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Annals of Botany 73: 587-593, 1994
© 1994 Annals of Botany Company

Spore Germination and Gametophyte Development in Three Species of Asplenium

Emilia Pangua, Stuart Lindsay and Adrian Dyer

Institute of Cell and Molecular Biology, University of Edinburgh, King's Buildings, Mayfield Road, Edinburgh EH9 3JH, UK

Laboratory and field experiments involving Asplenium ruta-muraria L., Asplenium trichomanes L. subsp. quadrivalens D.E. Meyer emend. Lovis and Asplenium scolopendrium L. [= Phyllitis scolopendrium (L.) Newm.] revealed differences in their temperature requirements for germination and in their sexual development on soil. The germination responses of A. trichomanes and A. scolopendrium to culture temperatures of 10, 15, 20 and 25 °C were very similar and all spores were able to germinate at 10 °C. Spores of A. ruta-muraria differed in that germination was slower at 15-25 °C and very much delayed, or even inhibited, at 10 °C. Both laboratory and field cultures of A. trichomanes and A. scolopendrium produced male, female and bisexual gametophytes whereas those of A. ruta-muraria produced only males and bisexuals. The ecological significance of these differences is discussed.Copyright 1994, 1999 Academic Press

Fern, Asplenium ruta-muraria, Asplenium trichomanes, Asplenium scolopendrium, Phyllitis scolopendrium, spore germination, gametophyte, reproductive biology, temperature effects, field experiments


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