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Salvatore MM, Di Lelio I, DellaGreca M, Nicoletti R, Salvatore F, Russo E, Volpe G, Becchimanzi A, Mahamedi AE, Berraf-Tebbal A, Andolfi A. Secondary Metabolites, including a New 5,6-Dihydropyran-2-One, Produced by the Fungus Diplodia corticola. Aphicidal Activity of the Main Metabolite, Sphaeropsidin A. Molecules 2022; 27:2327. [PMID: 35408726 PMCID: PMC9000672 DOI: 10.3390/molecules27072327] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Revised: 03/30/2022] [Accepted: 03/31/2022] [Indexed: 02/05/2023] Open
Abstract
An undescribed 5,6-dihydropyran-2-one, namely diplopyrone C, was isolated and characterized from the cultures of an isolate of the fungus Diplodia corticola recovered from Quercus suber in Algeria. The structure and relative stereostructure of (5S,6S,7Z,9S,10S)-5-hydroxy-6-(2-(3-methyloxiran-2-yl)vinyl)-5,6-dihydro-2H-pyran-2-one were assigned essentially based on NMR and MS data. Furthermore, ten known compounds were isolated and identified in the same cultures. The most abundant product, the tetracyclic pimarane diterpene sphaeropsidin A, was tested for insecticidal effects against the model sucking aphid, Acyrthosiphon pisum. Results showed a toxic dose-dependent oral activity of sphaeropsidin A, with an LC50 of 9.64 mM.
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Affiliation(s)
- Maria Michela Salvatore
- Department of Chemical Sciences, University of Naples Federico II, 80126 Naples, Italy; (M.M.S.); (M.D.); (F.S.)
- Institute for Sustainable Plant Protection, National Research Council, 80055 Portici, Italy
| | - Ilaria Di Lelio
- Department of Agriculture, University of Naples Federico II, 80055 Portici, Italy; (I.D.L.); (R.N.); (E.R.); (G.V.); (A.B.)
| | - Marina DellaGreca
- Department of Chemical Sciences, University of Naples Federico II, 80126 Naples, Italy; (M.M.S.); (M.D.); (F.S.)
| | - Rosario Nicoletti
- Department of Agriculture, University of Naples Federico II, 80055 Portici, Italy; (I.D.L.); (R.N.); (E.R.); (G.V.); (A.B.)
- Research Center for Olive, Fruit, and Citrus Crops, Council for Agricultural Research and Economics, 81100 Caserta, Italy
| | - Francesco Salvatore
- Department of Chemical Sciences, University of Naples Federico II, 80126 Naples, Italy; (M.M.S.); (M.D.); (F.S.)
| | - Elia Russo
- Department of Agriculture, University of Naples Federico II, 80055 Portici, Italy; (I.D.L.); (R.N.); (E.R.); (G.V.); (A.B.)
| | - Gennaro Volpe
- Department of Agriculture, University of Naples Federico II, 80055 Portici, Italy; (I.D.L.); (R.N.); (E.R.); (G.V.); (A.B.)
| | - Andrea Becchimanzi
- Department of Agriculture, University of Naples Federico II, 80055 Portici, Italy; (I.D.L.); (R.N.); (E.R.); (G.V.); (A.B.)
| | - Alla Eddine Mahamedi
- Department of Biology, Faculty of Natural Sciences, Life and Earth Sciences, University of Ghardaia, Ghardaia 47000, Algeria;
| | - Akila Berraf-Tebbal
- Mendeleum-Institute of Genetics, Faculty of Horticulture, Mendel University in Brno, 69144 Lednice, Czech Republic;
| | - Anna Andolfi
- Department of Chemical Sciences, University of Naples Federico II, 80126 Naples, Italy; (M.M.S.); (M.D.); (F.S.)
- BAT Center-Interuniversity Center for Studies on Bioinspired Agro-Environmental Technology, University of Naples Federico II, 80055 Portici, Italy
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