Fig. 5
From: Characterization and functional analysis of phytoene synthase gene family in tobacco
Photosystem changes in virus-mediated PSY gene silencing in N. benthamiana. a Carotenoid and chlorophyll content. b Blue-native polyacrylamide gel-electrophoresis analysis of thylakoid membrane protein complex in TRV-PSY1&2 and negative control plants. c Chlorophyll fluorescence difference between TRV-PSY1&2 and negative control plants; the relative levels of each parameter were calculated by setting the value in the negative control as 1. Columns and bars represent the means and standard errors (n = 9), respectively. * indicate P < 0.05. PS I, photosystem I. PS II, photosystem II. CP 43, 43 kD Chlorophyll a binding protein. LHC II, light harvesting complex II. Fv/Fm, maximum quantum efficiency of PSII photochemistry. ΦPSII, sum of the quantum yields of PSII photochemistry. qP, photochemical quenching. NPQ, nonphotochemical quenching