Transcriptomic and Ultrastructural Analyses of Pyricularia Oryzae Treated With Fungicidal Peptaibol Analogs of Trichoderma Trichogin

Frontiers in Microbiology

卷:12

Hung Minh Nguyen¹  Rita Musetti²  Marta De Zotti³  Silvio Tundo⁴  Luca Sella⁴  Rocco Caracciolo⁴  Rakshita Govind⁴  Francesco Favaron⁴  Alessandra Quarantin⁴  Van V. Vu⁵ 

[1] Center for Molecular Biology, College of Medicine and Pharmacy, Duy Tan University, Da Nang, Vietnam;

[2] Department of Agricultural, Food, Environmental and Animal Sciences, University of Udine, Udine, Italy;

[3] Department of Chemistry (DISC), University of Padova, Padua, Italy;

[4] Department of Land, Environment, Agriculture and Forestry (TESAF), University of Padova, Legnaro, Italy;

[5] NTT Hi-Tech Institute, Nguyen Tat Thanh University, Ho Chi Minh City, Vietnam;

关键词: Pyricularia oryzae;    antimicrobial peptides;    trichogin GA IV;    RNA-seq analysis;    bio-pesticides;   

DOI  :  10.3389/fmicb.2021.753202

来源: DOAJ

【 摘 要 】

Eco-friendly analogs of Trichogin GA IV, a short peptaibol produced by Trichoderma longibrachiatum, were assayed against Pyricularia oryzae, the causal agent of rice blast disease. In vitro and in vivo screenings allowed us to identify six peptides able to reduce by about 70% rice blast symptoms. One of the most active peptides was selected for further studies. Microscopy analyses highlighted that the treated fungal spores could not germinate and the fluorescein-labeled peptide localized on the spore cell wall and in the agglutinated cytoplasm. Transcriptomic analysis was carried out on P. oryzae mycelium 3 h after the peptide treatment. We identified 1,410 differentially expressed genes, two-thirds of which upregulated. Among these, we found genes involved in oxidative stress response, detoxification, autophagic cell death, cell wall biogenesis, degradation and remodeling, melanin and fatty acid biosynthesis, and ion efflux transporters. Molecular data suggest that the trichogin analogs cause cell wall and membrane damages and induce autophagic cell death. Ultrastructure observations on treated conidia and hyphae confirmed the molecular data. In conclusion, these selected peptides seem to be promising alternative molecules for developing effective bio-pesticides able to control rice blast disease.

【 授权许可】

Unknown