Use este identificador para citar ou linkar para este item: http://repositorio.ufla.br/jspui/handle/1/41585
Título: Germination temperatures affect the physiological quality of seeds of lettuce cultivars
Título(s) alternativo(s): Qualidade fisiológica de sementes de alface sob diferentes temperaturas na germinação
Palavras-chave: Lactuca sativa L.
Isoenzymes
Thermotolerance
Esterase
Catalase
Alcohol dehydrogenase
Alface - Qualidade
Isoenzimas
Termotolerância
Álcool desidrogenase
Data do documento: 2019
Editor: Universidade Federal de Uberlândia
Citação: ALMEIDA, F. A. de et al. Germination temperatures affect the physiological quality of seeds of lettuce cultivars. Bioscience Journal, Uberlândia, v. 35, n. 4, p. 1143-1152, jul./ago. 2019.
Resumo: The objective of this study was to evaluate the physiological quality allied to biochemical quality of lettuce seeds by germination and enzymes expression at 20, 25, 30, 35, 40 and 42ºC. Germination speed index and percentage of germination were estimated. Isoenzyme expressions were assessed by alcohol dehydrogenase (ADH), malate dehydrogenase (MDH), catalase (CAT), esterase (EST), pyruvate decarboxylase (PDC) and glutamate oxaloacetate transferase (GOT). The experiment consisted of a completely randomized design in a factorial scheme 4x6, with four cultivars and six different temperatures, with four replications. The highest germination and vigor were observed for cv. ‘Everglades’ at 35°C, which proved that this cultivar is thermotolerant. Catalase can be considered a genetic marker for the identification of thermotolerant lettuce cultivars. Cultivar ‘Everglades’ has potential to be used in lettuce breeding programs aimed at cultivars tolerant to high temperatures during germination.
URI: http://repositorio.ufla.br/jspui/handle/1/41585
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