RT journal article
T1 Characterization of Conyza bonariensis Allelochemicals against Broomrape Weeds
A1 Cala Peralta, Antonio
A1 Soriano, Gabriele
A1 García Zorrilla, Jesús
A1 Masi, Marco
A1 Cimmino, Alessio
A1 Fernández-Aparicio, Mónica
A2 Química Orgánica
K1 Orobanche
K1 Phelipanche
K1 suicidal germination
K1 radicle growth
K1 parasitic plants
K1 sustainable crop protection
AB The study of allelopathic activity of plants and the isolation and characterization of the responsible allelochemicals can lead to the development of environment friendly alternative approaches to weed control. Conyza species are invasive weeds that use allelopathic activity as part of a successful strategy to outcompete neighboring plants. Broomrape weeds are parasitic plants that use host-induced germination and the formation of a haustorium as strategies to infect host plants. The control of broomrape infection in most affected crops is limited or non-existing. In the current study, we investigated the allelopathic activity of Conyza bonariensis organic extracts in suicidal germination and radicle growth of four broomrape species (Orobanche crenata, Orobanche cumana, Orobanche minor and Phelipanche ramosa). A bioactivity-driven fractionation of Conyza bonariensis extracts led to the identification of two germination-inducing molecules and two growth-inhibitory compounds. The germination-inducing metabolites had species-specific activity being hispidulin active on seeds of O. cumana and methyl 4-hydroxybenzoate active in P. ramosa. The growth-inhibitory metabolites (4Z)-lachnophyllum lactone and (4Z,8Z)-matricaria lactone strongly inhibited the radicle growth of all parasitic weed species studied. Some structure-activity relationships were found as result of the study herein presented.
PB MDPI
SN 1420-3049
YR 2022
FD 2022-11
LK http://hdl.handle.net/10498/28798
UL http://hdl.handle.net/10498/28798
LA eng
DS Repositorio Institucional de la Universidad de Cádiz
RD 08-nov-2026