Influência da água catódica no desempenho fisiológico de sementes de soja submetidas ao armazenamento

Abstract

There are several factors linked to production and post-harvest that affect the quality of soybean seeds. Among them, the environmental conditions to which the seeds are exposed during storage, as well as their moisture. With high water content, the respiratory rate of seeds increases, intensifying their deterioration, with the formation of free radicals. Thus, the aim of this study was to evaluate whether the treatment of soybean seeds with cathodic water, followed by dehydration, before storage, contributes to reducing their deterioration, evaluating their physiological performance. The work was carried out at the Laboratório Didáticos de Analises de Sementes of the Federal Technological University of Parana, Campus Dois Vizinhos. Two seed lots of cultivar BMX Zeus IPRO® (55I57 RSF IPRO®), one with initial vigor levels of 88% and the other with 56%. Half of each batch remained untreated (control) and the other half was treated with cathodic water. Then, germination, accelerated aging, germination speed index, germination coefficient and average germination time were performed. After treatment, the seeds were packed in Kraft paper bags, placed in cardboard boxes and stored in uncontrolled environment conditions. At 2, 4 and 6 months of storage, seed samples were taken to perform the same tests described above. Data were prepared using analysis of variance (ANOVA). In general, under the conditions of this work, through the tests carried out in different batches, cathodic water did not show potential use as an exogenous antioxidant in soybean seeds, in order to maintain vigor and viability indices and reduce deterioration during the storage.