Identification of Allelochemicals with Differential Modes of Phytotoxicity against Cuscuta campestris

Antonio Moreno-Robles, Antonio Cala Peralta, Gabriele Soriano, Jesús G. Zorrilla, Marco Masi, Susana Vilariño-Rodríguez, Alessio Cimmino and Mónica Fernández-Aparicio ()
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Antonio Moreno-Robles: Campus de Rabanales, University of Córdoba, 14071 Córdoba, Spain
Antonio Cala Peralta: Department of Chemical Sciences, University of Naples Federico II, Complesso Universitario Monte S. Angelo, Via Cintia, 80126 Naples, Italy
Gabriele Soriano: Department of Chemical Sciences, University of Naples Federico II, Complesso Universitario Monte S. Angelo, Via Cintia, 80126 Naples, Italy
Jesús G. Zorrilla: 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
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
Mónica Fernández-Aparicio: Department of Plant Breeding, Institute for Sustainable Agriculture (IAS), CSIC, Avenida Menéndez Pidal s/n, 14004 Córdoba, Spain

Agriculture, 2022, vol. 12, issue 10, 1-15

Abstract: Cuscuta campestris is a parasitic weed species with noxious effects in broadleaf crops worldwide. The control of Cuscuta in the majority of crops affected is limited or non-existing. We tested, for the first time, the effect of eighteen metabolites in in vitro-grown Cuscuta seedlings. We found that 2-benzoxazolinone, hydrocinnamic acid and pisatin caused the strongest inhibition of seedling growth. In addition to seedling growth, pisatin caused necrosis of the Cuscuta seedling, occurring mostly at the seedling shoot. Scopoletin and sesamol treatments caused toxicity, observed as a black staining, only at the Cuscuta root apices, while caffeic acid, ferulic acid and vanillic acid caused toxicity, observed as brown staining, in the root apices. The structure–activity relationships in four structural derivatives of 2-benzoxazolinone, and five structural derivatives of hydrocinnamic acid, were also studied. The identification of new herbicidal modes of action against Cuscuta is the first step in creating new alternatives to sustainable chemical control of parasitic weeds.

Keywords: field dodder; parasitic weeds; bioherbicides; sustainable crop protection; 2-benzoxazolinone; hydrocinnamic acid; pisatin (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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