Antheridia and Archegonia of the Apogamous Fern Pteris cretica |
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| Authors: | LAIRD, S. SHEFFIELD, E. |
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| Affiliation: | Department of Botany, University of Manchester Oxford Road, Manchester M13 9PL, UK |
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| Abstract: | The external appearance of gametophytes and gametangia of Pteriscretica closely resembled those of sexually reproducing ferns.Antheridia were fully functional but archegonia were not. Despitethe formation of egg, ventral and neck canal cells, the flask-shapedarchegonia failed to open and Pteris spermatozoids failed toexhibit a chemotactic response to them. Cryo SEM revealed thatthe topmost cells of mature archegonia had collapsed, and thisis thought to account for the loss of archegonial function. Pteris cretica, fern, apogamy, antheridia, archegonia, cryo SEM |
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