Abstract
Ten accessions of seed of the genus Limnanthes, representing seven species and their varieties, were tested for germination at temperatures of 40°, 50°, 60°, 70° F, and at room temperature varying from 72°–78° F. Four of the ten accessions germinated best at 40°, three at 50°, and three at 60° F. Germination was relatively poor at 70° F and almost zero at room temperature. The total germination averaged over all accessions was about the same for both 40° F and 50° F, slightly less for 60° F. Seeds at 60° F reached a peak in germination rate in four days; those at 50° F required six days; those at 40° F required 11 days. Seeds, started at room temperature and moved to 50° F 15 days later, attained only about half the total germination of a similar group of seeds originlly started at 50° F. Some of the species tested germinated almost equally well at 40°, 50°, or 60° F; others germinated best only at, or near, one of these temperatures. Substantially all of the seeds that germinated over a period of 50 days did so in less than 30 days; most of these germinated in the first 14 days.
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Toy, S.J., Willingham, B.C. Effect of temperature on seed germination of ten species and varieties ofLimnanthes . Econ Bot 20, 71–75 (1966). https://doi.org/10.1007/BF02861928
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DOI: https://doi.org/10.1007/BF02861928