Affiliation:
1. Companhia Integrada de Desenvolvimento Agrícola de Santa Catarina, Brasil
2. Universidade do Estado de Santa Catarina, Brasil
3. Pontificia Universidad Católica de Valparaiso, Chile
Abstract
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.
Subject
Agronomy and Crop Science
Reference48 articles.
1. The inhibitory effects of coumarin on the germination of durum wheat (Triticum turgidum ssp. durum, cv. Simeto) seeds;ABENAVOLI M. R.;Journal of Chemical Ecology,2006
2. Allelopathic effects of spurge (Euphorbia hierosolymitana) on wheat (Triticum durum);ABU-ROMMAN S.;American Eurasian Journal of Agricultural & Environmental Sciences,2010
3. The effect of drought and ultraviolet radiation on growth and stress markers in pea and wheat;ALEXIEVA V.;Plant Cell Environment,2001
4. Respostas fisiológicas de sementes e plântulas de alface submetidas ao extrato de Philodendron bipinnatifidum;AUMONDE T.;Semina: Ciências Agrárias,2013
5. Response of antioxidant enzymes to transfer from elevated carbon dioxide to air and ozone fumigation, in the leaves and roots of wild-type and a catalase-deficient mutant of barley;AZEVEDO R. A.;Physiologia Plantarum,1998
Cited by
7 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献