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

• Type: Article in International Scientific Journal
• Date: 2022

Authors

Gimranov, E (Author) Other; Santos, JDN (Author) Other; Vitorino, I (Author) Other; Martin, J (Author) Other; Reyes, F (Author) Other; Moura, L (Author) Other; Fernando Tavares (Author) FCUP; Santos, C (Author) FCUP; Mariz Ponte, N (Author) Other; lage, om (Author) FCUP

Journal

The Journal is awaiting validation by the Administrative Services.

Title: EUROPEAN JOURNAL OF PLANT PATHOLOGY

Vol. 162

Pages: 843-854

ISSN: 0929-1873

Indexing

ISI Web of Knowledge - 6 Citations

Scopus - 6 Citations

Other information

Authenticus ID: P-00V-ZXM

DOI: 10.1007/s10658-021-02441-2

Abstract (EN): The genus Pseudomonas integrates several phytopathogenic species like P. syringae pv. syringae (Pss) and P. syringae pv. actinidae (Psa) and P viridiflava. Currently, effective treatments against these Pseudomonas phytopathogens are limited and mostly based on preventive measures or toxic agrochemicals, which pose risks of resistance-acquisition. Marine bacteria may represent new sources of sustainable bioactive compounds with use in agriculture. We assessed the anti-Pseudomonas activity of extracts from marine bacterial strains of seven genera of Actinobacteria and Planctomycetes. Pseudomonas strains were isolated from Portuguese orchards and included five Psa and one Pseudomonas sp. (B65). All the Pseudomonas strains used in this study shared common characteristics regarding swimming-motility, 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 ranging from 56.48% to 83.08%. LC/HRMS dereplication of these bioactive extracts indicated the presence of several bioactive secondary metabolites like diketopiperazines, opening new perspectives for the use of these bacterial isolates and derived compounds in agriculture.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 12