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1 April 2003 The Effects of pH, Temperature, Light Intensity, Light Quality,and Moisture Levels on Spore Germination in Cheilanthes feei of Southeast Missouri
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Abstract

Cheilanthes feei is a xerophytic fern that is broadly distributed throughout the United States west of the Mississippi. Although it has a broad distribution, it occupies a very narrow niche. In southeast Missouri, C. feei inhabits crevices of limestone bluffs, in full sun, approximately 0.5–1.0 m from the top of the bluffs. The physiological basis for the fern's restriction to this xeric environment is unclear. In this study, C. feei spores were subjected to a broad range of temperatures, pH, and light intensities, to varied light qualities, and to different moisture levels. Results indicate that C. feei spores can germinate under a wide variety of conditions. However, data suggest that spore germination optima and optimal conditions for protonemal growth overlap narrowly. The disparity in optimum conditions may be a partial basis for the broad distribution and narrow niche of C. feei.

Sarah L. Nondorf, Melissa A. Dooley, Maria Palmieri, and Lucinda J. Swatzell "The Effects of pH, Temperature, Light Intensity, Light Quality,and Moisture Levels on Spore Germination in Cheilanthes feei of Southeast Missouri," American Fern Journal 93(2), 56-69, (1 April 2003). https://doi.org/10.1640/0002-8444(2003)093[0056:TEOPTL]2.0.CO;2
Published: 1 April 2003
JOURNAL ARTICLE
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