Abstract:

Centrifugation of living pollen mother cells of Lilium henryi has permitted the modifications of complex walls developed on the four daughter microspores. This experimental approach has not only provided an insight into the mechanism by which patterning is established, but has also identified the stages in cell development when wall determinants are present. These determinants can be first detected late in the meiotic prophase, but are not necessarily active at the cell surface at this early ...

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