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Descripción
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| Thymus lotocephalus G. López & R. Morales (Lamiaceae) is a rare species endemic from the Algarve region, Portugal, and little information is known about this plant. The species is legally protected under the European Habitats Directive 92/43/CEE and by the Portuguese law (reference 140/99 from April 24). Biotechnological approaches offer several conservation possibilities which have the potential to support in situ protection strategies and provide complementary conservation options. However, before the application of ex situ conservation approaches (e.g. cryopreservation, ex situ plant propagation and populations restoration) it is important to study the seed germination requirements of the species. Thus, the goal of this work was to investigate the germination requirements of T. lotocephalus seeds under controlled conditions. The presowing treatments studied were: dry heat, cold, mechanical scarification, acid scarification, soaking in distilled water and soaking in gibberellic acid. Untreated (control) and pre-treated seeds were incubated under a 16-h light photoperiod at 25 ¿ 2 ºC. It was observed that untreated seeds presented a final germination percentage around 50% and dormancy of T. lotocephalus seeds was not broken by heat. From the treatments tested, only soaking in gibberellic acid significantly improved germination, with a germination percentage higher than the control (more than 80%). From these preliminary results, it can be concluded that the main cause of seed dormancy present in T. lotocephalus seems to be physiological and can be overcome by immersing the seeds in gibberellic acid. | |
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Internacional
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Si |
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Nombre congreso
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XVII Congress of the Federation of European Societies of Plant Biology |
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Tipo de participación
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960 |
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Lugar del congreso
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Valencia, España |
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Revisores
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Si |
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ISBN o ISSN
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DOI
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Fecha inicio congreso
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04/07/2010 |
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Fecha fin congreso
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09/07/2010 |
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Desde la página
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102 |
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Hasta la página
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102 |
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Título de las actas
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Seed germination of the endangered species Thymus lotocephalus G. López & R. Morales (Lamiaceae). |