
handle: 11449/140966
Foram avaliados os efeitos do ácido giberélico na germinação de sementes do porta-enxerto de pessegueiro 'Okinawa'. O experimento foi realizado primeiramente em câmara fria (3º - 4º C), onde as sementes sem endocarpo foram armazenadas por um período de 60 dias. Na segunda etapa, as sementes foram colocadas em germinador, empregando-se papel de filtro dupla face umedecido com água destilada, como meio para a germinação. Os tratamentos foram realizados mediante imersão das sementes, em soluções preparadas com o biorregulador, contendo GA3 10%, num tempo de imersão uniforme de 24 horas. Os tratamentos empregados corresponderam a: 0 (controle); 25; 50; 75 e 100 mg l- 1 de GA3. O delineamento experimental empregado foi em parcelas subdivididas com 9 repetições e 54 sementes por repetição, onde as parcelas corresponderam as doses de GA3 e as subparcelas aos dias de avaliação após a semeadura (22, 24, 26, 28, 30, 32 e 34 dias). Foram avaliados a porcentagem, o tempo e o índice de velocidade média de germinação (IVG). Os resultados obtidos permitiram concluir que as sementes tratadas com GA3 54 mg l-1 apresentaram a maior porcentagem (68,9%) e o menor índice de velocidade média de germinação (0,06 sementes germinadas dia-1), sendo que o tempo médio de germinação foi de 20 dias.
The effects of the growth regulator were evaluated for peach seeds rootstock 'Okinawa' germination. First an experiment was performed in a refrigerator (3-4ºC), with the seeds were put during 60 days. Then, the seeds were put in a germinator, using as a medium for seed germination filter paper wetted with distiled water. Seeds were treated with giberelic acid during 24 hours. The treatments were: 0 (control); 25; 50; 75 and 100 mg per litre of GA3 on the seeds with and without endocarp. The experimental design was in the subdivided parcels with nine replications and 54 seeds per replication, where the parcels was the GA3 concentrations and the subparcels the days of evaluation after the seeded (22, 24, 26, 28, 30, 32 and 34 days). It were evaluated the seeds percentage, time and medium velocity of germination. The results showed that the seeds treated with GA3 54 mg per litre showed the high percentage (68,9%) and the least index germination velocity (0,06 seeds germinated per day), being the medium time germination was the 20 days.
Prunus persica, Propagação, Giberelic acid, Rootstock, Propagation, Ácido giberélico, Prunus pérsica, Porta-enxerto
Prunus persica, Propagação, Giberelic acid, Rootstock, Propagation, Ácido giberélico, Prunus pérsica, Porta-enxerto
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