GERMINATION AND VIGOR OF Apeiba tibourbou SEEDS SUBMITTED TO WATER STRESS AND TO DIFFERENT TEMPERATURES

被引：0
|
作者：
Guedes, Roberta Sales [1 ]
Alves, Edna Ursulino [2 ]
Viana, Jeandson Silva [3 ]
Goncalves, Edilma Pereira [3 ]
de Lima, Cosmo Rufino [2 ]
Nascimento dos Santos, Severino do Ramo [2 ]
机构：
[1] Univ Fed Santa Catarina, Ctr Ciencias Agr, Dept Fitotecnia, BR-88034001 Florianopolis, SC, Brazil
[2] Univ Fed Paraiba, Ctr Ciencias Agr, Dept Fitotecnia, BR-58397000 Areia, PB, Brazil
[3] Univ Fed Rural Pernambuco, Unidade Acad Garanhuns, BR-55292270 Garanhuns, PE, Brazil
来源：
CIENCIA FLORESTAL | 2013年 / 23卷 / 01期
关键词：
'Jangadeira'; forests seeds; osmotic potential; polyethyleneglycol;
D O I：
暂无
中图分类号：
Q94 [植物学];
学科分类号：
071001 ;
摘要：
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 degrees 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.
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页码：45 / 53
页数：9
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