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(American Journal of Botany. 2002;89:1285-1288.)
© 2002 Botanical Society of America, Inc.

Ecology

The 120-yr period for Dr. Beal's seed viability experiment1

Frank W. Telewski2,4 and Jan A. D. Zeevaart3

2W. J. Beal Botanical Garden, Department of Plant Biology, Michigan State University, East Lansing, Michigan 48824 USA; 3Michigan State University Department of Energy-Plant Research Laboratory, and Department of Plant Biology, Michigan State University, East Lansing, Michigan 48824 USA

After 120 yr of burial in moist, well-aerated sand, 23 seeds of Verbascum blattaria and two seeds of a Verbascum sp. germinated and produced normal plants (50% germination for Verbascum). After a 6-wk cold treatment, a single seed of Malva rotundifolia germinated also, producing a normal plant (2% germination). Plants were grown to maturity in a greenhouse, and flowering was induced by exposure to a 6-wk cold treatment. Flowers were artificially pollinated to produce seed of both Verbascum blattaria and Malva rotundifolia. The Verbascum sp. failed to set seed. Collected seeds were subsequently germinated, producing normal plants. F1 seeds of V. blattaria had a germination of 64%. Seeds (6%) of M. rotundifolia germinated after a cold treatment.

Key Words: germination • Malva • seed viability • Verbascum • W. J. Beal




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