Effects of Shading on Chlorophyll Fluorescence Characteristics in Leaves of Eggplant Seedlings

The chlorophyll fluorescence parameters under different shading treatments were investigated of eggplant seedlings.The results showed that relative to those under full light,non-photochemical quenching coefficient (NPQ),high excitation pressure (1-qP)were decreased;maximum fluorescenc(Fm),photochemical maximum efficiency of PSII(Fv/Fm),potential photochemical efficiency(Fv/Fo),actual photochemical efficiency of PSI (ФPSII),efficiency of excitation captured by open PSII centers (Fv’/Fm’),photochemical quenching coefficient (qP) and the electron transport rate (ETR)in shading environment were increased.The fraction of absorbed light in photochemistry (P)were increased,the fraction of antenna heat dissipation (D)were decreased,while excess energy (E)changed unstable. These results showed that eggplant has self-adjusting and adaptation ability to low light stress,and photochemical efficiency of PSII was. highest under one tier shading treatment and suitable for the growth.