ISSN:
1615-6110
Schlagwort(e):
Angiosperms
;
Chenopodiaceae
;
Spinacia
;
S. turkestanica
;
S. tetrandra
;
Reproduction
;
multigermicity
;
seedball
;
dioecy
;
evolution
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Biologie
Notizen:
Abstract The presence of multigerm seedballs in the chenopodiacious genusSpinacia is noted. In the wild, colonising, and “weedy” dioecious species,S. turkestanica andS. tetrandra, the distribution of a multigerm seedball could effectively overcome the problem posed by isolation of the sexes. The hypothesis is tested assessing the extent of intra-seedball progeny hybridisations and seed production in the two wild species. The success in seed production by intra-seedball progeny crosses suggests that the distribution of such seedball progeny groups permits not only a percentage survival under isolation of these dioecious plants, but also the colonisation of areas outside that of the parent populations.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1007/BF00983204
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