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Marra R, Coppola M, Pironti A, Grasso F, Lombardi N, d’Errico G, Sicari A, Bolletti Censi S, Woo SL, Rao R, Vinale F. The Application of Trichoderma Strains or Metabolites Alters the Olive Leaf Metabolome and the Expression of Defense-Related Genes. J Fungi (Basel) 2020; 6:jof6040369. [PMID: 33339378 PMCID: PMC7766153 DOI: 10.3390/jof6040369] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Revised: 11/16/2020] [Accepted: 12/09/2020] [Indexed: 12/22/2022] Open
Abstract
Biocontrol fungal strains of the genus Trichoderma can antagonize numerous plant pathogens and promote plant growth using different mechanisms of action, including the production of secondary metabolites (SMs). In this work we analyzed the effects of repeated applications of selected Trichoderma strains or SMs on young olive trees on the stimulation of plant growth and on the development of olive leaf spot disease caused by Fusicladium oleagineum. In addition, metabolomic analyses and gene expression profiles of olive leaves were carried out by LC-MS Q-TOF and real-time RT-PCR, respectively. A total of 104 phenolic compounds were detected from olive leave extracts and 20 were putatively identified. Targeted and untargeted approaches revealed significant differences in both the number and type of phenolic compounds accumulated in olive leaves after Trichoderma applications, as compared to water-treated plants. Different secoiridoids were less abundant in treated plants than in controls, while the accumulation of flavonoids (including luteolin and apigenin derivatives) increased following the application of specific Trichoderma strain. The induction of defense-related genes, and of genes involved in the synthesis of the secoiridoid oleuropein, was also analyzed and revealed a significant variation of gene expression according to the strain or metabolite applied.
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Affiliation(s)
- Roberta Marra
- Department of Agricultural Sciences, University of Naples Federico II, Portici, 80055 Naples, Italy; (M.C.); (A.P.); (F.G.); (N.L.); (G.d.); (R.R.)
- BAT Center-Interuniversity Center for Studies on Bioinspired Agro-Environmental Technology, University of Naples Federico II, Portici, 80055 Naples, Italy; (S.L.W.); (F.V.)
- Correspondence: ; Tel.: +39-0812532253
| | - Mariangela Coppola
- Department of Agricultural Sciences, University of Naples Federico II, Portici, 80055 Naples, Italy; (M.C.); (A.P.); (F.G.); (N.L.); (G.d.); (R.R.)
| | - Angela Pironti
- Department of Agricultural Sciences, University of Naples Federico II, Portici, 80055 Naples, Italy; (M.C.); (A.P.); (F.G.); (N.L.); (G.d.); (R.R.)
| | - Filomena Grasso
- Department of Agricultural Sciences, University of Naples Federico II, Portici, 80055 Naples, Italy; (M.C.); (A.P.); (F.G.); (N.L.); (G.d.); (R.R.)
| | - Nadia Lombardi
- Department of Agricultural Sciences, University of Naples Federico II, Portici, 80055 Naples, Italy; (M.C.); (A.P.); (F.G.); (N.L.); (G.d.); (R.R.)
- BAT Center-Interuniversity Center for Studies on Bioinspired Agro-Environmental Technology, University of Naples Federico II, Portici, 80055 Naples, Italy; (S.L.W.); (F.V.)
| | - Giada d’Errico
- Department of Agricultural Sciences, University of Naples Federico II, Portici, 80055 Naples, Italy; (M.C.); (A.P.); (F.G.); (N.L.); (G.d.); (R.R.)
| | - Andrea Sicari
- Linfa S.c.a r.l., 89900 Vibo Valentia, Italy; (A.S.); (S.B.C.)
| | | | - Sheridan L. Woo
- BAT Center-Interuniversity Center for Studies on Bioinspired Agro-Environmental Technology, University of Naples Federico II, Portici, 80055 Naples, Italy; (S.L.W.); (F.V.)
- Department of Pharmacy, University of Naples Federico II, 80131 Naples, Italy
- Task Force on Microbiome Studies, University of Naples Federico II, 80131 Naples, Italy
| | - Rosa Rao
- Department of Agricultural Sciences, University of Naples Federico II, Portici, 80055 Naples, Italy; (M.C.); (A.P.); (F.G.); (N.L.); (G.d.); (R.R.)
- BAT Center-Interuniversity Center for Studies on Bioinspired Agro-Environmental Technology, University of Naples Federico II, Portici, 80055 Naples, Italy; (S.L.W.); (F.V.)
- Task Force on Microbiome Studies, University of Naples Federico II, 80131 Naples, Italy
| | - Francesco Vinale
- BAT Center-Interuniversity Center for Studies on Bioinspired Agro-Environmental Technology, University of Naples Federico II, Portici, 80055 Naples, Italy; (S.L.W.); (F.V.)
- Department of Veterinary Medicine and Animal Productions, University of Naples Federico II, 80137 Naples, Italy
- Institute for Sustainable Plant Protection, National Research Council, Portici, 80055 Naples, Italy
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