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Ciencia y Tecnología Agropecuaria

versão impressa ISSN 0122-8706

Resumo

BENITEZ, Sandra Patricia; MARIO, Lobo; DELGADO, Oscar Arturo  e  MEDINA, Clara Inés. Highland papayas Vasconcellea cundinamarcensis and Vasconcellea goudotiana seed germination and dormancy release studies. Corpoica cienc. tecnol. agropecu. [online]. 2013, vol.14, n.2, pp.187-197. ISSN 0122-8706.

Seed germination and dormancy of Vasconcellea cundinamarcensis and V. goudotiana were studied in order to develop procedures for seed embryo emergency. Characterization of viable dormant seeds was done with the tetrazolium test. Long periods of seed fermentation, for sarcotestal removal, affected the seed viability, mainly in V. cundinamarcensis. AG3 and KNO3 application promoted a significantly higher germination, in V. goudotiana, but not in V. cundinamarcensis, in relation to control seeds, fermented during 15 days. AG3 and KNO3 application promoted a significantly higher germination in V. goudotiana, but not in V. cundinamarcensis, in relation to control 15 days fermented seeds. Seed fermentation with Saccharomyces cerevisiae during 36 hours for sarcotest removal, promoted a significant higher germination than that of the control, fermented without enzyme application, mainly in V. goudotiana. Seed fermentation with S. cerevisiae during 36 hours application, for sarcotest removal, promoted a significant higher germination than that of the control, fermented without enzyme application, mainly in V. goudotiana. Seed germination, after S. cerevisiae fermentation and application of AG3 and KNO3, occurred in both species, being obtained the best germination in V. goudotiana, with application of 1000 ppm of GA3 + 2.5% KNO3, with statistical differences, related to the other germination applied treatments. The best germination results, without significant differences, in V. cundinamarcensis were obtained with the application of 600 ppm of GA3 + 2.5% KNO3 or 1000 ppm of GA3 + 1.5% KNO3, after the fermentation procedure with S. cerevisiae.

Palavras-chave : plant growth; embryo emergency; seed viability.

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