Accelerated aging of melon seeds

Abstract

Accelerated aging is one of the most useful tests used for the evaluation of seed vigor but it is seldomly used to test melon (Cucumis melo L.) seeds. The objective this research was to compare different procedures of the accelerated aging test to evaluate the physiological quality of melon seeds and the efficiency of using saturated salt solution for the control of water uptake by seeds. Five seed lots each of the hybrids AF-646 and AF-682 were tested for germination, seedling emergence, traditional accelerated aging (periods 0f 48, 72 and 96 hours, at 38 or 41°C) and salt saturated accelerated aging. The accelerated aging test (traditional procedure and with salt solution) for 72h and 96h, at 38 or 41°C was sensitive to detect differences in the physiological quality of the seeds. It was also observed that the seed water content after salt saturated accelerated aging was lower and more uniform, thus presenting advantagens in relation to the traditional procedure.

Assessment of squash seed vigor using computerized image analysis

“…The efficacy of the procedure using a saturated NaCl solution for evaluation of vegetable seed vigor has been emphasized by several authors, including Rodo et al (2000) in carrot seeds, Torres and Marcos-Filho (2003) in melon, Abdo et al (2005) in cucumber, Bhéring et al (2006) in hot pepper, Dutra and Vieira (2006) in squash, Hyatt and TeKrony (2008) in onion, and Kikuti and Marcos-Filho (2012) in lettuce. The SSAA has advantages in regard to simplicity, similarity in regard to levels of deterioration (closer water contents) observed during seed storage on a commercial scale, and lower additional effect of microorganisms, minimizing the effects of pathogens on the results of the test (Jianhua and McDonald, 1996;Marcos-Filho, 2015).…”

“…Seeking to minimize this problem, Jianhua and McDonald (1996) proposed substituting water for a saturated salt solution; that way, seed water uptake process is retarded, which also inhibits microorganism development. Several studies have confirmed the viability of this procedure, including Rodo et al (2000) in carrot seeds, Torres and Marcos-Filho (2003) in melon, Ávila et al (2006) in radish, Dutra and Vieira (2006) in squash, Kikuti and Marcos-Filho (2007) in cauliflower, Hyatt and TeKrony (2008) in onion and tomato, Lima and MarcosFilho (2009) in cucumber, and Lopes et al (2013) in eggplant.…”

Testes de estresse térmico em sementes de melão

“…Também com sementes de melão, Torres & Marcos Filho (2003) verificaram que o teste de envelhecimento acelerado tradicional e com solução salina 41ºC/72 horas, foi sensível para avaliação do seu potencial fisiológico; referida por outro lado, com sementes de melancia Tabela 2. Valores médios obtidos nos testes de deterioração controlada em lotes de sementes de melão, híbridos Imperial e Gaúcho, em três experimentos Bhering et al (2000), com sementes de pepino; com essa mesma espécie Lima & Marcos Filho (2011) constataram melhores resultados quando este teste foi conduzido a 41 °C por 96 horas de exposição.…”

“…Este teste vem sendo estudado na determinação do vigor de sementes de diversas cucurbitáceas, a exemplo das de maxixe (Torres & Marcos Filho, 2001), melancia (Bhering et al, 2003), melão (Torres & Marcos Filho, 2003;, pepino (Demir et al, 2004;Torres, 2005b) e abobrinha (Dutra & Vieira, 2006). Diante do exposto o objetivo na pesquisa foi estudar metodologias dos testes de deterioração controlada e envelhecimento acelerado tradicional e com solução de cloreto de sódio, na avaliação do potencial fisiológico de sementes de melão.…”

The germination percentage of eggplant seeds based on pretreatments effects

“…Opadajući trend je ukazao na ubrzano starenje semena kod genotipova koji su prošli dormantni period. Ovi rezultati su u saglasnosti sa rezultatima Torres and Negreiros (2008) pogotovo posle temperaturnih tretmana semena plavog patlidžana. Fiziološki asekt sazrevanja semena i predtretmani koji treba da ubrzaju periode inhibicije semena, mogu da izazovu određen broj degenerativnih promena koje dovode do smanjenja klijavosti (Alves et al 2012).…”