WB01343_.gif (599 bytes)    The Seed-2   WB01345_.gif (616 bytes)

Capsella is used as a model for Dicot Embryo development and helps to show the dynamic relationship between the Embryo and the Endosperm.

A relatively large liquid Endosperm develops following double fertilization. It becomes cellular and is eventually metabolized by the Embryo such that there is very little Endosperm in the mature Seed.

The Mature Capsella Seed is illustrated below.

   CapsMatureEmbEndoTstaLab300.jpg (108475 bytes)

The Seed consists of a
Seed Coat (Testa)
Endosperm
Embryo

 

The Embryo consists of CapsMatureEmb-240Lab.jpg (95429 bytes)
Root Apical Meristem (RAM)
Hypocotyl
Shoot Apical Meristem (SAM)
Two Cotyledons (Dicot)

 

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