Efeitos fisiológicos e bioquímicos de aleloquímicos de lantana camara l. Na germinação de sementes de avena sativa l.

Translated title of the contribution: Physiological and biochemical effects of lantana camara l. Allelochemicals on the seed germination of avena sativa l.1

Diego Medeiros Gindri, Cileide Maria Medeiros Coelho, VIRGILIO GAVICHO UARROTA

Research output: Contribution to journalArticlepeer-review

Abstract

Lantana camara (L.) is considered one of the main weeds of agricultural crops, and allelochemicals produced by this species may be a source for the development of natural herbicides. In this study, phytotoxic effects of L. camara aqueous extracts on seed germination and seedling growth of Avena sativa (L.) were assessed. The experimental design was completely randomized, in a 2 x 5 factorial scheme, with treatments resulting from two assays, testing five concentrations of the extract (0 %, 2.5 %, 5.0 %, 7.5 % and 10 %; vv-1). During the seed germination, physiological (e.g., seed imbibition, germination and vigor) and biochemical (e.g., catalase, ascorbate peroxidase, proline, phenols, malondialdehyde and hydrogen peroxide) proprieties were evaluated. The leaf extracts of L. camara affected the response variables on A. sativa by reducing the germination speed index (phases I and II) and seed viability (phase III of germination), thus causing a solute leakage and increasing the production of reactive oxygen forms and, finally, lipid peroxidation. Extract concentrations above 2.5 % inhibit the growth of epicotyls. Therefore, the studied allelochemicals showed potential to be exploited in the development of natural herbicides.

Translated title of the contributionPhysiological and biochemical effects of lantana camara l. Allelochemicals on the seed germination of avena sativa l.1
Original languagePortuguese
Article numbere62546
Pages (from-to)1-11
Number of pages11
JournalPesquisa Agropecuaria Tropical
Volume50
DOIs
StatePublished - 2020
Externally publishedYes

Keywords

  • Antioxidant system
  • Bioactive compounds
  • Phytotoxicity
  • Seed physiology

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