caa a22 4500 475806514 CHVBK 20180406123748.0 cr unu---uuuuu 170329e20000301xx s 000 0 eng 10.1007/BF00985330 doi (NATIONALLICENCE)springer-10.1007/BF00985330 Reproductive biology of Wahlenbergia (Campanulaceae) endemic to Robinson Crusoe Island (Chile) [Elektronische Daten] [G. Anderson, G. Bernardello, P. S. Lopez, D. Crawford, T. Stuessy] The reproductive biology ofW. berteroi, W. fernandeziana, and a putative hybrid betweenW. fernandeziana andW. grahamiae, endemic to Robinson Crusoe Island (Juan Fernández archipelago, Chile) was studied. Flowers are hermaphroditic, protandrous, offer nectar, and exhibit secondary pollen presentation involving pollen collecting hairs on the style. These features imply allogamy and biotic pollination. However, male and female phases overlap and no effective pollinators were observed. Experimental data indicate these taxa are self-compatible and facultatively autogamous, a conclusion also suggested by the pollen/ovule ratios. Selfing is accomplished when the stigmatic lobes reflex and touch the style, except forW. berteroi where they do not reflex completely. Autogamy is accomplished in the latter when pollen grains deposited on the inner surface of the corolla throat by the "pollen brush” are gathered by stigmatic lobes when shaken by wind. The degree of autogamy, and perhaps self-compatibility, seems to be inconstant, as implied by the variable natural seed set (overall range 21-188 seeds per fruit). A mixed mating system — primarily outcrossing/entomophilous, but also autogamous — must have been present in the continental ancestors of these taxa. Autogamy promoting self-fertilization is important now — on an island with scarce pollinators — and in the past — when the first founders arrived. Springer-Verlag, 2000 Angiosperms nationallicence Campanulaceae nationallicence Wahlenbergia nationallicence Breeding system nationallicence pollination nationallicence pollen collecting hairs nationallicence autogamy nationallicence self-compatibility nationallicence nectar nationallicence island biology nationallicence Juan Fernández Islands nationallicence Anderson G. Department of Ecology and Evolutionary Biology, 06269-3043, Storrs, CT, USA aut Bernardello G. Instituto Multidisciplinario de Biología Vegetal, C. C. 495, 5000, Córdoba, Argentina aut Lopez P. S. Casilla 1340, Concepción, Chile aut Crawford D. Department of Evolution, Ecology and Organismal Biology, Ohio State University, 43210, Columbus, OH, USA aut Stuessy T. Institute of Higher Plant Systematics and Evolution, Institute of Botany, University of Vienna, Rennweg 14, A-1030, Vienna, Austria aut Plant Systematics and Evolution Springer-Verlag 223/1-2(2000-03-01), 109-123 0378-2697 223:1-2<109 2000 223 606 https://doi.org/10.1007/BF00985330 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00985330 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Anderson G. Department of Ecology and Evolutionary Biology, 06269-3043, Storrs, CT, USA aut NATIONALLICENCE 700 1- Bernardello G. Instituto Multidisciplinario de Biología Vegetal, C. C. 495, 5000, Córdoba, Argentina aut NATIONALLICENCE 700 1- Lopez P. S. Casilla 1340, Concepción, Chile aut NATIONALLICENCE 700 1- Crawford D. Department of Evolution, Ecology and Organismal Biology, Ohio State University, 43210, Columbus, OH, USA aut NATIONALLICENCE 700 1- Stuessy T. Institute of Higher Plant Systematics and Evolution, Institute of Botany, University of Vienna, Rennweg 14, A-1030, Vienna, Austria aut NATIONALLICENCE 773 0- Plant Systematics and Evolution Springer-Verlag 223/1-2(2000-03-01), 109-123 0378-2697 223:1-2<109 2000 223 606 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer