Caracterização morfométrica e fisiológica de sementes de feijão-fava no município de Uruçuí-PI

Abstract

Fava bean (Phaseolus lunatus L.) has great social and economic importance for several rural communities in the Northeast, where it has a considerable variety of cultivars. In this sense, the study aimed at the morphometric characterization and regulation of lima bean seeds cultivated in the municipality of Uruçuí-PI. The experiment was controlled at the Laboratory of the Federal Institute of Piauí, Campus Uruçuí, under a completely randomized design, with four replications of 25 seeds and treatments represented by eleven creole cultivars, identified according to the location of cultivation and tegument colors. Initially, the weight of one thousand seeds was determined (water content 13%). Next, the seeds were photographed with a digital camera and the images tracked using the ImageJ® software, to measure the area, gray levels (brightness) and circularity of each seed. Then, measurements of length, width and thickness were performed with the aid of a digital caliper (0.01 mm), as well as obtaining the limits J = length/width and H = thickness/width. For the regulatory characterization, germination tests (%), field emergence (%), emergence speed index (IVE), accelerated acceleration (%), electrical conductivity (μS.cm-1.g-1) were performed. and dry mass of seedlings (g.seedling-1) before and after refrigerated storage for 60 days. There is great variability in color, shape, weight, length, width and thickness of lima bean seeds cultivated in the municipality of Uruçuí; and seed quality of most genotypes is maintained during refrigerated storage