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The aim of this study was to evaluate the effect of high dilutions of Pulsatilla nigricans in dinamisations 6, 12, 18, 24 and 30 CH on the vigour of soybean seeds subjected to accelerated aging. The experiment was conducted according to a randomised design with 6 treatments and 10 replicates. The treatments consisted of dinamisations 6, 12, 18, 24 and 30 CH and a distilled-water control. After the treatments, the seeds were subjected to accelerated aging (48h at 42ºC) in a growth chamber (25 ± 2ºC). The study evaluated the germination, the length of primary roots and shoots, the fresh weight of roots and shoots and the enzymatic activity of peroxidase (POX-EC1.11.1.7). The variables were analysed by ANOVA, and the means were compared using the Scott-Knott test (p = 0.05). The germination and the fresh weight of roots and shoots of the seedlings treated with Pulsatilla nigricans were higher than the water control, except that CH 30 did not significantly increase the fresh weight of shoots. The dinamisations 6, 24 and 30 CH produced a lower primary root length compared with the control. The dinamisations 12, 18 and 30 CH yielded a greater length of shoots. The total length of seedlings was reduced by the high dilutions 6 and 24 CH.  O objetivo do presente trabalho foi de avaliar o efeito de altas diluições de Pulsatilla nigricans nas dinamizações 6, 12, 18, 24 e 30 CH, no vigor de sementes de soja submetidas ao envelhecimento acelerado. O experimento foi conduzido em delineamento inteiramente casualizado com 6 tratamentos e 10 repetições. Os tratamentos foram constituídos das dinamizações 6, 12, 18, 24 e 30 CH e testemunha com água destilada. Após aplicação dos tratamentos, as sementes foram submetidas ao teste de envelhecimento acelerado (48h a 42ºC), em câmara de crescimento (25 ± 2ºC). Avaliou-se a germinação, o comprimento da raiz primária e da parte aérea, massa fresca da raiz e da parte aérea e atividade enzimática da peroxidase (POX- EC1.11 .1.7). As variáveis foram analisadas por ANOVA e as médias comparadas pelo teste Scott-Knott a 5%. A germinação e a massa fresca da raiz e da parte aérea das plântulas tratadas com Pulsatilla nigricans foram superiores ao controle com água, exceto na dinamização 30 CH para massa fresca da parte aérea. As dinamizações 6, 24 e 30 CH tiveram menor comprimento da raiz primaria comparadas ao controle. As dinamizações 12, 18 e 30 CH, apresentaram maior comprimento de parte aérea. O comprimento total de plântulas foi reduzido com as diluições 6 e 24 CH

The effect of high dilutions of Pulsatilla nigricans on the vigour of soybean seeds subjected to accelerated aging