Marine bacterial activity against phytopathogenic Pseudomonas show high efficiency of Planctomycetes extracts

Abstract

included five Psa and one Pseudomonas sp. (B65). All the Pseudomonas strains used in this study shared common characteristics regarding swimmingmotility, no biofilm-production in abiotic surfaces and production of indole-3-acetic acid (IAA) using a tryptophan-dependent pathway, showing the maintenance of virulence traits in culture. Four representative Pseudomonas strains were exposed to the marine Actinobacteria and Planctomycetes extracts obtained by liquid-liquid phase (LLPE). Only the planctomycetes Alienimonas chondri, Rhodopirellula rubra, Rubrinisphaera brasiliensis and Novipirellula caenicola inhibited Pseudomonas growth with percentages

Scientific and technological advances in the development of sustainable disease management tools: a case study on kiwifruit bacterial canker

“…Direct antagonism involves killing the pathogenic target through hyperparasitism/predation, whereas mixed-path antagonism involves suppression mechanisms through the production of antibiotics, lytic enzymes, bacteriocins, pathogen-inhibiting volatile compounds and siderophores. In turn, indirect antagonism is related to the induction of host resistance and/or to competition for ecological niches against pathogens ( Tontou et al., 2016a ; Tontou et al., 2016b ; Wachowska et al., 2017 ; Compant et al., 2019 ; Gimranov et al., 2022 ).…”

“…Extracts from four marine bacteria belonging to the phylum Planctomycetes, namely Alienimonas chondri , Rhodopirellula rubra , Rubinisphaera brasiliensis and Novipirellula caenicola obtained from the macroalgal biofilm of Gracilaria bursa-pastoris showed bacteriostatic effect against Psa and other phytopathogenic pseudomonads in a plate assay, whereas extracts from three bacterial species from the phylum Actinobacteria did not show antagonism against the tested targets ( Gimranov et al., 2022 ). Furthermore, lactic acid bacteria ( e.g ., Lactobacillus plantarum ) have also been considered a promising group because of their production of acidifying metabolites (organic acids), antimicrobial peptides ( e.g ., bacteriocins) and other bioactive compounds ( Daranas et al., 2018 ; Purahong et al., 2018 ).…”

Antimicrobial Resistance Profile of Planctomycetota Isolated from Oyster Shell Biofilm: Ecological Relevance within the One Health Concept

“…As already known for the glycopeptide vancomycin, intrinsic resistance mechanisms may also justify some resistance patterns. Additionally, members of the Planctomycetota have been reported to biosynthesize antimicrobial compounds [57][58][59], and it was hypothesized that the production of these bioactive molecules might confer innate defense mechanisms to protect them from their own secondary metabolites [6,57]. For instance, for most of the already studied Planctomycetota, it was possible to identify, by in silico analysis, the presence of several encoding genes responsible for the production of antibiotic molecules such as the 2-deoxystreptamin glucosyltransferase enzyme involved in the biosynthesis of kanamycin [6,60].…”

Stieleria tagensis sp. nov., a novel member of the phylum Planctomycetota isolated from Tagus River in Portugal

“…due to an increasing evidence of their bioactive potential, i.e. the production of antimicrobial and anticancer compounds (Calisto et al 2019 ; Gimranov et al 2022 ; Graca et al 2016 ; Jeske et al 2013 , 2016 ; Sandargo et al 2020 ) and of their potential as supplementary food source for microcrustaceans (Marinho et al 2018 , 2019 ). Additionally, their peculiar characteristics such as macromolecule uptake (Boedeker et al 2017 ; Lonhienne et al 2010 ), complex cellular ultrastructure (Boedeker et al 2017 ; Santarella-Mellwig et al 2010 , 2013 ), broad-range antibiotic resistance (Cayrou et al 2010 ; Godinho et al 2019 ; Ivanova et al 2021 ) and the unusual ftsZ -independent cell division (Jogler et al 2012 ; Rivas-Marin et al 2016 ; Rivas-Marin et al 2020 ) also reinforces the interest in the study of fundamental biology within this phylum.…”