(4 Z )-Lachnophyllum Lactone, an Acetylenic Furanone from Conyza bonariensis, Identified for the First Time with Allelopathic Activity against Cuscuta campestris

Mónica Fernández-Aparicio, Gabriele Soriano, Marco Masi, Pilar Carretero, Susana Vilariño-Rodríguez and Alessio Cimmino
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Mónica Fernández-Aparicio: Department of Plant Breeding, Institute for Sustainable Agriculture (IAS), CSIC, Avenida Menéndez Pidal s/n, 14004 Córdoba, Spain
Gabriele Soriano: Department of Chemical Sciences, University of Naples Federico II, Complesso Universitario Monte S. Angelo, Via Cintia, 80126 Naples, Italy
Marco Masi: Department of Chemical Sciences, University of Naples Federico II, Complesso Universitario Monte S. Angelo, Via Cintia, 80126 Naples, Italy
Pilar Carretero: University of Córdoba, Campus de Rabanales, 14071 Córdoba, Spain
Susana Vilariño-Rodríguez: ALGOSUR S.A., Ctra Lebrija-Trebujena km 5.5, 41740 Sevilla, Spain
Alessio Cimmino: Department of Chemical Sciences, University of Naples Federico II, Complesso Universitario Monte S. Angelo, Via Cintia, 80126 Naples, Italy

Agriculture, 2022, vol. 12, issue 6, 1-12

Abstract: Cuscuta species are obligate parasitic plants that infect the stems of a wide range of hosts including many crop and weed species causing severe agricultural problems. Using in vitro experiments to screen organic extracts prepared from fifteen autotrophic weed species found in agricultural fields infested with Cuscuta campestris , we have identified for the first time a strong phytotoxic activity in Conyza bonariensis extract against C. campestris . Additional pot experiments revealed that seven day-old Cuscuta seedlings had reduced capacity to coil and properly attach on Conyza plants, leading to reduced parasitic weed infection. Via activity-guided fractionation of Conyza extracts, we isolated and identified the acetylenic furanone (4 Z )-lachnophyllum lactone as the major active component, with a concentration required to achieve reduction of 50% Cuscuta seedling growth (IC 50 ) of 24.8 µg/mL. The discovery of (4 Z )-lachnophyllum lactone bioactivity could aid the development of efficient and sustainable management strategies for C. campestris , whose control is limited or non-existent.

Keywords: dodder; parasitic weeds; bioherbicides; sustainable crop protection (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2022
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