Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.5/6794
Título: Contribuição para o conhecimento da capacidade e vigor germinativos de sementes de Acacia dealbata Link. e Acacia longifolia (Andr.) Wild.
Autor: Marques, Filipe Alexandre de Andrade
Orientador: Fabião, António Manuel Dorotêa
Afonso, Marta Falcão
Palavras-chave: Acacia longifolia
Acacia dealbata
germination
provenances
seed propagation
chlorophyll fluorescence
Data de Defesa: 2014
Editora: ISA
Citação: Marques, F.A.A. - Contribuição para o conhecimento da capacidade e vigor germinativos de sementes de Acacia dealbata Link. e Acacia longifolia (Andr.) Wild.. Lisboa: ISA, 2014, 66 p.
Resumo: The aim of this study was to improve the knowledge on seed-coat dormancy and germination skills of Acacia, seeking to clarify key aspects relating to the efficiency of its expansion through seed propagation. The species, Acacia longifolia (provenance: Sintra) and A. dealbata (provenances: Fundão and Cabrum river valley), are considered two of the most invasive of its genus in Portugal. For both species two seed propagation tests were performed: one for pre-germination treatment and another for germination in nursery environment. In these trials, we determined the weight of seeds, the germination rate and the vigor index; hot water (90° C followed by 24 hour immersion) was used to break the seed-coat dormancy. In the experiment performed in the nursery the two species were also compared for the rate of mortality, and for vitality through the determination of chlorophyll fluorescence. The results indicated that Acacia longifolia has a higher fitness than A. dealbata to seed propagation. This capability was confirmed by a potential germination in chamber significantly higher than that of A. dealbata, by a higher germination rate in nursery and higher vitality of seedlings produced, measured by a post-germinative mortality rate significantly lower.
Descrição: Mestrado em Engenharia Florestal e dos Recursos Naturais - Instituto Superior de Agronomia
URI: http://hdl.handle.net/10400.5/6794
Aparece nas colecções:BISA - Dissertações de Mestrado / Master Thesis

Ficheiros deste registo:
Ficheiro Descrição TamanhoFormato 
Dissertacao_Filipe_02_Rev_AF_final.pdf2,44 MBAdobe PDFVer/Abrir


FacebookTwitterDeliciousLinkedInDiggGoogle BookmarksMySpace
Formato BibTex MendeleyEndnote Degois 

Todos os registos no repositório estão protegidos por leis de copyright, com todos os direitos reservados.