caa a22 4500 475817427 CHVBK 20180406123812.0 cr unu---uuuuu 170329e20000101xx s 000 0 eng 10.1007/s004970050001 doi (NATIONALLICENCE)springer-10.1007/s004970050001 Trimorphic incompatibility in Eichhornia azurea (Pontederiaceae) [Elektronische Daten] [M. Bianchi, J. Vesprini, S. C. H. Barrett] Abstract : Eichhornia azurea (Pontederiaceae) is a mat-forming, clonal aquatic that inhabits lakes, marshes and river systems in many parts of the Neotropics. The species is tristylous with long-, mid-, and short-styled morphs commonly represented in natural populations. To investigate whether E. azurea possesses a trimorphic incompatibility system typical of tristylous species, we conducted a controlled pollination experiment on 15 clones representing the three style morphs from a natural population near Rosario, Argentina. Comparisons of fruit and seed set following self-, illegitimate, and legitimate pollinations clearly demonstrated the presence of trimorphic incompatibility in E. azurea. Self- and illegitimate pollinations produced significantly less fruit and seed than legitimate pollinations in all three style morphs. Pollen from the two anther levels within a flower exhibited contrasting compatibility relations in self-pollinations. In common with several other tristylous species in Pontederiaceae, the expression of self-incompatibility was weakest in the mid-styled morph and strongest in the short-styled morph. We discuss the ecological and evolutionary significance of the partial expression of trimorphic incompatibility in E. azurea. Springer-Verlag Berlin Heidelberg, 2000 Key words Tristyly nationallicence Trimorphic incompatibility nationallicence Pollen trimorphism nationallicence Partial incompatibility nationallicence Clonal aquatic plant nationallicence Bianchi M. Cátedra de Botánica Morfológica y Sistemática, Facultad Ciencias Agrarias, UNR, C.C. No 14-2123, Zavalla, Argentina, AR aut Vesprini J. Cátedra de Biologíca, Facultad Ciencias Agrarias, UNR, C.C. No 14-2123, Zavalla, Argentina, AR aut Barrett S. C. H. Department of Botany, University of Toronto, 25 Willcocks Street, Toronto, Ontario, M5S 3B2, Canada e-mail: Barrett@botany.utoronto.ca, Tel. +1-416-978-4151, Fax +1-416-978-5878, CA aut https://doi.org/10.1007/s004970050001 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s004970050001 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Bianchi M. Cátedra de Botánica Morfológica y Sistemática, Facultad Ciencias Agrarias, UNR, C.C. No 14-2123, Zavalla, Argentina, AR aut NATIONALLICENCE 700 1- Vesprini J. Cátedra de Biologíca, Facultad Ciencias Agrarias, UNR, C.C. No 14-2123, Zavalla, Argentina, AR aut NATIONALLICENCE 700 1- Barrett S. C. H. Department of Botany, University of Toronto, 25 Willcocks Street, Toronto, Ontario, M5S 3B2, Canada e-mail: Barrett@botany.utoronto.ca, Tel. +1-416-978-4151, Fax +1-416-978-5878, CA aut Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer