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Title: Physiological and isozyme alterations in lettuce seeds under different conditions and storage periods
Other Titles: Alterações fisiológicas e isoenzimáticas em sementes de alface em diferentes condições e períodos de armazenamento
Keywords: Alface - Sementes
Sementes de alface - Armazenamento
Potencial de armazenamento
Lettuce - Seeds
Seeds of lettuce - Storage
Storage Potential
Issue Date: Oct-2016
Publisher: Associação Brasileira de Tecnologia de Sementes
Citation: CATÃO, H. C. R. M. et al. Physiological and isozyme alterations in lettuce seeds under different conditions and storage periods. Journal of Seed Science, Londrina, v. 38, n. 4, p. 305-313, Oct./Dec. 2016.
Abstract: The objective of the study was to determine the physiological and isozyme alterations in lettuce seeds submitted to different conditions and storage periods. We used a completely randomized design with four replications in a factorial arrangement with six lettuce cultivars (Everglades, Babá de Verão, Elisa, Grand Rapids, Hortência and Salinas 88) and four storage periods (30, 60, 90 and 120 days), on three storage rooms (15, 25 and 35 ° C). The physiological quality was evaluated by first and final germination count, emergence, and germination and emergence speed indexes. The isoenzyme expression of catalase (CAT), esterase (EST), alcohol dehydrogenase (ADH) and malate dehydrogenase (MDH) were determined. The physiological quality of lettuce seeds was preserved when stored at 15 ° C room temperature. The high room temperatures associated with higher storage periods cause a reduction in physiological quality and alterations in enzymatic patterns of CAT, EST, ADH and MDH. For seeds stored at 15 ° C, there were no physiological changes. The lettuce cultivars, especially Everglades, have different levels of tolerance to storage and isoenzyme expressions.
Appears in Collections:DAG - Artigos publicados em periódicos

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