caa a22 4500 475817478 CHVBK 20180406123812.0 cr unu---uuuuu 170329e20000101xx s 000 0 eng 10.1007/s004970050003 doi (NATIONALLICENCE)springer-10.1007/s004970050003 Rottenberg A. Department of Evolution, Systematics and Ecology The Hebrew University, Jerusalem, 91904, Israel, IL aut Fertility of exceptional bisexual individuals in four dioecious plant species [Elektronische Daten] [A. Rottenberg] Abstract : Exceptional, very rare, bisexual (hermaphroditic or monoecious) individuals have been detected in strictly dioecious populations of Rhamnus alaternus, R. palaestinus, Bryonia syriaca and Populus euphratica (a single individual in each species). While ordinary male plants in each species exhibited fully normal pollen, and female individuals set a considerable amount of fruit, the exceptional bisexual plants showed a reduction in male or female fertility, or both. This inability of the rare bisexual individuals to fully invest in the two genders suggests that trade-offs between male and female functions possibly play a major role in the breeding systems of these dioecious species, and probably implicates resource allocation (among other factors) as a selective force in the evolution of dioecy. Springer-Verlag Berlin Heidelberg, 2000 Key words Dioecy nationallicence Monoecy nationallicence Sex determination nationallicence Breeding systems nationallicence Resource allocation nationallicence https://doi.org/10.1007/s004970050003 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s004970050003 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Rottenberg A. Department of Evolution, Systematics and Ecology The Hebrew University, Jerusalem, 91904, Israel, IL aut Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer