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 Supported, in part, by the National Science Foundation - Division of Undergraduate Education
Development of C-Fern is supported
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Copyright © 1997-2000
Thomas R. Warne and
Leslie G. Hickok.
All rights reserved.
 C-Fern Sport Report

 
Hermaphroditic and male C-Fern gametophytes
highly male (him1)


Initial characterization of this EMS-induced mutation suggests that it is highly sensitive to the pheromone, ACe. Isolates of C-Fern gametophytes typically always develop as hermaphrodites. In contrast, him1 types can spontaneously develop as males in isolate culture and there are correspondingly higher numbers of males in multispore cultures. In addition, him1 hermaphrodites tend to have much higher numbers of antheridia, especially as they age. The higher numbers of males and antheridia combine to produce cultures that have the capacity to produce many sperm that can be observed in large masses.

Banks, J. A., L. Hickok and M. A. Webb. 1993. The programming of sexual phenotype in the homosporous fern, Ceratopteris richardii. Int. J. Plant Sci. 154:522-534

Banks, J. A. 1997. Sex determination in the fern Ceratopteris. Trends in Plant Science 2:175 – 179.

Warne, T. R., L. G. Hickok and R. J. Scott. 1988. Characterization and genetic analysis of antheridiogen insensitive mutants in Ceratopteris richardii. Bot. J. Linn. Soc. 96: 371-379.