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- W645047306 abstract "Kruep, K.J. M.S., Eastern Illinois University. May, 1997. Environmental Requirements for Sporocarp Germination in Marsileaceae. Experiments were conducted on sporocarps of Marsilea quadrifolia L. to determine whether temperature had any influence on the length of the reproductive period and initial sperm emergence from microgametophytes. Data were then compared fo results of similar studies undertaken with the species M. vestita Hooker and Greville to determine whether there was any variation between them. A slight variation was recorded, ranging from 1 to 1.5 hours for initial emergence. An additional set of experiments was performed with 58 year old sporocarps and approximately two-year-old sporocarps of M. quadrifolia. A difference of 2-6.5 hours for initial sperm emergence occurred between the two collections, suggesting that age did have an effect on the onset of emergence. Sperm population life spans were also monitored, as well as individual sperm life spans, and it was found that a range of 25-30°C was the optimum temperature for sperm survival. Variation in sperm population life spans was also shown between the 58 year old and two-year-old collections, with an average range of 1-1.5 hours. Life spans for individual sperm averaged 45 minutes in all experiments." @default.
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- W645047306 date "1997-01-01" @default.
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- W645047306 title "Environmental Requirements for Sporocarp Germination in Marsileaceae" @default.
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