Qualea grandiflora Mart.: TEMPERATURA NA GERMINABILIDADE DE SEMENTES.

Bilio, Reinaldo Souza; Guimarães, Sebastião Carneiro; Caldeira, Sidney Fernando

Qualea grandiflora Mart, occurs in riverine forests and in 'cerrado' areas, popularly known as 'pau-terra' With the purpose of obtaining information about the reproductive spread of this species, it was studied the effect of temperature on seed germination capability. The temperatures used were: 15, 20, 25, 30, 35 and 40 °C. The seeds were sown on paper towel in roll form, with four replicates of one experimental unit consisted of a roll with 25 seeds. The experiment followed a completely randomized design with six treatments and four replications. There was primary root emission at temperatures of 15 to 40 °C. Values between 78 % and 93 % were obtained in a wide range of temperatures between 15 and 35 °C. A normal seedling occurred in narrower range, between 20 and 35 °C. The protrusion of the root began on the seventh day after sowing, except the 15 °C which provided a slow and gradual process, beginning on the fourteenth day after hatching. At 40 °C, the germination capability was less than 15 % and there was no normal seedling. For the seed germination of 'pau-terra', it is recommended that the temperature range between 20 and 30 °C.

GERMINATION; EFFECT of temperature on plants; SEEDLINGS; TREE physiology; TREE reproduction; SEED viability

Ciência Florestal (01039954), 2013, Vol 23, Issue 1, p245

0103-9954

Academic Journal

10.5902/198050988458