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Dual RNA‐Seq of Lysobacter capsici AZ78 – Phytophthora infestans interaction shows the implementation of attack strategies by the bacterium and unsuccessful oomycete defense responses
Author(s) -
Tomada Selena,
Sonego Paolo,
Moretto Marco,
Engelen Kristof,
Pertot Ilaria,
Perazzolli Michele,
Puopolo Gerardo
Publication year - 2017
Publication title -
environmental microbiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.954
H-Index - 188
eISSN - 1462-2920
pISSN - 1462-2912
DOI - 10.1111/1462-2920.13861
Subject(s) - phytophthora infestans , oomycete , biology , phytophthora capsici , gene , rhizosphere , microbiology and biotechnology , effector , bacteria , genetics , botany , phytophthora
Summary Biological interactions in the microbial communities of the rhizosphere continuously shape the gene expression patterns of each individual microorganism. A dual RNA‐Seq approach was applied to obtain a comprehensive overview of the molecular mechanisms activated during the interaction between the biocontrol rhizobacterium Lysobacter capsici AZ78 and the soilborne phytopathogenic oomycete Phytophthora infestans . The RNA‐Seq transcriptional profile of L. capsici AZ78 was characterized by up‐regulation of genes concerned in the biogenesis of type 4 pilus and lytic enzymes, involved, respectively, in host colonization and subsequent attack of the P. infestans cell wall. The activation of detoxification processes allowed L. capsici AZ78 to overcome the attempted defense processes of P. infestans . Moreover, the genes involved in antibiotic biosynthesis were up‐regulated in L. capsici AZ78 and caused cell death in P. infestans , with the activation of putative apoptotic processes. The consequences of P. infestans cell death resulted in the down‐regulation of primary metabolic pathways, such as carbohydrates, nucleic acids and protein metabolisms. Overall, the mechanism of action of L. capsici AZ78 was related to parasitism and predatory activities that cause the death of P. infestans .