SciELO - Scientific Electronic Library Online

 
vol.24 número1Espécies de Parmotrema (Parmeliaceae, Ascomycota) do litoral centro-sul do Estado de São Paulo: II. Grupos químicos norstíctico e salazínicoDiversidade de Leguminosae em uma área de savana do estado de Roraima, Brasil índice de autoresíndice de assuntospesquisa de artigos
Home Pagelista alfabética de periódicos  

Serviços Personalizados

Journal

Artigo

Indicadores

Links relacionados

Compartilhar


Acta Botanica Brasilica

versão impressa ISSN 0102-3306

Resumo

SOUZA, Flaviana Maluf; GANDOLFI, Sergius; PEREZ, Sonia Cristina Juliano Gualtieri de Andrade  e  RODRIGUES, Ricardo Ribeiro. Allelopathic potential of bark and leaves of Esenbeckia leiocarpa Engl. (Rutaceae). Acta Bot. Bras. [online]. 2010, vol.24, n.1, pp.169-174. ISSN 0102-3306.  http://dx.doi.org/10.1590/S0102-33062010000100016.

We investigated the inhibitory potential of aqueous extracts of bark and leaves of Esenbeckia leiocarpa Engl. on lettuce germination and early seedling growth. We compared the effects of four concentrations (100, 75, 50 and 25%) of each extract to water and polyethylene glycol (PEG 6000) solution controls for four replicates of 50 seeds for germination and four replicates of ten seedlings for seedling growth. The inhibitory effects of E. leiocarpa extracts on the percentage of germination and on the germination speed seemed to be more than simply an osmotic effect, except for the percentage of seeds germinated in bark extracts. When compared to water control, both bark and leaf extracts delayed germination, and leaf extracts also affected the percentage of germinated seeds. Leaf extracts of all concentrations strongly inhibited the development of seedlings and caused them some degree of abnormality; bark extracts also caused abnormalities and reduced seedling growth. Root development was more sensitive to the extracts than hypocotyl growth. The negative effects of leaf extracts on germination and seedling growth were more pronounced than those of bark extracts, and the overall effects of both extracts were positively correlated with extract concentrations.

Palavras-chave : allelopathy; germination; growth; inhibition; plant-plant interaction.

        · resumo em Português     · texto em Inglês     · Inglês ( pdf epdf )

 

Creative Commons License Todo o conteúdo deste periódico, exceto onde está identificado, está licenciado sob uma Licença Creative Commons