency that a trapped exciton can move an electron further than Qa−, φP0—the maximum quantum yield of primary photochemistry, φE0—the maximum yield of electron transport, ETo/RC—the light quantum flux transmitted by the initial electron per active reaction center, ABS/RC—Absorbed light quantum flux per active reaction center; C chlorophyll fluorescence kinetic curve; D respiratory rate change over time