Gibberellin-induced Fertility in the Fern Ceratopteris thalictroides (L.) Brongn.
Treatment of the homosporous fern Ceratopteris thalictroides L. sporophyte with gibberellic acid results in fertile fronds appearing 3 to 5 weeks after treatment. The hetero-blastic leaf sequence is markedly reduced, and the entire life cycle can be completed in 3 months on defined medium. Treatment with gibberellic acid also stimulates the accumulation of starch in mature leaves.
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Department of Botany, University of Massachusetts, Amherst, Massachusetts 01002.