Fig. 6. Confocal sections of bga-1 and msi1-2 mutant seeds. (A) In WT seeds at early torpedo stage (emb), peripheral endosperm is cellularised (cpe). The cyst (cy) and small nodules (no) are visible at the posterior pole. (B) In siliques at the same stage, bga seeds show a delay in embryo development, although morphology is normal. Peripheral endosperm is not cellularised and the posterior pole overproliferates. (C) msi1-2 seeds have arrested embryos. Peripheral endosperm is not cellularised and the posterior pole strongly overproliferates. Scale bar: 100 µm (A-C).