Herbicide activity of natural compounds from Baccharis spp Herbicidal activity of natural compounds from Baccharis spp. on the germination and seedlings growth of Lactuca sativa and Bidens pilosa

Abstract

CITATIONS 0 READS 401 3 authors: Some of the authors of this publication are also working on these related projects: Effect of PGPG on alleviating salinity stress in maize View project Characterization of Streptomyces spp. isolates from Fabaceae rhizosphere as Plant Growth Promoting Rhizobacteria in soybean [Glycine max (L.) Merrill] View project ABSTRACTWe evaluated the effects of aqueous and ethanolic extracts from 3-Baccharis species (B. dentata, B. uncinella and B. anomala) on the germination and seedlings growth of Lactuca sativa (model species) and Bidens pilosa (weed), and by chemical analysis, the phenolic compounds were determined in extracts. Aqueous and ethanolic extracts of B. dentata, B. uncinella and B. anomala were tested at 2.5, 5, 7.5 and 10% concentrations. Allelopathic effects of three Baccharis species were variable. The B. pilosa was more sensitive to the extracts than L. sativa and germination was inhibited with ethanolic extracts of B. anomala and B. uncinella from 5 to 10%. Aqueous extract of B. dentata and B. uncinella at 10% concentration reduced the germination of B. pilosa by 80%. The ethanolic extracts of B. uncinella (2.5 to 10%) and B. anomala (5 to 10%) caused 100% mortality of seedlings. Total phenolic compounds were more abundant in aqueous extracts. Amongst the phenolics, catechin was most abundant (1.61 to 6.16 mg g -1 DM) in aqueous and ethanolic extracts of Baccharis species tested. This study showed that Baccharis uncinella may be used as an alternative bioherbicide to control the weeds in agroecosystems.

Allelochemical Activity of Eugenol-Derived Coumarins on Lactuca sativa L.

“…Coumarins are a large group of secondary metabolites derived from phenolic compounds, are produced mainly by higher plants, and may also occur in some fungi and bacteria [4]. There are reports about the bioactivity of coumarins that indicate these substances are a potential alternative to commercial herbicides, which is based on inhibiting germination and initial growth and development, as well as blocking mitosis in innumerable biotests [5][6][7].…”

Encapsulated Microparticles of (1→6)-β-d-Glucan Containing Extract of Baccharis dracunculifolia: Production and Characterization

“…These compounds were also identified in the work of Rezende et al [63] and Sousa et al [64] in B. dracunculifolia extract. Catechin (6.06 mg/L) is commonly found in species of the genus Baccharis ; e.g., B. uncinella , B. dentata , and B. anomala [65]. The presence of these bioactive compounds identified by HPLC analysis indicate the resistance of the microparticles to the temperature conditions employed in the atomization process during spray-drying.…”

The alkaloids of Lupinus mutabilis Sweet. and its use in the weed control

“…Corsato et al (2008) observed that the extract of Lupinus albus affected the germination of B. pilosa at the lowest concentration (20%), even managing to completely inhibit the germination of the species at concentrations of 80 and 100%, which contrasts with what was obtained in this experiment, probably due to the amount of the concentrations and the species of Lupinus used in their research. Various studies showed that B. pilosa germination rate is strongly affected by other allelopathic substances as essential oils, phenolic, polyphenols and terpenoids (Dias et al, 2017;Barbosa et al, 2018;Ferreira et al, 2020).…”