Abstract
SUMMARYThe megasporocyte is evidently polarized: the nucleus is displaced in the micropylar area, while at the chalazal the organelles are crowded; the smooth endoplasmic reticulum and the leuco-amyloplasts are abundant, and consequently a high starch content is present. The meiosis I produces two cells which differ from one another as regards cytoplasm contents, as the chalazal cell inherits almost the whole cytoplasm of the megasporocyte. The meiosis II takes place with a longitudinal spindle in the chalazal cell, while the micropylar cell soon degenerates. The gametophyte is dimegasporic: through the vacuolization process a two-nucleate gametophyte is directly produced. At the same time the reserve starch spreads through the whole gametophyte, especially in the micropylar area.
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