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1 March 2001 Sex-Specific Germination Response in the Liverwort Sphaerocarpos texanus (Sphaerocarpaceae)
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Abstract
The sexually dimorphic liverwort, Sphaerocarpos texanus, can be used to study changes in sex ratios in a cohort of individuals during different life stages, from spore development to germination to senescence. Recent attempts to germinate spores under controlled conditions have been successful. This study used laboratory-derived spores to detect subtle sex-specific differences in germination in a cohort of spores across different dormancy breaking temperatures. Sex ratios were determined for subsets of sporelings held at 35/20, 30/15, and 25/15°C for one to eight wk. Sex ratios were female biased for spores that lost dormancy in the 25/15°C and when the data were pooled across the three dormancy breaking thermoperiods. This pattern coupled with the potential for spore banks formation in S. texanus can lead to a single cohort of spores influencing the sporeling sex ratios across seasons.
and D. Nicholas McLetchie "Sex-Specific Germination Response in the Liverwort Sphaerocarpos texanus (Sphaerocarpaceae)," The Bryologist 104(1), (1 March 2001). https://doi.org/10.1639/0007-2745(2001)104[0069:SSGRIT]2.0.CO;2
Received: 18 March 1997; Accepted: 1 August 2000; Published: 1 March 2001
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