Physiological and sanitary quality of cockscomb seeds stored for different periods

AUTOR(ES)

Menegaes, Janine Farias

FONTE

Ornam. Hortic.

DATA DE PUBLICAÇÃO

29/04/2019

RESUMO

Resumo O objetivo foi avaliar a qualidade fisiológica e sanitária de sementes de celosias armazenadas por diferentes períodos. O experimento foi conduzido em delineamento inteiramente casualizado, com esquema fatorial 2x5 (duas espécies de celosias: Celosia argentea L. e Celosia cristata L.; e cinco lotes de sementes com diferentes períodos de armazenamento: 0, 4, 8, 12 e 16 anos, a partir da data de colheita), com quatro repetições. Depois de colhido cada lote de sementes, em seus respectivos anos, foram armazenados com grau de umidade médio de 11% e germinação média de 98%, em embalagens de papel Kraft na câmera fria (15 °C e 40% UR). Observou-se que o vigor (primeira contagem de germinação) médio das sementes das duas espécies de celosias foi de 88%, e a germinação de plântulas normais média foi de 89 e 96% para as espécies de C. argentea e C. cristata, respectivamente, com tempo médio de germinação de 2,9 dias para todos os períodos de armazenamento. A frequência relativa demonstrou homogeneidade na germinação das duas espécies de celosias mantendo a viabilidade germinativa em todos os períodos de armazenamento. Conclui-se que o potencial fisiológico e a qualidade sanitária das sementes das celosias C. argentea e C. cristata foram preservados por períodos que variaram de zero a dezesseis anos de armazenamento.Abstract The objective was to evaluate the physiological and sanitary quality of cockscomb seeds stored for different periods. The experiment was conducted in a completely randomized design, with a 2x5 factorial scheme (two species of cockscomb: Celosia argentea L. and Celosia cristata L., and five seed lots with different storage periods: 0, 4, 8, 12 and 16 years, from the date of harvest) with four replicates. After harvesting each batch of seeds, in their respective years, they were stored with an average moisture content of 11% and average germination of 98% in cold chamber in packages of Kraft paper (15 °C and 40% RH). It was observed that the average vigor (first count of germination) of the seeds of the two species of cockscomb was 88%, and the average germination of normal seedlings was 89 and 96% for the C. argentea and C. cristata species, respectively, with mean germination of 2.9 days for all storage periods. The relative frequency demonstrated homogeneity in the germination of the two species of cockscomb maintaining germinative viability in all periods of storage. It is concluded that the physiological potential and sanitary quality of the seeds of the C. argentea and C. cristata were preserved for periods ranging from zero to sixteen years of storage.

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