Phytotoxicity Study on Bidens sulphurea Sch. Bip. as a Preliminary Approach for Weed Control

dc.contributor.authorDa Silva, Bruna P. [UNESP]
dc.contributor.authorNepomuceno, Mariluce P. [UNESP]
dc.contributor.authorVarela, Rosa M.
dc.contributor.authorTorres, Ascensión
dc.contributor.authorMolinillo, José M. G.
dc.contributor.authorAlves, Pedro L. C. A. [UNESP]
dc.contributor.authorMacías, Francisco A.
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversity of Cádiz
dc.description.abstractFarmers of the Franca region in Brazil observed that Bidens sulphurea was able to eliminate the Panicum maximum weed, which infected coffee plantations, without affecting the crop. In an effort to determine if the inhibitory effects observed were due to the presence of phytotoxic compounds from leaves and roots, a biodirected isolation and spectroscopic characterization has been carried out. The leaf dichloromethane and root acetone extracts were the most active, and the former appeared to be more phytotoxic to the target species, including four weeds. A total of 26 compounds were isolated from leaves and roots, and four of them are described here for the first time. The major compounds in the leaf extract are the sesquiterpene lactones costunolide, reynosin, and santamarine, and these showed marked inhibition. Amaranthus viridis and Panicum maximum were the most sensitive species of the weeds tested. These three phytotoxic lactones were also evaluated on A. viridis and P. maximum under hydroponic conditions. A. viridis was the most affected species with the three lactones, and santamarine was the most phytotoxic compound on both. This is the first time that the phytotoxicity of sesquiterpene lactones has been evaluated on hydroponic culture. The work described here is a preliminary approach for the use of B. sulphurea for weed control in agriculture, both as a cover crop and by use of its components as natural herbicide leads.en
dc.description.affiliationDepartment of Applied Biology to Agropecuary São Paulo State University UNESP
dc.description.affiliationAllelopathy Group Department of Organic Chemistry Institute of Biomolecules (INBIO) Campus de Excelencia Internacional Agroalimentario (ceiA3) University of Cádiz, C/Avda. República Saharaui, 7
dc.description.affiliationUnespDepartment of Applied Biology to Agropecuary São Paulo State University UNESP
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.identifier.citationJournal of Agricultural and Food Chemistry, v. 65, n. 25, p. 5161-5172, 2017.
dc.relation.ispartofJournal of Agricultural and Food Chemistry
dc.rights.accessRightsAcesso restrito
dc.subjectBidens sulphurea
dc.subjecthydroponic culture
dc.titlePhytotoxicity Study on Bidens sulphurea Sch. Bip. as a Preliminary Approach for Weed Controlen