GERMINAÇÃO E VIGOR DE SEMENTES DE Apeiba tibourbou SUBMETIDAS AO ESTRESSE HÍDRICO E DIFERIENTES TEMPERATURAS.

Guedes, Roberta Sales; Alves, Edna Ursulino; Viana, Jeandson Silva; Gonçalves, Edilma Pereira; De Lima, Cosmo Rufino; Nascimento dos Santos, Severino do Ramo

The Apeiba tibourbou is a forest species belonging to the family Tiliaceae, popularly known as 'pau-de-jangada', which is widely used as ornamental, in medicine and your timber used in the manufacture of small boats. Seeds of this species were submitted to different osmotic potentials induced by polyethyleneglycol (PEG-6000) in order to verify their resistance to drought conditions. Seeds were previously scarified with sandpaper for 5 minutes and incubated at 25 and 30 °C, at osmotic potentials of 0.0; -0.2; -0.4; -0.6; -0.8 and -1.0 MPa. The following parameters were analyzed: germination percentage, index germination speed, first count germination, length and dry matter of seedlings. A significant reduction in germination velocity and final percentage of germination from -0.2 MPa in relation to control was observed. It was found that water stress resistance limits ranged from -0.4 to -0.6 MPa.

GERMINATION; TILIACEAE; ORNAMENTAL plants; SEED viability; MEDICINAL plants; POLYETHYLENE glycol

Ciência Florestal (01039954), 2013, Vol 23, Issue 1, p45

0103-9954

Academic Journal

10.5902/198050988438