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Fig. 3. Comparison of the organisation of the endosperm posterior pole in the WT
and in fis2-3. (A) Confocal section of the endosperm posterior pole
from the abaxial side of a WT seed at the torpedo stage. The endosperm is
cellularised with the exception of the posterior pole that consists of the
cyst containing nuclei with very dense chromatin. (B) In contrast to WT,
fis2 endosperm is not cellularised at the torpedo stage and its
posterior pole consists of a large cyst (c) and multiple large multinucleate
nodules (n). Nuclei in the cyst and in nodules show a chromatin organisation
similar to nuclei in the peripheral endosperm. Scale bars: 20 µm.