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The effects of temperature and scarification on seed germination of three dalea species

Schellenberg, M.P., Biligetu, B. (2015). The effects of temperature and scarification on seed germination of three dalea species, 95(6), 1117-1120. http://dx.doi.org/10.4141/CJPS-2015-153

Abstract

© 2015, Agricultural Institute of Canada. All rights reserved. Ecological varieties of North American native plants are used for reclamation or rangeland seeding in Canada. The objectives of the study were to determine the optimum temperature for seed germination and to evaluate the effect of seed scarification on germination of ecological varieties of purple prairie clover [Daleapurpureum (Vent) Rydb.], white prairie clover [Dalea candida (Michx.) Willd.], and a wild collection of hairy prairie clover [Daleavillosa (Nutt.) Spreng var. villosa]. Germination was studied in growth chambers with constant temperatures of 5, 10, 20, and 30ºC for 28 d using a randomized complete block design (RCBD). An additional germination experiment was conducted at 20ºC after seed scarification. Based on days to initiate first germination and final germination, the optimum temperature for germination was 20C for the three species. Final germination was the highest for purple prairie clover (51%), intermediate for white prairie clover (27%), and lowest for hairy prairie clover (5%). Seed scarification increased final germination by around 20% for all three species.

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