Abstract

COSTA NOBRE, DANÚBIA APARECIDA et al. Pre-germination Treatments in Castor Seeds, Cultivar IAC 226. Acta biol.Colomb. [online]. 2013, vol.18, n.3, pp.473-478. ISSN 0120-548X.

The present study aimed to evaluate the efficiency of different pre-germination treatments in castor beans, IAC 226. The experimental design was completely randomized in a factorial 4 x 4 (four temperatures and four immersion times), with four replications. Pre-germination treatments were: immersion in water at room temperature (25 °C) and immersion in hot water at temperatures of 60, 70 and 80 °C for 2, 4, 6 and 8 minutes. Water content of the seeds was determined before treatments. Before and after each treatment, seeds were subjected to germination test, 20-30 °C alternating temperature, determining the percentages of normal and abnormal seedlings, dormant and dead seeds. Independent of time, immersion in 70 °C, water was the most efficient treatment for accelerating germination of castor bean cultivar IAC 226.

Keywords : dormancy; germination; Ricinus communis L.

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