caa a22 4500 60619357X CHVBK 20210128100910.0 cr unu---uuuuu 210128e20150901xx s 000 0 eng 10.1007/s10682-015-9783-6 doi (NATIONALLICENCE)springer-10.1007/s10682-015-9783-6 Functional modularity in a forcible flower mechanism: relationships among morphology, biomechanical features and fitness [Elektronische Daten] [Silvina Córdoba, Santiago Benitez-Vieyra, Andrea Cocucci] Flowers may be interpreted as complex combinations of organs functionally coordinated to attract pollinators and to mechanically interact with the pollinator's body, particularly when flower mechanisms are actively handled by pollinators. Thus, a functional modularity of traits in keel flowers (Fabaceae) was expected because of a compartmentalization between attraction and mechanical functions. To test this hypothesis, we used Collaea argentina, a Fabaceae that exhibits typical keel flowers. The force needed to open keels, the keel displacement angle and floral morphometric traits in 100 plants from a natural population were measured to detect floral characters correlated with the biomechanical variables. Furthermore, we examined the relationships among this functional module, biomechanical variables and female reproductive success to explore whether these traits are the targets of pollinator-mediated phenotypic selection, and used path analysis to examine the causal relationship among these variables. A functional module formed by two morphometric traits of the petals directly involved in the floral mechanism (keel and wings) was found, but no flag trait was involved in this module. Even though the functional module had a positive effect on force and there were significant relationships between the displacement angle and fruit set, no significant effect of force on female reproductive success was detected. These results question whether selection currently plays a role favouring the integration of this module, but this may be consistent with a past stabilizing selection on the force needed to open the keel. Springer International Publishing Switzerland, 2015 Pollination nationallicence Floral phenotypic selection nationallicence Floral biomechanic traits nationallicence Functional module nationallicence Collaea argentina nationallicence Keel flowers nationallicence Córdoba Silvina Laboratorio de Ecología Evolutiva y Biología Floral, Instituto Multidisciplinario de Biología Vegetal (IMBiV) CONICET- UNC, CC 495, CP 5000, Ciudad de Córdoba, Córdoba, Argentina aut Benitez-Vieyra Santiago Laboratorio de Ecología Evolutiva y Biología Floral, Instituto Multidisciplinario de Biología Vegetal (IMBiV) CONICET- UNC, CC 495, CP 5000, Ciudad de Córdoba, Córdoba, Argentina aut Cocucci Andrea Laboratorio de Ecología Evolutiva y Biología Floral, Instituto Multidisciplinario de Biología Vegetal (IMBiV) CONICET- UNC, CC 495, CP 5000, Ciudad de Córdoba, Córdoba, Argentina aut Evolutionary Ecology Springer International Publishing 29/5(2015-09-01), 719-732 0269-7653 29:5<719 2015 29 10682 https://doi.org/10.1007/s10682-015-9783-6 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10682-015-9783-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Córdoba Silvina Laboratorio de Ecología Evolutiva y Biología Floral, Instituto Multidisciplinario de Biología Vegetal (IMBiV) CONICET- UNC, CC 495, CP 5000, Ciudad de Córdoba, Córdoba, Argentina aut NATIONALLICENCE 700 1- Benitez-Vieyra Santiago Laboratorio de Ecología Evolutiva y Biología Floral, Instituto Multidisciplinario de Biología Vegetal (IMBiV) CONICET- UNC, CC 495, CP 5000, Ciudad de Córdoba, Córdoba, Argentina aut NATIONALLICENCE 700 1- Cocucci Andrea Laboratorio de Ecología Evolutiva y Biología Floral, Instituto Multidisciplinario de Biología Vegetal (IMBiV) CONICET- UNC, CC 495, CP 5000, Ciudad de Córdoba, Córdoba, Argentina aut NATIONALLICENCE 773 0- Evolutionary Ecology Springer International Publishing 29/5(2015-09-01), 719-732 0269-7653 29:5<719 2015 29 10682