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Brazilian Journal of Botany

Print version ISSN 0100-8404On-line version ISSN 1806-9959


BIANCHI, MARTA B.  and  GIBBS, PETER E.. Late-acting self-incompatibility in Capparis retusa (Capparaceae), a species of Chaco woodland in NE Argentina. Rev. bras. Bot. [online]. 2000, vol.23, n.4, pp.395-400. ISSN 0100-8404.

The reproductive biology of Capparis retusa was studied by means of controlled pollination experiments and fluorescence microscopy observations of post-pollination events. Self-pollinated flowers mostly failed to form fruits despite the fact that self-pollen tubes grew to the ovary and penetrated ovules within 24 h. Since embryo development to globular stage was observed in some self-fertilized ovules it was concluded that control of self-fertilization in this species occurs by some kind of post-zygotic mechanism.

Keywords : Breeding system; ovarian sterility.

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