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(Reference retrieved automatically from SciELO through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Allelopathic potential of bark and leaves of Esenbeckia leiocarpa Engl. (Rutaceae)

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Author(s):
Flaviana Maluf Souza [1] ; Sergius Gandolfi [2] ; Sonia Cristina Juliano Gualtieri de Andrade Perez [3] ; Ricardo Ribeiro Rodrigues [4]
Total Authors: 4
Affiliation:
[1] Universidade Estadual de Campinas. Instituto de Biologia. Departamento de Botânica - Brasil
[2] Universidade de São Paulo. Escola Superior de Agricultura Luiz de Queiroz. Departamento de Ciências Biológicas - Brasil
[3] Universidade Federal de São Carlos. Departamento de Botânica - Brasil
[4] Universidade de São Paulo. Escola Superior de Agricultura Luiz de Queiroz. Departamento de Ciências Biológicas - Brasil
Total Affiliations: 4
Document type: Journal article
Source: Acta Botanica Brasilica; v. 24, n. 1, p. 169-174, 2010-03-00.
Abstract

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. (AU)

FAPESP's process: 99/09635-0 - Diversity, dynamics and conservation in São Paulo State Forests: 40ha of permanent parcels
Grantee:Ricardo Ribeiro Rodrigues
Support Opportunities: BIOTA-FAPESP Program - Thematic Grants