| Title: | Aureobasidium pullulans volatile organic compounds as alternative postharvest method to control brown rot of stone fruits |
| Author(s): | Di Francesco A; Di Foggia M; Baraldi E; |
| Address: | "CRIOF - Department of Agricultural Sciences, University of Bologna, Via Gandolfi, 19, 40057, Cadriano, Bologna, Italy; Department of Agricultural and Food Sciences, University of Bologna, Viale Fanin, 46, 40127, Bologna, Italy. Department of Biomedical and Neuromotor Sciences, University of Bologna, Via Belmeloro, 8/2, 40126, Bologna, Italy. CRIOF - Department of Agricultural Sciences, University of Bologna, Via Gandolfi, 19, 40057, Cadriano, Bologna, Italy; Department of Agricultural and Food Sciences, University of Bologna, Viale Fanin, 46, 40127, Bologna, Italy. Electronic address: elena.baraldi@unibo.it" |
| ISSN/ISBN: | 1095-9998 (Electronic) 0740-0020 (Linking) |
| Abstract: | "Volatile compounds produced by L1 and L8 strains were assayed against mycelia and conidia growth of Monilinia laxa, M. fructicola, M. polystroma, and M. fructigena of stone fruits. Results showed that volatile metabolites inhibited significantly pathogens growth, in particular M. fructigena mycelium growth (70% by L1 and 50% by L8) and M. fructicola conidia germination (85% by L1 and 70% by L8) compared to the control. Moreover, the antagonistic activity was enhanced by the addition of asparagine (120 mg L(-1)) in the culture media composition. Synthetic pure compounds were tested in vitro on pathogens mycelial and conidia growth and their EC(50) values were estimated, confirming 2-phenethyl as the most active compound. For this reason 2-phenethyl and VOCs of both yeast strains were assayed in vivo on cherry, peach, and apricot fruits. Regarding peach fruit, both treatments, yeasts and pure compounds, displayed the best inhibiting action against all the pathogens especially against M. laxa (100% by L1, 84% by L8 and 2-phenethyl). ATR/IR spectroscopy analysis showed how VOCs produced by both strains increase the fruit waxes complexity reducing the pathogens attack so playing an essential role in the antagonistic activity of both yeast strains and on fruit structural composition" |
| Keywords: | "Ascomycota/*chemistry/growth & development/metabolism Fruit/microbiology Fungicides, Industrial/chemistry/metabolism/*pharmacology Mycelium/drug effects/growth & development Plant Diseases/*microbiology Prunus persica/microbiology Spores, Fungal/drug effe;" |
| Notes: | "MedlineDi Francesco, Alessandra Di Foggia, Michele Baraldi, Elena eng England 2020/01/18 Food Microbiol. 2020 May; 87:103395. doi: 10.1016/j.fm.2019.103395. Epub 2019 Nov 25" |
