Can pruning enhance the allelopathic effect? A study with Golden-Dewdrop

Letícia Leite Moreira; Joao Vitor Barbosa Calvelli; Antonio Rodrigues da Cunha Neto; Pamela Ingrid Alves; Renan Gomes Bastos; Luciene de Oliveira Ribeiro Trindade; Geraldo Alves da Silva; Sandro Barbosa

doi:10.1590/2447-536X.v30.e242705

Authors

Letícia Leite Moreira Universidade Federal de Alfenas. Instituto de Ciências da Natureza https://orcid.org/0000-0001-5087-7271
Joao Vitor Barbosa Calvelli Universidade Federal de Alfenas. Instituto de Ciências da Natureza https://orcid.org/0000-0001-6075-6158
Antonio Rodrigues da Cunha Neto Universidade Federal de Alfenas. Instituto de Ciências da Natureza https://orcid.org/0000-0001-7107-2755
Pamela Ingrid Alves Universidade Federal de Alfenas. Instituto de Ciências da Natureza https://orcid.org/0000-0001-5276-8044
Renan Gomes Bastos Universidade Federal de Alfenas. Faculdade de Ciências Farmacêuticas https://orcid.org/0000-0002-5642-3390
Luciene de Oliveira Ribeiro Trindade Universidade Federal de Alfenas. Instituto de Ciências da Natureza https://orcid.org/0000-0002-6844-448X
Geraldo Alves da Silva Universidade Federal de Alfenas. Faculdade de Ciências Farmacêuticas https://orcid.org/0000-0003-3594-563X
Sandro Barbosa Universidade Federal de Alfenas. Instituto de Ciências da Natureza https://orcid.org/0000-0001-7321-0007

DOI:

https://doi.org/10.1590/2447-536X.v30.e242705

Keywords:

allelopathy effect index, bioassay, Duranta erecta, Lactuca sativa, ornamental plants

Abstract

Golden-Dewdrop (Duranta erecta L.), known for its landscaping applications, undergoes successive pruning to maintain its ornamental structure, a practice known to induce numerous physiological and chemical responses in the plant. Therefore, this study aimed to evaluate the influence of pruning and different extraction methods on the allelopathic potential of Golden-Dewdrop on the germination and initial growth of lettuce. Leaf extracts were obtained by decoction (hot) and maceration (cold) at concentrations of 20%, 40%, 60%, 80%, and 100%, with distilled water as a negative control. Phytochemical screening of the extracts was performed for phenolic compounds, flavonoids, anthocyanidins, tannins, cardioactive heterosides, saponins, alkaloids, and terpenes. For the bioassay, germinative and morphological parameters were measured and characterized. The data were subjected to analysis of variance (ANOVA), and for quantitative data, regression models were adjusted, while for qualitative data, means were compared using the Scott-Knott test with 5% significance. Significant differences were observed between extraction methods and management practices, with the hot aqueous extract from pruned plants significantly reducing germination at higher concentrations. The initial growth of lettuce was severely affected, presenting numerous morphological abnormalities, with severe damage to the root system at all concentrations. This study suggests that pruning practices have a modulating effect on the allelopathic activity of Golden-Dewdrop, providing valuable information for landscaping projects and botanical studies considering its evaluation and production of phytotoxic phytochemicals.

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References

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Can pruning enhance the allelopathic effect? A study with Golden-Dewdrop

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