Institute of Biophysics, National Research Council, Via De Marini 6, 16149 Genova, Italy. Institute of Plant Biochemistry and Photosynthesis, Consejo Superior de Investigaciones Cientificas and University of Seville, Seville 41092, Spain. Department of Earth, Environment and Life Sciences (DISTAV) - University of Genoa, Viale Benedetto XV 5, 16132 Genova, Italy.