Computational analysis of fluorescence induction curves in intact spinach leaves treated at different pH

Effects of change in pH have been investigated on spinach leaf discs by measuring fluorescence induction kinetics using plant efficiency analyzer (PEA). On the basis of computational analysis of the results, we have reported that acidic pH causes a significant inhibition of the donor and the acceptor side of PS II. Energy flux models have been presented using the software Biolyzer HP 3. Effects of pH were investigated on the antenna size heterogeneity of PS II and a relative change in the proportions of alpha, beta, and gamma centers was observed. (C) 2010 Elsevier Ireland Ltd. All rights reserved.