Avaliação da qualidade fisiológica de sementes de feijão-caupi pelo teste de condutividade elétrica

Abstract

Evaluation of cowpea seed quality by electrical conductivityThe electrical conductivity of the seed soaking solution is a procedure recommended for the evaluation of vigor in pea and soybean seeds. However, it was not so well established in other species. The objective of this work was to evaluate their effects on physiological quality of cowpea seeds. Four batches of cowpea seeds were tested for germination, first count of germination, germination percentage, emergence percentage, rate of emergence, radicle and variations in electrical conductivity (temperature 25 °C; volumes of 75 mL and 100 mL of water, 25 and 50 seeds, and 2, 4, 8, 12 and 24 hours periods). The experimental design was a completely randomized with four replicates for each treatment. Based on these results, it was found that the electrical conductivity test was efficient in the separation of seed lots according to their vigor levels.

Physiological quality of upright and prostrate growth cowpea seeds produced in Roraima state, Brazil

“…On the other hand, lineage These results corroborate those obtained by Batista et al (2012), who were successful in differentiating the physiological potential of cowpea seeds through the electrical conductivity test.…”

“…Barbosa et al (2010), analyzing soybean seeds, cultivar BRS highest germination (Table 1) with high electrical conductivity values (Table 2). According to Batista et al (2012), these higher values of solute leakage result in lower rates of root growth, and this is a good parameter for evaluating the quality of cowpea seeds.…”

“…This lower value was not noted with respect to the other variables. Batista et al (2012), studying the physiological quality of cowpea seeds, cultivar BRS Guariba, obtained germination rate between 97 and 100%.…”

Germinação E Vigor De Sementes Crioulas De Feijão-Caupi

“…Devido a isso, apenas com o uso do teste de germinação não é possível distinguir lotes de sementes ou genótipos que possuem porcentagem de germinação similar, porém podem divergir quanto ao vigor. Por exemplo, Batista et al (2012) não conseguiram identificar diferenças significativas entre genótipos avaliados quanto à porcentagem de germinação de quatro lotes de sementes da cultivar BRS Guariba.…”

“…Semelhantemente, Rodrigues et al (2015) encontraram valores próximos para porcentagem de germinação das cultivares BRS Guariba, BRS Maratoã e BRS Pujante, porém somente através do teste de condutividade elétrica e índice de velocidade de emergência de plântulas foi possível indicar a cultivar "Pujante" como a de melhor potencial fisiológico. Conclusão semelhante é concebida por Batista et al (2012) que ao avaliarem quatro lotes de sementes da cultivar BRS Guariba concluíram que o teste de condutividade elétrica é eficaz para selecionar lotes de sementes de feijão-caupi com base no potencial fisiológico.…”