Effect of storage in overcoming seed dormancy ofAnnona coriacea Mart. seeds

Anais da Academia Brasileira de Ciências

Daiane M. Dresch¹  Silvana P.q. Scalon¹  Tathiana E. Masetto¹ 

关键词: Annonaceae;    gibberellins;    Brazilian Savanna;    temperatures;    Annonaceae;    giberelina;    Cerrado;    temperaturas;   

DOI  :  10.1590/0001-3765201420130276

来源: SciELO

【 摘 要 】

The aim of this study was to evaluate the effect of pre-treatments on overcoming dormancy of A. coriacea seeds. Seeds were processed and stored in polyethylene bags at temperatures of at -18°C (42% RH), 5°C (34% RH), 15°C (60% RH) and 25°C (34% RH), during 0, 30, 60, 90, 120 and 150 days. After storage, seeds were immersed in 350 mg.L−1 gibberellic acid for 144 hours. Sowing was carried out in plastic bags containing Red Latosol + Bioplant®. Moisture content, emergence percentage, emergence speed index, length and dry mass of seedlings, were evaluated. The experimental design was completely randomized in a factorial with four replications of 50 seeds each. The seed storage at 5°C and subsequent immersion in gibberellic acid was efficient to reach high percentage, emergence speed and plant growth. A. coriacea seeds showed non-deep simple morphophysiological dormancy wherein the physiological component can be overcome after the seeds are storage at 5°C for a maximum period of 53 days and subsequent immersed in exogenous GA (350 mg.L−1 for 144 hours).

【 授权许可】

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