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Effects of light, temperature and mesocarp on germination of juçara-palm (Euterpe edulis) seeds

Studies on the effect of light, temperature and the presence of mesocarp on the germination of Euterpe edulis Mart. (jucara-palm) seeds were carried out. The germination of seeds with and without mesocarp was assessed in the presence of light (12-h photoperiod) or darkness and submitted to temperatures of 25, 28 or 30°C. A complete randomized 2×2×3 (seed types, light conditions and temperatures) factorial scheme was used. The percentage and the germination speed index (GSI) of seeds with and without fruit pulp were evaluated. Seeds of E. edulis were indifferent to the presence of light. The germination percentage of the seeds with mesocarp was lower (6 to 10%) than those without mesocarp (47 to 75%).