Ovule and seeds development are crucial processes in seed plant reproduction. Most of the studies at molecular level have been focused to describe developmental mechanisms in ovule and seed formation in angiosperms. However, for a complete comprehension of the evolutive trajectories that have led to seed plants, gymnosperms have to be included. In this context, the study of Ginkgo biloba and Taxus baccata has demonstrated that they have ovule and seed peculiar developmental patterns, involving different families of regulator genes.

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