Home page > EN > 4. Reproduction in Angiosperms > 2. Ovule and Embryo sac > Angiosperm Ovule

Angiosperm Ovule

Sunday 24 October 2004, by Rebecca, www.botanique.org

All the versions of this article: [English] [français]

Angiosperm ovule is contained inside a carpel that is homologue to a macrosporophyll.

Going inwards the ovule is made of:

- Two integuments, the outer one being vascular. At the ovule apex, there is a tiny opening in integuments called micropyle.

- The nucellus is a diploid parenchymatous tissue, surrounded by integuments and containing the embryo sac. If the nucellus is thin, the ovule is tenuinucellate; if it is thick, it is crassinucellate.

- The embryo sac, the female gametophyte, is made of 8 haploids cells.

Attached documents