caa a22 4500 463160347 CHVBK 20180406164745.0 cr unu---uuuuu 170326e20071201xx s 000 0 eng 10.1007/s10535-007-0151-4 doi (NATIONALLICENCE)springer-10.1007/s10535-007-0151-4 Marques da Silva J. Faculdade de Ciências, Departamento de Biologia Vegetal/Centro de Engenharia Biológica Edifício C2, Universidade de Lisboa, Piso 4, Campo Grande, 1749-016, Lisboa, Portugal aut Chlorophyll fluorescence parameters of three Mediterranean shrubs in a summer-autumn period in central Portugal [Elektronische Daten] [J. Marques da Silva] The photosynthetic performance of Cistus crispus, Centaurea africana and Thymus villosus, three shrubs of the Mediterranean-type maquis vegetation of Central Portugal, were studied between July and December 2003 by means of in vivo chlorophyll a fluorescence measurements. In C. africana total leaf decay occurred between August and October, in T. villosus no clear pattern of variation of the basal fluorescence (Fo) was observed, and in C. crispus an increase of this parameter was observed in late autumn. In all species, the limitation to photosynthesis by photoinhibition and the contribution of non-reversible processes to total photoinhibition were more pronounced in the summer than in the autumn. However, a pronounced decrease of the effective quantum yield of photosystem 2 (ΦPS2) was found in late autumn, probably due to a decrease of the carboxylation efficiency of the Calvin-Benson cycle, which was also supported by a parallel decrease of the photochemical quenching coefficient (qP). Institute of Experimental Botany, ASCR, 2007 Centaurea africana nationallicence Cistus crispus nationallicence Mediterranean climate nationallicence photoinhibition nationallicence photosynthetic performance nationallicence Thymus villosus nationallicence F0 : basal fluorescence nationallicence qF0 : quenching of basal fluorescence nationallicence qP : photochemical quenching nationallicence qN : non-photochemical quenching nationallicence Sm : normalized area above the fluorescence rise curve nationallicence ΦPS2 : effective quantum yield of PS 2 photochemical energy conversion nationallicence Biologia Plantarum Springer Netherlands 51/4(2007-12-01), 741-745 0006-3134 51:4<741 2007 51 10535 https://doi.org/10.1007/s10535-007-0151-4 text/html Onlinezugriff via DOI 1 brief-communication jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10535-007-0151-4 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Marques da Silva J. Faculdade de Ciências, Departamento de Biologia Vegetal/Centro de Engenharia Biológica Edifício C2, Universidade de Lisboa, Piso 4, Campo Grande, 1749-016, Lisboa, Portugal aut NATIONALLICENCE 773 0- Biologia Plantarum Springer Netherlands 51/4(2007-12-01), 741-745 0006-3134 51:4<741 2007 51 10535 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer