Methods for overcoming dormancy of Parkinsonia aculeata L. seeds
The Parkinsonia aculeata L seeds have tegumentary dormancy, which makes them last for a long period in the seed bank of the earth so that their germination occurs in favorable conditions. Our aim was to evaluate the influence of pregermination treatments for overcoming the dormancy of P. aculeata se...
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| Format: | Article |
| Language: | English |
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Universidade Estadual de Londrina
2015-06-01
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| Series: | Semina: Ciências Agrárias |
| Subjects: | |
| Online Access: | http://www.uel.br/revistas/uel/index.php/semagrarias/editor/submission/12408 |
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| author | Pollyanna Freire Montenegro Agra Roberta Sales Guedes Maria Lúcia Maurício da Silva Vênia Camelo de Souza Leonaldo Alves de Andrade Edna Ursulino Alves |
| author_facet | Pollyanna Freire Montenegro Agra Roberta Sales Guedes Maria Lúcia Maurício da Silva Vênia Camelo de Souza Leonaldo Alves de Andrade Edna Ursulino Alves |
| author_sort | Pollyanna Freire Montenegro Agra |
| collection | DOAJ |
| description | The Parkinsonia aculeata L seeds have tegumentary dormancy, which makes them last for a long period in the seed bank of the earth so that their germination occurs in favorable conditions. Our aim was to evaluate the influence of pregermination treatments for overcoming the dormancy of P. aculeata seeds. The seeds were submitted to the following treatments: sample – intact seeds (T1); mechanical scarification with water sandpaper no. 80, followed by room temperature water soaking for 12 and 24 hours (T3 e T4, respectively); immersion in sulfuric acid for 5, 10, 15 and 20 minutes (T5, T6, T7 e T8, respectively); immersion in water in 60ºC, 70ºC, 80ºC and 90ºC for one minute (T9, T10, T11 e T12, respectively). The characteristics evaluated were: percentage of emergence, emergence first count, emergence speed index, height and dry weight of seedlings. In the treatments that involved immersion in water in 60ºC, 70ºC, 80ºC and 90ºC, a low percentage of emergence was obtained. The P. aculeate seeds tegumentary dormancy is overcome with maximum efficiency by the mechanical scarification with sandpaper, suggesting that, in natural environment the movement of contraction and expansion of the soil results in a mechanical scarification of the tegument of the seeds, thus, allowing a high percentage of germination with distribution as time passes. |
| first_indexed | 2024-12-22T10:39:08Z |
| format | Article |
| id | doaj.art-90f3f0d39de64c089efc66dedbf4d406 |
| institution | Directory Open Access Journal |
| issn | 1676-546X 1679-0359 |
| language | English |
| last_indexed | 2024-12-22T10:39:08Z |
| publishDate | 2015-06-01 |
| publisher | Universidade Estadual de Londrina |
| record_format | Article |
| series | Semina: Ciências Agrárias |
| spelling | doaj.art-90f3f0d39de64c089efc66dedbf4d4062022-12-21T18:29:04ZengUniversidade Estadual de LondrinaSemina: Ciências Agrárias1676-546X1679-03592015-06-013631191120210.5433/1679-0359.2015v36n3p1191Methods for overcoming dormancy of Parkinsonia aculeata L. seedsPollyanna Freire Montenegro Agra 0Roberta Sales Guedes 1Maria Lúcia Maurício da Silva 2Vênia Camelo de Souza 3Leonaldo Alves de Andrade 4Edna Ursulino Alves5Universidade Federal Rural do Semi-ÁridoUniversidade Federal de Santa CatarinaUniversidade Federal da ParaíbaUniversidade Federal da ParaíbaUniversidade Federal da ParaíbaUniversidade Federal da ParaíbaThe Parkinsonia aculeata L seeds have tegumentary dormancy, which makes them last for a long period in the seed bank of the earth so that their germination occurs in favorable conditions. Our aim was to evaluate the influence of pregermination treatments for overcoming the dormancy of P. aculeata seeds. The seeds were submitted to the following treatments: sample – intact seeds (T1); mechanical scarification with water sandpaper no. 80, followed by room temperature water soaking for 12 and 24 hours (T3 e T4, respectively); immersion in sulfuric acid for 5, 10, 15 and 20 minutes (T5, T6, T7 e T8, respectively); immersion in water in 60ºC, 70ºC, 80ºC and 90ºC for one minute (T9, T10, T11 e T12, respectively). The characteristics evaluated were: percentage of emergence, emergence first count, emergence speed index, height and dry weight of seedlings. In the treatments that involved immersion in water in 60ºC, 70ºC, 80ºC and 90ºC, a low percentage of emergence was obtained. The P. aculeate seeds tegumentary dormancy is overcome with maximum efficiency by the mechanical scarification with sandpaper, suggesting that, in natural environment the movement of contraction and expansion of the soil results in a mechanical scarification of the tegument of the seeds, thus, allowing a high percentage of germination with distribution as time passes.http://www.uel.br/revistas/uel/index.php/semagrarias/editor/submission/12408Biological invasion; Germination; Pregermination treatments |
| spellingShingle | Pollyanna Freire Montenegro Agra Roberta Sales Guedes Maria Lúcia Maurício da Silva Vênia Camelo de Souza Leonaldo Alves de Andrade Edna Ursulino Alves Methods for overcoming dormancy of Parkinsonia aculeata L. seeds Semina: Ciências Agrárias Biological invasion; Germination; Pregermination treatments |
| title | Methods for overcoming dormancy of Parkinsonia aculeata L. seeds |
| title_full | Methods for overcoming dormancy of Parkinsonia aculeata L. seeds |
| title_fullStr | Methods for overcoming dormancy of Parkinsonia aculeata L. seeds |
| title_full_unstemmed | Methods for overcoming dormancy of Parkinsonia aculeata L. seeds |
| title_short | Methods for overcoming dormancy of Parkinsonia aculeata L. seeds |
| title_sort | methods for overcoming dormancy of parkinsonia aculeata l seeds |
| topic | Biological invasion; Germination; Pregermination treatments |
| url | http://www.uel.br/revistas/uel/index.php/semagrarias/editor/submission/12408 |
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