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Bidirectional pollination of angiosperm and gymnosperm ovules

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Zenkteler M., Relska-Roszak D.

Acta Biologica Cracoviensia. Series Botanica

2003

tom 45

nr 1

Pollen grains of Pinus wallichiana, P. mugo, P. ponderosa and Ephedra distachya germinated at various intensities on in vitro cultured placentas of 32 angiosperm species. Pollen of the same gymnosperms did not form tubes on stigmas of pistils cultured under the same conditions as the placentas. Pollen of several angiosperms germinated on semi in vitro cultured opened ovules of Larix decidua and nucelli of Taxus baccata. Angiosperm pollen did not germinate in vivo in the pollination drop secreted by ovules of T. baccata. This report shows that (1) gymnosperm pollen produces fully formed tubes on ovules of angiosperms but do not germinate on their stigma, and (2) pollen representing angiosperms is able to germinate and form tubes on ovules of gymnosperms.

Ograniczanie wyników

1 Acta Biologica Cracoviensia. Series Botanica

1 Relska-Roszak D.

1 Zenkteler M.

1 2003

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Bidirectional pollination of angiosperm and gymnosperm ovules