QUALIDADE FISIOLÓGICA E CARACTERIZAÇÃO ANATÔMICA DE SEMENTES DE Glycine max L. Merril DURANTE O ARMAZENAMENTO

Abstract

During the storage period it is important to maintain the seeds physiological quality. Storage conditions, such as temperature and relative humidity, influence seed longevity and the reduction of these parameters can significantly increase seed life. Thus, the objective was to evaluate the physiological quality and anatomical characteristics of se two soybean cultivars seeds during refrigerated and non-refrigerated storage. Seeds from two soybean cultivars, BRS 6970 IPRO and NS 7007 IPRO, were used for cultivation in the Midwest region, which were stored for 180 days in conditions of refrigerated and non-refrigerated environment. Every 60 days of storage, the seeds physiological quality assessments were carried out, through germination and vigor tests, and anatomical and histochemical characterization. Each cultivar responded differently to the tests performed, however it was possible to observe that storage in a refrigerated environment was more efficient in maintaining the seeds physiological quality over the months when compared to the non-refrigerated one. The non-refrigerated environment at 180 days was the most critical period of storage, when there was the highest reductions of physiological quality and more intense cellular breakdown in the soybean seeds cotyledon.