Controlled deterioration to evaluate okra seed vigor

Abstract

Germination and vigor tests are essential components of seed quality control programs adopted by seed industries. We studied different procedures to perform the controlled deterioration test to identify differences in vigor among okra seed lots. Four seed lots of Colhe Bem cultivar and five seed lots of Santa Cruz 47 cultivar were submitted to the following tests: germination, seedling emergence, controlled deterioration (seeds with moisture contents of 18, 21 and 24% at 45°C for 24 and 48 hours) and moisture content. The controlled deterioration test is efficient to evaluate the physiological potential of okra seeds, and the combination of 24% water, 45°C during 24 hours is recommended.

Controlled deterioration test for evaluation of sunn hemp seed vigor

“…The 24% seed moisture content was also the most suitable for controlled deterioration test in cotton (Dutra and Medeiros-Filho, 2008), scarlet eggplant , and okra (Torres et al, 2013). On the other hand, the 20% seed moisture content was suitable for bean (Santos et al, 2003), melon (Mavi and Demir, 2007), and cauliflower (Kikuti and Marcos-Filho, 2008), whereas in peanut seeds, 15% moisture content was the most appropriate treatment (Rossetto et al, 2004).…”

“…Similarly, in okra seeds, the controlled deterioration test also showed no sufficient sensitivity to evaluate the seed physiological potential with 18% seed moisture content (Torres et al, 2013).…”

“…The controlled deterioration test is recommended for brassica seeds (ISTA, 2014), and widely used for various seed crops, including bean (Santos et al, 2003), peanut (Rossetto et al, 2004), melon (Mavi and Demir, 2007), cotton (Dutra and Medeiros-Filho, 2008), maize (Zucareli et al, 2011), beet , coriander (Torres et al, 2012), scarlet eggplant , soybean (Cabral et al, 2012), eggplant (Lopes et al, 2013), forage turnip (Morais and Rossetto, 2013) and okra (Torres et al, 2013). However, for sunn hemp seeds, studies about seed vigor using the controlled deterioration test are still limited.…”

Diferenciação de lotes de sementes de quiabo pelo teste de envelhecimento acelerado

“…Até o momento, é verifi cada apenas a efi ciência do teste de deterioração controlada, conduzido a 45ºC, com grau de umidade das sementes de 24% e período de exposição de 24 horas (TORRES et al, 2013); e, para o teste de envelhecimento, o período de 144 horas, a 41ºC, mostrou-se efi ciente na separação dos lotes em diferentes níveis de vigor (TORRES & CARVALHO, 1998). Assim, objetivouse, nesta pesquisa determinar metodologias para a condução do teste de envelhecimento acelerado, visando à identifi cação de diferentes níveis de vigor em lotes de sementes de quiabo.…”

Controlled deterioration test and use of the Seed Vigor Imaging System (SVIS ® ) to evaluate the physiological potential of crambe seeds

“…In this test, the seed moisture content is standardized to pre-established values before the period of exposure to stress. That way, seeds are artificially aged under high temperatures; however, with similar moisture content (AOSA, 2002;Lima and MarcosFilho, 2011;Torres et al, 2013).…”