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Plant Physiology 82:230-235 (1986)
© 1986 American Society of Plant Biologists

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Articles

Factors Influencing Spore Germination and Early Gametophyte Development in Anemia mexicana and Anemia phyllitidis1

Joan E. Nester2 and Ronald C. Coolbaugh

Department of Botany, Iowa State University, Ames, Iowa 50011

Spores of Anemia mexicana Klotzsch and Anemia phyllitidis (L.) Swartz were tested comparatively to investigate the effects of various treatments on spore germination and early gametophyte development in light and darkness. The optimum pH for induction of spore germination is approximately 6. Both species have a minimum 8 hour light insensitive preinduction phase for spore germination. An additional 8 to 12 hours of light are needed to induce 50% germination in A. phyllitidis while at least 24 hours of light are needed for A. mexicana spores. A. phyllitidis has greater sensitivity to the four gibberellic acids tested (GA3, GA4, GA7, and GA13) than A. mexicana for induction of spore germination in darkness. In both species the greatest response was observed with GA4 and GA7. GA13 was clearly the least effective. Gametophytes of each species are 100 times more sensitive to their own antheridiogen than to the antheridiogen of the other species. AMO-1618 (1 millimolar), fenarimol (1 mM), and ancymidol (0.1 mM) had essentially no effect on light-induced germination. The latter two did, however, inhibit gametophyte development.

2 Present address: MSU-DOE Plant Research Laboratory, Michigan State University, East Lansing, MI 48824

1 Supported by National Science Foundation grants PCM 8016237 and PCM 8415924.






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Copyright © 1986 by the American Society of Plant Biologists