Qualidade física e fisiológica de sementes de brócolos biológicos e convencionais

the objective this work was evaluate the physical and physiological quality in organic and conventional seed of broccoli. four lots of broccoli seeds (brassica oleracea l. var. italica plenk), cv. ramoso piracicaba were used. two of organic origin (lot 1 and lot 2) and two conventional origin (lot 3 and lot 4). the lots were evaluated by the following tests: physical purity, weight of a thousand seeds, water content, standard germination and vigor (first germination count, emergence, emergence speed index in greenhouse and accelerated aging (41, 43 and 45 °c, during 24, 48, 72 and 96 hours). according to the results organic and conventional seed presented similar quality in relation to seed germination. however higher vigor was observed in conventional seed lot. the accelerated aging with temperature of 41 oc for 48 hours and 72 hours for organic and conventional seeds respectively can be used to evaluate the seed quality. the temperature of 43 oc for 48 hours is efficient to evaluate the organic end conventional seeds lots.