caa a22 4500 477039219 CHVBK 20180405111312.0 cr unu---uuuuu 170330e19960301xx s 000 0 eng 10.1007/BF00985919 doi (NATIONALLICENCE)springer-10.1007/BF00985919 Change in floral nectar components from fresh to senescent flowers of Capparis spinosa ( Capparidaceae ), a nocturnally flowering Mediterranean shrub [Elektronische Daten] [T. Petanidou, A. Van Laere, E. Smets] We studied the nectar characteristics in relation to flower age of the summer flowering Mediterranean shrubCapparis spinosa in three localities in Southern Greece. Anthesis was nocturnal. Nectar volume, concentration, and sucrose/hexose ratio varied with site, year, and between individual plants; amino acid concentration varied only with site. The sucrose/hexose ratio decreased considerably with flower age, while the glucose/fructose ratio remained constant (ca. 1), implying that nectar sucrose broke down in the course of anthesis. Sugar breakdown increased with water content of nectar. Amino acid concentration was strongly age-dependent: It was low in fresh flowers, relatively high in middle-aged ones (except aspartic acid that was extremely increased), and very high in senescent ones. We attribute the amino acid changes to phenomena related to flower senescence in the dark. Springer-Verlag, 1996 Capparidaceae nationallicence Capparis nationallicence Nectar volume nationallicence nectar concentration nationallicence sugars nationallicence amino acids nationallicence aspartic acid nationallicence flower age nationallicence flower senescence nationallicence nocturnal anthesis nationallicence Mediterranean ecosystems nationallicence phrygana nationallicence Petanidou T. Botanical Institute, Laboratory of Systematics, Catholic University of Leuven, Kardinaal Mercierlaan 92, B-3001, Heverlee (Leuven), Belgium aut Van Laere A. Botanical Institute, Laboratory of Developmental Biology, Catholic University of Leuven, Kardinaal Mercierlaan 92, B-3001, Heverlee (Leuven), Belgium aut Smets E. Botanical Institute, Laboratory of Systematics, Catholic University of Leuven, Kardinaal Mercierlaan 92, B-3001, Heverlee (Leuven), Belgium aut Plant Systematics and Evolution Springer-Verlag 199/1-2(1996-03-01), 79-92 0378-2697 199:1-2<79 1996 199 606 https://doi.org/10.1007/BF00985919 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00985919 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Petanidou T. Botanical Institute, Laboratory of Systematics, Catholic University of Leuven, Kardinaal Mercierlaan 92, B-3001, Heverlee (Leuven), Belgium aut NATIONALLICENCE 700 1- Van Laere A. Botanical Institute, Laboratory of Developmental Biology, Catholic University of Leuven, Kardinaal Mercierlaan 92, B-3001, Heverlee (Leuven), Belgium aut NATIONALLICENCE 700 1- Smets E. Botanical Institute, Laboratory of Systematics, Catholic University of Leuven, Kardinaal Mercierlaan 92, B-3001, Heverlee (Leuven), Belgium aut NATIONALLICENCE 773 0- Plant Systematics and Evolution Springer-Verlag 199/1-2(1996-03-01), 79-92 0378-2697 199:1-2<79 1996 199 606 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer