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On-line version ISSN 1806-9088
ROSSETO, Jociane; ALBUQUERQUE, Maria Cristina de Figueiredo e; RONDON NETO, Rubens Marques and SILVA, Ivan Cleiton de Oliveira. Germination of Parkia pendula (Willd.) Benth. ex Walp. (fabaceae) seeds in different temperatures. Rev. Árvore [online]. 2009, vol.33, n.1, pp. 47-55. ISSN 1806-9088. http://dx.doi.org/10.1590/S0100-67622009000100006.
The Parkia pendula (Willd.) Benth. ex Walp. is a forest species of the Brazilian Amazon, belonging to the Fabaceae family, of regional importance. However, little is known about its species, despite its common commercial use. The objective of this work was to evaluate the germination of seeds in different temperatures. Temperatures of 15, 20, 25, 30, 35 and 40 ºC were utilized. The six treatments were completely randomized, with four repetitions of 25 seeds kept in paper towel to germinate and kept in transparent plastic bags in a germination chamber with photoperiod of eight hours. The method used was completely randomized with six treatments and four repetitions. Germination was evaluated during seven days, being considered germinated the seeds that had emitted normal, larger than 5mm roots and that, at the same time, led to seedling formation. The following characteristics were analyzed: germination (%), average time for germination and normal formation of seedlings, seedling height and seedling dry matter. It was verified that the seeds of Parkia pendula can germinate at the temperatures of 15, 20, 25, 30, 35 and 40 ºC; however, temperatures of 15, 20 and 40 ºC reduced the number of seedlings. At 30 ºC, germination and number of seedlings of this species were maximized.
Keywords : Forest seeds; seed analysis; viability.