The morphology of grain abscission in Zizania aquatica.

H. B. Hanten, G. E. Ahlgren, J. B. Carlson

Research output: Contribution to journalArticlepeer-review


The anatomical development of the abscission zone in grains of Z. aquatica was correlated with development of the embryo. The abscission zone was well developed when the embryo sac was mature. Soon after pollination, the 1st anatomical evidence of abscission appeared as plasmolysis of the separation layer parenchyma cells. This was followed by separation of the layers by dissolution of the middle lamella and fragmentation of cell walls. It is suggested that persistence of intact vascular tissue and the presence of a surrounding cone-shaped mass of lignified cells may be involved in abscission of wild rice grains.
Original languageEnglish (US)
Pages (from-to)2269-2273
Number of pages5
JournalCanadian Journal of Botany
Issue number21
StatePublished - 1980


  • grain
  • abscission


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